/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c7e336b [2020-10-05 22:17:08,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-05 22:17:08,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-05 22:17:08,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-05 22:17:08,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-05 22:17:08,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-05 22:17:08,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-05 22:17:08,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-05 22:17:08,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-05 22:17:08,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-05 22:17:08,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-05 22:17:08,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-05 22:17:08,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-05 22:17:08,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-05 22:17:08,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-05 22:17:09,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-05 22:17:09,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-05 22:17:09,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-05 22:17:09,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-05 22:17:09,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-05 22:17:09,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-05 22:17:09,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-05 22:17:09,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-05 22:17:09,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-05 22:17:09,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-05 22:17:09,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-05 22:17:09,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-05 22:17:09,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-05 22:17:09,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-05 22:17:09,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-05 22:17:09,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-05 22:17:09,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-05 22:17:09,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-05 22:17:09,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-05 22:17:09,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-05 22:17:09,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-05 22:17:09,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-05 22:17:09,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-05 22:17:09,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-05 22:17:09,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-05 22:17:09,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-05 22:17:09,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-05 22:17:09,087 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-05 22:17:09,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-05 22:17:09,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-05 22:17:09,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-05 22:17:09,090 INFO L138 SettingsManager]: * Use SBE=true [2020-10-05 22:17:09,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-05 22:17:09,091 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-05 22:17:09,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-05 22:17:09,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-05 22:17:09,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-05 22:17:09,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-05 22:17:09,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-05 22:17:09,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-05 22:17:09,094 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-05 22:17:09,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-05 22:17:09,094 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-05 22:17:09,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-05 22:17:09,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-05 22:17:09,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-05 22:17:09,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-05 22:17:09,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-05 22:17:09,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 22:17:09,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-05 22:17:09,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-05 22:17:09,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-05 22:17:09,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-05 22:17:09,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-05 22:17:09,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-05 22:17:09,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-05 22:17:09,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-05 22:17:09,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-05 22:17:09,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-05 22:17:09,424 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-05 22:17:09,425 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-05 22:17:09,427 INFO L275 PluginConnector]: CDTParser initialized [2020-10-05 22:17:09,428 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-10-05 22:17:09,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbf359309/60c0ad68601a43d7a91c3c0737507aec/FLAGecc4ef3c4 [2020-10-05 22:17:10,104 INFO L306 CDTParser]: Found 1 translation units. [2020-10-05 22:17:10,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-10-05 22:17:10,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbf359309/60c0ad68601a43d7a91c3c0737507aec/FLAGecc4ef3c4 [2020-10-05 22:17:10,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbf359309/60c0ad68601a43d7a91c3c0737507aec [2020-10-05 22:17:10,470 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-05 22:17:10,471 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-05 22:17:10,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-05 22:17:10,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-05 22:17:10,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-05 22:17:10,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:17:10" (1/1) ... [2020-10-05 22:17:10,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79748d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:10, skipping insertion in model container [2020-10-05 22:17:10,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:17:10" (1/1) ... [2020-10-05 22:17:10,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-05 22:17:10,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-05 22:17:10,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 22:17:10,974 INFO L203 MainTranslator]: Completed pre-run [2020-10-05 22:17:11,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 22:17:11,101 INFO L208 MainTranslator]: Completed translation [2020-10-05 22:17:11,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11 WrapperNode [2020-10-05 22:17:11,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-05 22:17:11,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-05 22:17:11,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-05 22:17:11,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-05 22:17:11,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-05 22:17:11,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-05 22:17:11,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-05 22:17:11,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-05 22:17:11,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-05 22:17:11,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-05 22:17:11,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-05 22:17:11,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-05 22:17:11,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 22:17:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-05 22:17:11,257 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-05 22:17:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-05 22:17:11,257 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-05 22:17:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-05 22:17:11,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-05 22:17:11,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-05 22:17:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-05 22:17:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-05 22:17:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-05 22:17:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-05 22:17:11,264 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-05 22:17:11,624 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-05 22:17:11,625 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-05 22:17:11,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:17:11 BoogieIcfgContainer [2020-10-05 22:17:11,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-05 22:17:11,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-05 22:17:11,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-05 22:17:11,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-05 22:17:11,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 10:17:10" (1/3) ... [2020-10-05 22:17:11,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef9d6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:17:11, skipping insertion in model container [2020-10-05 22:17:11,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (2/3) ... [2020-10-05 22:17:11,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef9d6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:17:11, skipping insertion in model container [2020-10-05 22:17:11,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:17:11" (3/3) ... [2020-10-05 22:17:11,636 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-10-05 22:17:11,648 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-05 22:17:11,648 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-05 22:17:11,655 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-05 22:17:11,656 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-05 22:17:11,682 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,683 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,683 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,684 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,684 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,684 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,685 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,686 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,686 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,687 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,687 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,688 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,688 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,688 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,689 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,689 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,689 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,690 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,690 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,690 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,690 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,691 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,691 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,691 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,691 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,695 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,696 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,696 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,696 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,696 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,697 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,704 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,704 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,704 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,705 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,705 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,705 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,720 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-05 22:17:11,738 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 22:17:11,738 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 22:17:11,738 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-05 22:17:11,738 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 22:17:11,738 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 22:17:11,739 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 22:17:11,739 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 22:17:11,739 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 22:17:11,752 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-05 22:17:11,753 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-05 22:17:11,794 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-05 22:17:11,794 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-05 22:17:11,800 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-05 22:17:11,803 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-05 22:17:11,821 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-05 22:17:11,821 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-05 22:17:11,822 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-05 22:17:11,824 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-10-05 22:17:11,825 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-10-05 22:17:12,934 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-05 22:17:13,070 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-10-05 22:17:13,070 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-10-05 22:17:13,074 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-05 22:17:13,087 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-05 22:17:13,090 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-05 22:17:13,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-05 22:17:13,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:13,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-05 22:17:13,100 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:13,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:13,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-10-05 22:17:13,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:13,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267342729] [2020-10-05 22:17:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:13,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267342729] [2020-10-05 22:17:13,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:13,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 22:17:13,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73827048] [2020-10-05 22:17:13,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 22:17:13,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:13,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 22:17:13,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-05 22:17:13,399 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-05 22:17:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:13,469 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-05 22:17:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 22:17:13,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-05 22:17:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:13,488 INFO L225 Difference]: With dead ends: 83 [2020-10-05 22:17:13,488 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 22:17:13,490 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 [2020-10-05 22:17:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 22:17:13,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-05 22:17:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:17:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-05 22:17:13,538 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-05 22:17:13,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:13,539 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-05 22:17:13,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 22:17:13,539 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-05 22:17:13,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-05 22:17:13,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:13,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:13,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-05 22:17:13,541 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:13,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:13,542 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-10-05 22:17:13,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:13,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158479787] [2020-10-05 22:17:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:13,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158479787] [2020-10-05 22:17:13,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:13,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 22:17:13,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105977119] [2020-10-05 22:17:13,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 22:17:13,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:13,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 22:17:13,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-05 22:17:13,679 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-05 22:17:13,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:13,735 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-05 22:17:13,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:17:13,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-05 22:17:13,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:13,738 INFO L225 Difference]: With dead ends: 80 [2020-10-05 22:17:13,738 INFO L226 Difference]: Without dead ends: 75 [2020-10-05 22:17:13,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-05 22:17:13,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-05 22:17:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-05 22:17:13,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-05 22:17:13,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-05 22:17:13,750 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-05 22:17:13,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:13,751 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-05 22:17:13,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 22:17:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-05 22:17:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-05 22:17:13,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:13,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:13,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-05 22:17:13,753 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:13,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:13,754 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-10-05 22:17:13,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:13,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855559307] [2020-10-05 22:17:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:13,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855559307] [2020-10-05 22:17:13,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:13,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 22:17:13,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613558220] [2020-10-05 22:17:13,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 22:17:13,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:13,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 22:17:13,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-05 22:17:13,846 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-05 22:17:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:13,892 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-05 22:17:13,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 22:17:13,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-05 22:17:13,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:13,895 INFO L225 Difference]: With dead ends: 73 [2020-10-05 22:17:13,896 INFO L226 Difference]: Without dead ends: 70 [2020-10-05 22:17:13,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-05 22:17:13,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-05 22:17:13,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-05 22:17:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 22:17:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-05 22:17:13,914 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-05 22:17:13,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:13,914 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-05 22:17:13,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 22:17:13,914 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-05 22:17:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-05 22:17:13,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:13,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:13,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-05 22:17:13,920 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:13,920 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-10-05 22:17:13,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:13,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010775741] [2020-10-05 22:17:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:13,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010775741] [2020-10-05 22:17:13,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:13,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 22:17:13,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776121446] [2020-10-05 22:17:13,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 22:17:13,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:13,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 22:17:13,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-05 22:17:13,998 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-05 22:17:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:14,053 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-05 22:17:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:17:14,053 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-05 22:17:14,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:14,055 INFO L225 Difference]: With dead ends: 86 [2020-10-05 22:17:14,055 INFO L226 Difference]: Without dead ends: 80 [2020-10-05 22:17:14,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-05 22:17:14,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-05 22:17:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-05 22:17:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 22:17:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-05 22:17:14,064 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-05 22:17:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:14,064 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-05 22:17:14,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 22:17:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-05 22:17:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-05 22:17:14,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:14,066 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:14,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-05 22:17:14,066 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:14,066 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-10-05 22:17:14,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:14,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907546984] [2020-10-05 22:17:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:14,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907546984] [2020-10-05 22:17:14,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839238205] [2020-10-05 22:17:14,131 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:14,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:14,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:17:14,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:14,269 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:14,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:14,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-05 22:17:14,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518292398] [2020-10-05 22:17:14,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:17:14,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:14,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:17:14,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:17:14,296 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-05 22:17:14,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:14,387 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-05 22:17:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:14,388 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-05 22:17:14,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:14,389 INFO L225 Difference]: With dead ends: 101 [2020-10-05 22:17:14,389 INFO L226 Difference]: Without dead ends: 96 [2020-10-05 22:17:14,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:14,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-05 22:17:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-05 22:17:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-05 22:17:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-05 22:17:14,398 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-05 22:17:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:14,398 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-05 22:17:14,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:17:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-05 22:17:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-05 22:17:14,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:14,400 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:14,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:14,616 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:14,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-10-05 22:17:14,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:14,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335998830] [2020-10-05 22:17:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:14,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335998830] [2020-10-05 22:17:14,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980904422] [2020-10-05 22:17:14,694 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:14,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:14,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:14,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:17:14,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:14,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:14,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 22:17:14,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636735455] [2020-10-05 22:17:14,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:17:14,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:14,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:17:14,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:17:14,822 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-05 22:17:14,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:14,855 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-05 22:17:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 22:17:14,855 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-05 22:17:14,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:14,856 INFO L225 Difference]: With dead ends: 84 [2020-10-05 22:17:14,856 INFO L226 Difference]: Without dead ends: 81 [2020-10-05 22:17:14,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:17:14,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-05 22:17:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-05 22:17:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 22:17:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-05 22:17:14,872 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-05 22:17:14,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:14,873 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-05 22:17:14,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:17:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-05 22:17:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-05 22:17:14,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:14,874 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:15,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:15,075 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:15,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-10-05 22:17:15,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:15,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375651796] [2020-10-05 22:17:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:15,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375651796] [2020-10-05 22:17:15,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546936704] [2020-10-05 22:17:15,165 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:15,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:15,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:15,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:17:15,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:15,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:15,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 22:17:15,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139075349] [2020-10-05 22:17:15,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:17:15,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:15,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:17:15,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:17:15,277 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-05 22:17:15,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:15,334 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-05 22:17:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:17:15,335 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-05 22:17:15,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:15,337 INFO L225 Difference]: With dead ends: 90 [2020-10-05 22:17:15,337 INFO L226 Difference]: Without dead ends: 87 [2020-10-05 22:17:15,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:17:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-05 22:17:15,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-05 22:17:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 22:17:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-05 22:17:15,346 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-05 22:17:15,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:15,347 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-05 22:17:15,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:17:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-05 22:17:15,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-05 22:17:15,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:15,348 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:15,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:15,558 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:15,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:15,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-10-05 22:17:15,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:15,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668368667] [2020-10-05 22:17:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:15,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668368667] [2020-10-05 22:17:15,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010772070] [2020-10-05 22:17:15,625 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:15,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:15,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:15,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:17:15,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:15,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:15,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:15,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 22:17:15,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320232677] [2020-10-05 22:17:15,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:17:15,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:15,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:17:15,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:17:15,729 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-05 22:17:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:15,869 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-05 22:17:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:15,870 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-05 22:17:15,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:15,871 INFO L225 Difference]: With dead ends: 99 [2020-10-05 22:17:15,871 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 22:17:15,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:17:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 22:17:15,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-05 22:17:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-05 22:17:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-05 22:17:15,879 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-05 22:17:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:15,879 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-05 22:17:15,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:17:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-05 22:17:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:15,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:15,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:16,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:16,095 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:16,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:16,096 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-10-05 22:17:16,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:16,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036594676] [2020-10-05 22:17:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:16,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036594676] [2020-10-05 22:17:16,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:16,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:17:16,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476149321] [2020-10-05 22:17:16,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:17:16,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:16,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:17:16,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:17:16,158 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-05 22:17:16,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:16,186 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-05 22:17:16,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 22:17:16,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:17:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:16,188 INFO L225 Difference]: With dead ends: 92 [2020-10-05 22:17:16,188 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 22:17:16,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:17:16,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 22:17:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-05 22:17:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-05 22:17:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-05 22:17:16,194 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-05 22:17:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:16,195 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-05 22:17:16,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:17:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-05 22:17:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:16,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:16,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:16,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-05 22:17:16,197 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-10-05 22:17:16,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:16,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465946902] [2020-10-05 22:17:16,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:16,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465946902] [2020-10-05 22:17:16,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:16,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:17:16,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768397449] [2020-10-05 22:17:16,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:17:16,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:16,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:17:16,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:17:16,263 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-05 22:17:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:16,306 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-05 22:17:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:17:16,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:17:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:16,308 INFO L225 Difference]: With dead ends: 100 [2020-10-05 22:17:16,308 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 22:17:16,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-05 22:17:16,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 22:17:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-05 22:17:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-05 22:17:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-05 22:17:16,314 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-05 22:17:16,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:16,314 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-05 22:17:16,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:17:16,315 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-05 22:17:16,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:16,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:16,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:16,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-05 22:17:16,316 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:16,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:16,316 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-10-05 22:17:16,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:16,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942354747] [2020-10-05 22:17:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:16,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942354747] [2020-10-05 22:17:16,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:16,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:17:16,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788875245] [2020-10-05 22:17:16,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:17:16,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:16,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:17:16,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:17:16,416 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-05 22:17:16,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:16,483 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-05 22:17:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:16,483 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:17:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:16,484 INFO L225 Difference]: With dead ends: 105 [2020-10-05 22:17:16,484 INFO L226 Difference]: Without dead ends: 100 [2020-10-05 22:17:16,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:17:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-05 22:17:16,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-05 22:17:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 22:17:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-05 22:17:16,499 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-05 22:17:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:16,500 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-05 22:17:16,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:17:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-05 22:17:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:16,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:16,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:16,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-05 22:17:16,501 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:16,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:16,502 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-10-05 22:17:16,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:16,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504374748] [2020-10-05 22:17:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:16,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504374748] [2020-10-05 22:17:16,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:16,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:17:16,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819990397] [2020-10-05 22:17:16,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:17:16,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:16,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:17:16,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:17:16,557 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-05 22:17:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:16,627 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-05 22:17:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:16,627 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:17:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:16,629 INFO L225 Difference]: With dead ends: 105 [2020-10-05 22:17:16,629 INFO L226 Difference]: Without dead ends: 100 [2020-10-05 22:17:16,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:17:16,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-05 22:17:16,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-05 22:17:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 22:17:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-05 22:17:16,634 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-05 22:17:16,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:16,634 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-05 22:17:16,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:17:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-05 22:17:16,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:16,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:16,636 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:16,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-05 22:17:16,636 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:16,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:16,636 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-10-05 22:17:16,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:16,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955005627] [2020-10-05 22:17:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:16,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955005627] [2020-10-05 22:17:16,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370872280] [2020-10-05 22:17:16,705 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:16,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:16,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:16,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:16,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:16,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:16,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:16,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-05 22:17:16,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139363326] [2020-10-05 22:17:16,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:17:16,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:16,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:17:16,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:17:16,846 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-05 22:17:16,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:16,951 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-05 22:17:16,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:16,952 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-05 22:17:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:16,954 INFO L225 Difference]: With dead ends: 122 [2020-10-05 22:17:16,954 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 22:17:16,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:17:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 22:17:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-05 22:17:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-05 22:17:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-05 22:17:16,961 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-05 22:17:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:16,961 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-05 22:17:16,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:17:16,961 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-05 22:17:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:16,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:16,962 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:17,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-05 22:17:17,173 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:17,174 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-10-05 22:17:17,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:17,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613403119] [2020-10-05 22:17:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:17,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613403119] [2020-10-05 22:17:17,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935686208] [2020-10-05 22:17:17,283 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:17,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:17,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:17,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:17,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:17,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:17,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:17,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060198476] [2020-10-05 22:17:17,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:17,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:17,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:17,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:17,407 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-05 22:17:17,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:17,437 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-05 22:17:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:17:17,437 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-05 22:17:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:17,438 INFO L225 Difference]: With dead ends: 108 [2020-10-05 22:17:17,438 INFO L226 Difference]: Without dead ends: 105 [2020-10-05 22:17:17,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-05 22:17:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-05 22:17:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-05 22:17:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-05 22:17:17,443 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-05 22:17:17,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:17,443 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-05 22:17:17,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-05 22:17:17,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:17,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:17,444 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:17,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:17,657 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:17,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:17,657 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-10-05 22:17:17,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:17,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087319835] [2020-10-05 22:17:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:17,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087319835] [2020-10-05 22:17:17,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736056228] [2020-10-05 22:17:17,726 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:17,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:17,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:17,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:17,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:17,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532010640] [2020-10-05 22:17:17,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:17,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:17,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:17,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:17,849 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-05 22:17:17,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:17,896 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-05 22:17:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:17:17,897 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-05 22:17:17,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:17,898 INFO L225 Difference]: With dead ends: 116 [2020-10-05 22:17:17,898 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 22:17:17,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:17:17,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 22:17:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-05 22:17:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-05 22:17:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-05 22:17:17,903 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-05 22:17:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:17,903 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-05 22:17:17,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:17,903 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-05 22:17:17,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:17,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:17,904 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:18,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-05 22:17:18,116 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:18,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:18,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-10-05 22:17:18,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:18,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685029558] [2020-10-05 22:17:18,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:18,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685029558] [2020-10-05 22:17:18,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522189778] [2020-10-05 22:17:18,180 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:18,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:18,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:18,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:18,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:18,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:18,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:18,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268482563] [2020-10-05 22:17:18,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:18,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:18,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:18,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:18,320 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-05 22:17:18,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:18,417 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-05 22:17:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:18,417 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-05 22:17:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:18,419 INFO L225 Difference]: With dead ends: 115 [2020-10-05 22:17:18,419 INFO L226 Difference]: Without dead ends: 112 [2020-10-05 22:17:18,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-05 22:17:18,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-05 22:17:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-05 22:17:18,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-05 22:17:18,425 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-05 22:17:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:18,425 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-05 22:17:18,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:18,425 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-05 22:17:18,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:18,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:18,426 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:18,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-05 22:17:18,637 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:18,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:18,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-10-05 22:17:18,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:18,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396281345] [2020-10-05 22:17:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:18,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396281345] [2020-10-05 22:17:18,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29256338] [2020-10-05 22:17:18,691 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:18,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:18,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:18,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:18,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:18,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:18,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:18,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:18,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389139198] [2020-10-05 22:17:18,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:18,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:18,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:18,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:18,850 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-05 22:17:18,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:18,972 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-05 22:17:18,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:18,974 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-05 22:17:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:18,975 INFO L225 Difference]: With dead ends: 124 [2020-10-05 22:17:18,975 INFO L226 Difference]: Without dead ends: 118 [2020-10-05 22:17:18,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:18,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-05 22:17:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-05 22:17:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-05 22:17:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-05 22:17:18,981 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-05 22:17:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:18,981 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-05 22:17:18,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-05 22:17:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:18,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:18,982 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:19,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-05 22:17:19,194 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:19,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:19,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-10-05 22:17:19,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:19,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174446571] [2020-10-05 22:17:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:19,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174446571] [2020-10-05 22:17:19,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433641142] [2020-10-05 22:17:19,258 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:19,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:19,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:19,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:19,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:19,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:19,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:19,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755021704] [2020-10-05 22:17:19,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:19,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:19,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:19,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:19,376 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-05 22:17:19,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:19,422 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-05 22:17:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:17:19,422 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:19,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:19,423 INFO L225 Difference]: With dead ends: 113 [2020-10-05 22:17:19,424 INFO L226 Difference]: Without dead ends: 111 [2020-10-05 22:17:19,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:19,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-05 22:17:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-05 22:17:19,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-05 22:17:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-05 22:17:19,428 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-05 22:17:19,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:19,428 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-05 22:17:19,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:19,428 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-05 22:17:19,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:19,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:19,429 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:19,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-05 22:17:19,639 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:19,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-10-05 22:17:19,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:19,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275534262] [2020-10-05 22:17:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:19,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275534262] [2020-10-05 22:17:19,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988936532] [2020-10-05 22:17:19,715 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:19,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:19,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:19,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:19,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:19,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:19,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:19,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664271314] [2020-10-05 22:17:19,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:19,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:19,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:19,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:19,821 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-05 22:17:19,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:19,882 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-05 22:17:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:17:19,882 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:19,883 INFO L225 Difference]: With dead ends: 118 [2020-10-05 22:17:19,883 INFO L226 Difference]: Without dead ends: 116 [2020-10-05 22:17:19,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-05 22:17:19,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-05 22:17:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-05 22:17:19,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-05 22:17:19,888 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-05 22:17:19,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:19,888 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-05 22:17:19,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-05 22:17:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:19,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:19,889 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:20,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:20,090 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:20,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:20,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-10-05 22:17:20,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:20,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986246059] [2020-10-05 22:17:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:20,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986246059] [2020-10-05 22:17:20,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070911633] [2020-10-05 22:17:20,182 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:20,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:20,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:20,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:20,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:20,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541237267] [2020-10-05 22:17:20,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:20,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:20,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:20,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:20,330 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-05 22:17:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:20,401 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-05 22:17:20,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:17:20,402 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:20,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:20,403 INFO L225 Difference]: With dead ends: 119 [2020-10-05 22:17:20,403 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 22:17:20,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:20,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 22:17:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-05 22:17:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-05 22:17:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-05 22:17:20,407 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-05 22:17:20,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:20,408 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-05 22:17:20,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:20,408 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-05 22:17:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:20,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:20,409 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:20,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:20,609 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:20,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:20,610 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-10-05 22:17:20,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:20,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082852680] [2020-10-05 22:17:20,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:20,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082852680] [2020-10-05 22:17:20,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336820428] [2020-10-05 22:17:20,710 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:20,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:20,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:20,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:20,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:20,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:20,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:20,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932852984] [2020-10-05 22:17:20,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:20,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:20,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:20,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:20,879 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-05 22:17:20,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:20,947 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-05 22:17:20,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:17:20,949 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:20,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:20,950 INFO L225 Difference]: With dead ends: 122 [2020-10-05 22:17:20,950 INFO L226 Difference]: Without dead ends: 120 [2020-10-05 22:17:20,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:17:20,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-05 22:17:20,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-05 22:17:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-05 22:17:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-05 22:17:20,958 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-05 22:17:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:20,959 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-05 22:17:20,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-05 22:17:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:20,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:20,960 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:21,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-05 22:17:21,174 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:21,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:21,175 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-10-05 22:17:21,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:21,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21835360] [2020-10-05 22:17:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:21,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21835360] [2020-10-05 22:17:21,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187387033] [2020-10-05 22:17:21,245 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:21,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:21,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:21,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:21,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:21,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:21,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:21,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494209086] [2020-10-05 22:17:21,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:21,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:21,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:21,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:21,359 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-05 22:17:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:21,467 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-05 22:17:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:21,468 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:21,469 INFO L225 Difference]: With dead ends: 123 [2020-10-05 22:17:21,469 INFO L226 Difference]: Without dead ends: 121 [2020-10-05 22:17:21,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:17:21,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-05 22:17:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-05 22:17:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-05 22:17:21,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-05 22:17:21,474 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-05 22:17:21,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:21,474 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-05 22:17:21,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:21,475 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-05 22:17:21,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:21,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:21,475 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:21,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:21,676 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:21,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-10-05 22:17:21,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:21,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717113818] [2020-10-05 22:17:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:21,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717113818] [2020-10-05 22:17:21,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938659321] [2020-10-05 22:17:21,740 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:21,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:21,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:21,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:21,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:21,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:21,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:21,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334183381] [2020-10-05 22:17:21,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:21,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:21,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:21,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:21,857 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-05 22:17:21,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:21,927 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-05 22:17:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:21,928 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:21,929 INFO L225 Difference]: With dead ends: 123 [2020-10-05 22:17:21,929 INFO L226 Difference]: Without dead ends: 121 [2020-10-05 22:17:21,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-05 22:17:21,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-05 22:17:21,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-05 22:17:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-05 22:17:21,934 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-05 22:17:21,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:21,934 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-05 22:17:21,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:21,934 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-05 22:17:21,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:21,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:21,935 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:22,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-05 22:17:22,136 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-10-05 22:17:22,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:22,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446679967] [2020-10-05 22:17:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:22,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446679967] [2020-10-05 22:17:22,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313709715] [2020-10-05 22:17:22,209 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:22,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:22,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:22,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:22,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:22,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:22,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:22,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:22,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550432873] [2020-10-05 22:17:22,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:22,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:22,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:22,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:22,360 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-05 22:17:22,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:22,522 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-05 22:17:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:22,523 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:22,524 INFO L225 Difference]: With dead ends: 133 [2020-10-05 22:17:22,524 INFO L226 Difference]: Without dead ends: 128 [2020-10-05 22:17:22,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-05 22:17:22,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-05 22:17:22,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-05 22:17:22,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-05 22:17:22,530 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-05 22:17:22,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:22,530 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-05 22:17:22,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:22,530 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-05 22:17:22,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:22,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:22,531 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:22,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:22,743 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:22,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:22,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-10-05 22:17:22,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:22,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696876652] [2020-10-05 22:17:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:22,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696876652] [2020-10-05 22:17:22,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062370905] [2020-10-05 22:17:22,795 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:22,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:22,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:22,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:22,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:22,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:22,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:22,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534769195] [2020-10-05 22:17:22,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:22,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:22,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:22,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:22,931 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-05 22:17:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:23,053 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-05 22:17:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:23,054 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:23,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:23,055 INFO L225 Difference]: With dead ends: 127 [2020-10-05 22:17:23,055 INFO L226 Difference]: Without dead ends: 125 [2020-10-05 22:17:23,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:23,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-05 22:17:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-05 22:17:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-05 22:17:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-05 22:17:23,060 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-05 22:17:23,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:23,060 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-05 22:17:23,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-05 22:17:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:23,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:23,061 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:23,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-05 22:17:23,272 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:23,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-10-05 22:17:23,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:23,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256786312] [2020-10-05 22:17:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:23,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256786312] [2020-10-05 22:17:23,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099122587] [2020-10-05 22:17:23,324 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:23,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:23,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:23,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:23,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:23,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:23,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355699844] [2020-10-05 22:17:23,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:23,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:23,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:23,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:23,428 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-05 22:17:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:23,629 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-05 22:17:23,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:17:23,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:23,632 INFO L225 Difference]: With dead ends: 141 [2020-10-05 22:17:23,632 INFO L226 Difference]: Without dead ends: 136 [2020-10-05 22:17:23,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:17:23,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-05 22:17:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-05 22:17:23,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-05 22:17:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-05 22:17:23,638 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-05 22:17:23,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:23,638 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-05 22:17:23,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-05 22:17:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:23,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:23,640 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:23,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-05 22:17:23,850 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:23,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:23,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-10-05 22:17:23,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:23,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041156250] [2020-10-05 22:17:23,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:23,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041156250] [2020-10-05 22:17:23,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470803925] [2020-10-05 22:17:23,909 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:23,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:23,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:23,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:23,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:24,040 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:24,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:24,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:24,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324226778] [2020-10-05 22:17:24,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:24,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:24,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:24,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:24,053 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-05 22:17:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:24,210 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-05 22:17:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:24,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:24,211 INFO L225 Difference]: With dead ends: 136 [2020-10-05 22:17:24,212 INFO L226 Difference]: Without dead ends: 131 [2020-10-05 22:17:24,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-05 22:17:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-05 22:17:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-05 22:17:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-05 22:17:24,216 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-05 22:17:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:24,217 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-05 22:17:24,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-05 22:17:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:24,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:24,217 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:24,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-05 22:17:24,430 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:24,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:24,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-10-05 22:17:24,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:24,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094483897] [2020-10-05 22:17:24,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:24,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094483897] [2020-10-05 22:17:24,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610366530] [2020-10-05 22:17:24,485 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:24,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:24,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:24,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:24,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:24,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:24,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:24,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332434887] [2020-10-05 22:17:24,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:24,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:24,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:24,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:24,601 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-05 22:17:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:24,707 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-05 22:17:24,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:24,708 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:24,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:24,710 INFO L225 Difference]: With dead ends: 130 [2020-10-05 22:17:24,710 INFO L226 Difference]: Without dead ends: 128 [2020-10-05 22:17:24,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:17:24,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-05 22:17:24,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-05 22:17:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-05 22:17:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-05 22:17:24,714 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-05 22:17:24,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:24,715 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-05 22:17:24,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:24,715 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-05 22:17:24,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:24,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:24,716 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:24,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-05 22:17:24,926 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:24,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:24,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-10-05 22:17:24,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:24,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521984933] [2020-10-05 22:17:24,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:24,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521984933] [2020-10-05 22:17:24,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447633223] [2020-10-05 22:17:24,999 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:25,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:25,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:25,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:25,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:25,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:25,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:25,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444645762] [2020-10-05 22:17:25,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:25,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:25,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:25,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:25,132 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-05 22:17:25,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:25,262 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-05 22:17:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:17:25,263 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:25,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:25,264 INFO L225 Difference]: With dead ends: 131 [2020-10-05 22:17:25,264 INFO L226 Difference]: Without dead ends: 129 [2020-10-05 22:17:25,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:17:25,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-05 22:17:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-05 22:17:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-05 22:17:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-05 22:17:25,270 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-05 22:17:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:25,271 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-05 22:17:25,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-05 22:17:25,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:25,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:25,272 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:25,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-05 22:17:25,481 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:25,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:25,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-10-05 22:17:25,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:25,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94427837] [2020-10-05 22:17:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:25,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94427837] [2020-10-05 22:17:25,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936366594] [2020-10-05 22:17:25,536 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:25,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:25,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:25,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:25,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:25,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:25,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:25,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:25,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859101608] [2020-10-05 22:17:25,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:25,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:25,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:25,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:25,646 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-05 22:17:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:25,807 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-05 22:17:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:25,808 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:25,809 INFO L225 Difference]: With dead ends: 131 [2020-10-05 22:17:25,810 INFO L226 Difference]: Without dead ends: 126 [2020-10-05 22:17:25,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-05 22:17:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-05 22:17:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-05 22:17:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-05 22:17:25,815 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-05 22:17:25,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:25,815 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-05 22:17:25,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:25,815 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-05 22:17:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:25,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:25,816 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:26,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:26,027 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:26,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-10-05 22:17:26,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:26,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18444119] [2020-10-05 22:17:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:26,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18444119] [2020-10-05 22:17:26,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276310019] [2020-10-05 22:17:26,080 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:26,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:26,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:26,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:26,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:26,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:26,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:26,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:26,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025578327] [2020-10-05 22:17:26,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:26,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:26,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:26,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:26,179 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-05 22:17:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:26,399 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-05 22:17:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:17:26,403 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:26,404 INFO L225 Difference]: With dead ends: 145 [2020-10-05 22:17:26,404 INFO L226 Difference]: Without dead ends: 140 [2020-10-05 22:17:26,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:17:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-05 22:17:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-05 22:17:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-05 22:17:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-05 22:17:26,408 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-05 22:17:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:26,409 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-05 22:17:26,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-05 22:17:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:26,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:26,409 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:26,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-05 22:17:26,620 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:26,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:26,620 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-10-05 22:17:26,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:26,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810228489] [2020-10-05 22:17:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:26,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810228489] [2020-10-05 22:17:26,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890856493] [2020-10-05 22:17:26,670 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:26,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:26,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:26,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:26,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:26,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:26,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207487293] [2020-10-05 22:17:26,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:26,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:26,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:26,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:26,781 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-05 22:17:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:26,957 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-05 22:17:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:26,957 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:26,958 INFO L225 Difference]: With dead ends: 135 [2020-10-05 22:17:26,958 INFO L226 Difference]: Without dead ends: 130 [2020-10-05 22:17:26,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:26,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-05 22:17:26,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-05 22:17:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-05 22:17:26,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-05 22:17:26,962 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-05 22:17:26,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:26,963 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-05 22:17:26,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-05 22:17:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:26,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:26,964 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:27,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:27,165 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:27,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:27,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-10-05 22:17:27,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:27,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926180263] [2020-10-05 22:17:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:27,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926180263] [2020-10-05 22:17:27,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105526312] [2020-10-05 22:17:27,243 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 [2020-10-05 22:17:27,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:27,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:27,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:27,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:27,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:27,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:27,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-05 22:17:27,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473283898] [2020-10-05 22:17:27,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:17:27,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:27,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:17:27,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:17:27,404 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-05 22:17:27,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:27,530 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-05 22:17:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:27,531 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-05 22:17:27,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:27,532 INFO L225 Difference]: With dead ends: 143 [2020-10-05 22:17:27,532 INFO L226 Difference]: Without dead ends: 138 [2020-10-05 22:17:27,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:17:27,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-05 22:17:27,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-05 22:17:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-05 22:17:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-05 22:17:27,537 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-05 22:17:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:27,537 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-05 22:17:27,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:17:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-05 22:17:27,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:27,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:27,538 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:27,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-05 22:17:27,744 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:27,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:27,744 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-10-05 22:17:27,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:27,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914512976] [2020-10-05 22:17:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:27,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914512976] [2020-10-05 22:17:27,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833335851] [2020-10-05 22:17:27,869 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:27,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:27,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:27,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:27,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:28,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:28,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:28,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160749104] [2020-10-05 22:17:28,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:28,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:28,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:28,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:28,009 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-05 22:17:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:28,058 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-05 22:17:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:17:28,059 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-05 22:17:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:28,060 INFO L225 Difference]: With dead ends: 132 [2020-10-05 22:17:28,061 INFO L226 Difference]: Without dead ends: 129 [2020-10-05 22:17:28,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-05 22:17:28,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-05 22:17:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-05 22:17:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-05 22:17:28,064 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-05 22:17:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:28,065 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-05 22:17:28,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-05 22:17:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:28,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:28,066 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:28,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-05 22:17:28,275 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:28,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:28,276 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-10-05 22:17:28,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:28,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236356860] [2020-10-05 22:17:28,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:28,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236356860] [2020-10-05 22:17:28,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635895357] [2020-10-05 22:17:28,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:28,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:17:28,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:28,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:28,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:28,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:28,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:28,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863881923] [2020-10-05 22:17:28,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:28,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:28,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:28,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:28,502 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-05 22:17:28,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:28,564 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-05 22:17:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:28,564 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-05 22:17:28,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:28,566 INFO L225 Difference]: With dead ends: 143 [2020-10-05 22:17:28,566 INFO L226 Difference]: Without dead ends: 140 [2020-10-05 22:17:28,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:17:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-05 22:17:28,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-05 22:17:28,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-05 22:17:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-05 22:17:28,570 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-05 22:17:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:28,570 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-05 22:17:28,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:28,570 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-05 22:17:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:28,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:28,571 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:28,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-05 22:17:28,780 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-10-05 22:17:28,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:28,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921143472] [2020-10-05 22:17:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:28,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921143472] [2020-10-05 22:17:28,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507795178] [2020-10-05 22:17:28,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:28,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:17:28,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:28,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:28,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:29,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:29,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:29,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868610414] [2020-10-05 22:17:29,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:29,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:29,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:29,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:29,016 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-05 22:17:29,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:29,126 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-05 22:17:29,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:29,127 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-05 22:17:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:29,128 INFO L225 Difference]: With dead ends: 142 [2020-10-05 22:17:29,128 INFO L226 Difference]: Without dead ends: 139 [2020-10-05 22:17:29,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:29,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-05 22:17:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-05 22:17:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-05 22:17:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-05 22:17:29,134 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-05 22:17:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:29,134 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-05 22:17:29,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-05 22:17:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:29,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:29,135 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:29,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-05 22:17:29,346 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:29,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:29,347 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-10-05 22:17:29,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:29,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431090705] [2020-10-05 22:17:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:29,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431090705] [2020-10-05 22:17:29,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369694412] [2020-10-05 22:17:29,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:29,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:29,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:29,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:29,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121760800] [2020-10-05 22:17:29,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:29,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:29,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:29,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:29,548 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-05 22:17:29,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:29,637 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-05 22:17:29,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:29,637 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-05 22:17:29,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:29,639 INFO L225 Difference]: With dead ends: 141 [2020-10-05 22:17:29,639 INFO L226 Difference]: Without dead ends: 138 [2020-10-05 22:17:29,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:17:29,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-05 22:17:29,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-05 22:17:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-05 22:17:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-05 22:17:29,643 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-05 22:17:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:29,643 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-05 22:17:29,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-05 22:17:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:29,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:29,644 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:29,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-05 22:17:29,856 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:29,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:29,856 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-10-05 22:17:29,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:29,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303175288] [2020-10-05 22:17:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:29,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303175288] [2020-10-05 22:17:29,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368278132] [2020-10-05 22:17:29,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:29,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:29,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:29,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:29,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:30,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:30,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:30,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:30,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461998608] [2020-10-05 22:17:30,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:30,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:30,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:30,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:30,089 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-05 22:17:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:30,218 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-05 22:17:30,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:30,219 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-05 22:17:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:30,220 INFO L225 Difference]: With dead ends: 150 [2020-10-05 22:17:30,220 INFO L226 Difference]: Without dead ends: 144 [2020-10-05 22:17:30,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:17:30,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-05 22:17:30,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-05 22:17:30,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-05 22:17:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-05 22:17:30,225 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-05 22:17:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:30,225 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-05 22:17:30,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:30,226 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-05 22:17:30,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:30,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:30,226 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:30,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:30,439 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:30,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:30,439 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-10-05 22:17:30,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:30,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376218773] [2020-10-05 22:17:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:30,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376218773] [2020-10-05 22:17:30,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040612958] [2020-10-05 22:17:30,514 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:30,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:30,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:30,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:30,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:30,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:30,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:30,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892899468] [2020-10-05 22:17:30,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:30,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:30,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:30,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:30,647 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-05 22:17:30,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:30,701 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-05 22:17:30,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:17:30,701 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:30,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:30,703 INFO L225 Difference]: With dead ends: 138 [2020-10-05 22:17:30,703 INFO L226 Difference]: Without dead ends: 136 [2020-10-05 22:17:30,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-05 22:17:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-05 22:17:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-05 22:17:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-05 22:17:30,707 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-05 22:17:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:30,707 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-05 22:17:30,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:30,708 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-05 22:17:30,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:30,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:30,708 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:30,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-05 22:17:30,919 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:30,919 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-10-05 22:17:30,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:30,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991149919] [2020-10-05 22:17:30,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:30,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991149919] [2020-10-05 22:17:30,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903305472] [2020-10-05 22:17:30,991 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:31,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:31,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:31,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:31,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:31,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:31,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:31,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734711565] [2020-10-05 22:17:31,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:31,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:31,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:31,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:31,138 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-05 22:17:31,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:31,261 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-05 22:17:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:31,261 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:31,263 INFO L225 Difference]: With dead ends: 145 [2020-10-05 22:17:31,263 INFO L226 Difference]: Without dead ends: 143 [2020-10-05 22:17:31,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:17:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-05 22:17:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-05 22:17:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-05 22:17:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-05 22:17:31,267 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-05 22:17:31,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:31,268 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-05 22:17:31,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:31,268 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-05 22:17:31,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:31,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:31,269 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:31,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-05 22:17:31,480 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:31,481 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-10-05 22:17:31,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:31,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983598604] [2020-10-05 22:17:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:31,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983598604] [2020-10-05 22:17:31,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019229905] [2020-10-05 22:17:31,550 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:31,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:31,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:31,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:31,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:31,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:31,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:31,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214206052] [2020-10-05 22:17:31,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:31,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:31,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:31,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:31,685 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-05 22:17:31,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:31,851 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-05 22:17:31,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:31,852 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:31,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:31,853 INFO L225 Difference]: With dead ends: 150 [2020-10-05 22:17:31,853 INFO L226 Difference]: Without dead ends: 148 [2020-10-05 22:17:31,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:31,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-05 22:17:31,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-05 22:17:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-05 22:17:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-05 22:17:31,857 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-05 22:17:31,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:31,858 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-05 22:17:31,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:31,858 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-05 22:17:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:31,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:31,859 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:32,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:32,069 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:32,070 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-10-05 22:17:32,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:32,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919223439] [2020-10-05 22:17:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:32,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919223439] [2020-10-05 22:17:32,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013887174] [2020-10-05 22:17:32,148 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:32,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:17:32,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:32,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:32,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:32,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:32,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:32,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167222600] [2020-10-05 22:17:32,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:32,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:32,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:32,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:32,294 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-05 22:17:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:32,405 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-05 22:17:32,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:32,405 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:32,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:32,406 INFO L225 Difference]: With dead ends: 148 [2020-10-05 22:17:32,406 INFO L226 Difference]: Without dead ends: 146 [2020-10-05 22:17:32,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-05 22:17:32,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-05 22:17:32,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-05 22:17:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-05 22:17:32,411 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-05 22:17:32,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:32,411 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-05 22:17:32,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:32,411 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-05 22:17:32,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:32,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:32,412 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:32,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-05 22:17:32,622 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:32,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:32,622 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-10-05 22:17:32,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:32,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925468468] [2020-10-05 22:17:32,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:32,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925468468] [2020-10-05 22:17:32,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624795316] [2020-10-05 22:17:32,691 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:32,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:32,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:32,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:32,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:32,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:32,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:32,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190364075] [2020-10-05 22:17:32,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:32,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:32,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:32,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:32,851 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-05 22:17:32,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:32,979 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-05 22:17:32,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:32,980 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:32,981 INFO L225 Difference]: With dead ends: 149 [2020-10-05 22:17:32,981 INFO L226 Difference]: Without dead ends: 147 [2020-10-05 22:17:32,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-05 22:17:32,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-05 22:17:32,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-05 22:17:32,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-05 22:17:32,985 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-05 22:17:32,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:32,986 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-05 22:17:32,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:32,986 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-05 22:17:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:32,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:32,987 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:33,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:33,197 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:33,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-10-05 22:17:33,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:33,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441303400] [2020-10-05 22:17:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:33,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441303400] [2020-10-05 22:17:33,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993594347] [2020-10-05 22:17:33,293 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:33,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:33,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:33,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:33,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:33,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567973169] [2020-10-05 22:17:33,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:33,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:33,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:33,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:33,458 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-05 22:17:33,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:33,537 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-05 22:17:33,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:33,538 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:33,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:33,539 INFO L225 Difference]: With dead ends: 152 [2020-10-05 22:17:33,539 INFO L226 Difference]: Without dead ends: 150 [2020-10-05 22:17:33,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:17:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-05 22:17:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-05 22:17:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-05 22:17:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-05 22:17:33,545 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-05 22:17:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:33,546 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-05 22:17:33,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-05 22:17:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:33,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:33,547 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:33,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-05 22:17:33,759 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:33,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:33,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-10-05 22:17:33,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:33,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178029347] [2020-10-05 22:17:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:33,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178029347] [2020-10-05 22:17:33,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112529098] [2020-10-05 22:17:33,865 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:33,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:33,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:33,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:33,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:34,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:34,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:34,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512514783] [2020-10-05 22:17:34,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:34,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:34,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:34,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:34,061 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-05 22:17:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:34,257 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-05 22:17:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:17:34,257 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:34,258 INFO L225 Difference]: With dead ends: 153 [2020-10-05 22:17:34,258 INFO L226 Difference]: Without dead ends: 151 [2020-10-05 22:17:34,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-05 22:17:34,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-05 22:17:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-05 22:17:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-05 22:17:34,263 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-05 22:17:34,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:34,263 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-05 22:17:34,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-05 22:17:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:34,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:34,264 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:34,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-05 22:17:34,474 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:34,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:34,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-10-05 22:17:34,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:34,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822421351] [2020-10-05 22:17:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:34,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822421351] [2020-10-05 22:17:34,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81616090] [2020-10-05 22:17:34,556 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:34,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:34,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:34,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:34,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:34,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:34,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:34,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779766174] [2020-10-05 22:17:34,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:34,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:34,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:34,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:34,688 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-05 22:17:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:34,837 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-05 22:17:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:17:34,837 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:34,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:34,839 INFO L225 Difference]: With dead ends: 156 [2020-10-05 22:17:34,839 INFO L226 Difference]: Without dead ends: 154 [2020-10-05 22:17:34,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:17:34,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-05 22:17:34,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-05 22:17:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-05 22:17:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-05 22:17:34,843 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-05 22:17:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:34,844 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-05 22:17:34,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-05 22:17:34,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:34,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:34,844 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:35,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-05 22:17:35,045 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:35,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:35,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-10-05 22:17:35,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:35,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809626109] [2020-10-05 22:17:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:35,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809626109] [2020-10-05 22:17:35,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361942144] [2020-10-05 22:17:35,124 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:35,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:35,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:35,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:35,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:35,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:35,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:35,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116111798] [2020-10-05 22:17:35,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:35,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:35,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:35,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:35,260 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-05 22:17:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:35,347 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-05 22:17:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:35,348 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:35,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:35,349 INFO L225 Difference]: With dead ends: 148 [2020-10-05 22:17:35,349 INFO L226 Difference]: Without dead ends: 146 [2020-10-05 22:17:35,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-05 22:17:35,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-05 22:17:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-05 22:17:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-05 22:17:35,353 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-05 22:17:35,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:35,353 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-05 22:17:35,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:35,353 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-05 22:17:35,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:35,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:35,354 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:35,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-05 22:17:35,556 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:35,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-10-05 22:17:35,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:35,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376591686] [2020-10-05 22:17:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:35,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376591686] [2020-10-05 22:17:35,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832765] [2020-10-05 22:17:35,631 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:35,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:35,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:35,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:35,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:35,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:35,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:35,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335480399] [2020-10-05 22:17:35,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:35,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:35,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:35,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:35,767 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-05 22:17:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:35,921 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-05 22:17:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:35,921 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:35,922 INFO L225 Difference]: With dead ends: 157 [2020-10-05 22:17:35,922 INFO L226 Difference]: Without dead ends: 155 [2020-10-05 22:17:35,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:17:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-05 22:17:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-05 22:17:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-05 22:17:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-05 22:17:35,926 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-05 22:17:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:35,926 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-05 22:17:35,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-05 22:17:35,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:35,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:35,927 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:36,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:36,136 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:36,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:36,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-10-05 22:17:36,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:36,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391779964] [2020-10-05 22:17:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:36,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391779964] [2020-10-05 22:17:36,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541436646] [2020-10-05 22:17:36,202 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:36,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:36,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:36,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:17:36,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:36,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:36,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 22:17:36,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276038999] [2020-10-05 22:17:36,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:17:36,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:36,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:17:36,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:17:36,276 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-10-05 22:17:36,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:36,382 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-05 22:17:36,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:36,383 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 22:17:36,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:36,384 INFO L225 Difference]: With dead ends: 149 [2020-10-05 22:17:36,384 INFO L226 Difference]: Without dead ends: 147 [2020-10-05 22:17:36,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:17:36,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-05 22:17:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-05 22:17:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-05 22:17:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-05 22:17:36,389 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-05 22:17:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:36,389 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-05 22:17:36,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:17:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-05 22:17:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:36,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:36,390 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:36,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-05 22:17:36,599 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:36,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:36,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-10-05 22:17:36,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:36,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522851592] [2020-10-05 22:17:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:36,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522851592] [2020-10-05 22:17:36,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155659034] [2020-10-05 22:17:36,654 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:36,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:36,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:36,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:36,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:36,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:36,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682793069] [2020-10-05 22:17:36,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:36,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:36,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:36,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:36,809 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-05 22:17:37,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:37,051 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-05 22:17:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:37,051 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:37,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:37,052 INFO L225 Difference]: With dead ends: 164 [2020-10-05 22:17:37,053 INFO L226 Difference]: Without dead ends: 159 [2020-10-05 22:17:37,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:37,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-05 22:17:37,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-05 22:17:37,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-05 22:17:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-05 22:17:37,057 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-05 22:17:37,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:37,057 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-05 22:17:37,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:37,057 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-05 22:17:37,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:37,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:37,058 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:37,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-05 22:17:37,259 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:37,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:37,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-10-05 22:17:37,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:37,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786088471] [2020-10-05 22:17:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:37,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786088471] [2020-10-05 22:17:37,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279970568] [2020-10-05 22:17:37,317 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:37,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:37,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:37,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:37,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:37,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:37,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:37,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659264082] [2020-10-05 22:17:37,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:37,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:37,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:37,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:37,474 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-05 22:17:37,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:37,663 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-05 22:17:37,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:17:37,664 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:37,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:37,665 INFO L225 Difference]: With dead ends: 156 [2020-10-05 22:17:37,665 INFO L226 Difference]: Without dead ends: 154 [2020-10-05 22:17:37,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:17:37,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-05 22:17:37,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-05 22:17:37,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-05 22:17:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-05 22:17:37,671 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-05 22:17:37,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:37,671 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-05 22:17:37,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-05 22:17:37,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:37,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:37,674 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:37,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:37,883 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:37,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:37,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-10-05 22:17:37,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:37,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714290562] [2020-10-05 22:17:37,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:37,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714290562] [2020-10-05 22:17:37,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720580189] [2020-10-05 22:17:37,938 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:37,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:37,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:37,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:37,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:38,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:38,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:38,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:38,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623419072] [2020-10-05 22:17:38,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:38,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:38,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:38,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:38,106 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-05 22:17:38,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:38,453 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-05 22:17:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:17:38,454 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:38,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:38,455 INFO L225 Difference]: With dead ends: 176 [2020-10-05 22:17:38,456 INFO L226 Difference]: Without dead ends: 171 [2020-10-05 22:17:38,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:17:38,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-05 22:17:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-05 22:17:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-05 22:17:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-05 22:17:38,460 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-05 22:17:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:38,460 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-05 22:17:38,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-05 22:17:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:38,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:38,461 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:38,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-05 22:17:38,672 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:38,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-10-05 22:17:38,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:38,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416798237] [2020-10-05 22:17:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:38,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416798237] [2020-10-05 22:17:38,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819525005] [2020-10-05 22:17:38,745 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:38,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:38,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:38,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:38,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:38,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:38,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:38,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:38,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342089462] [2020-10-05 22:17:38,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:38,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:38,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:38,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:38,894 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-05 22:17:39,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:39,103 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-05 22:17:39,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:39,103 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:39,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:39,104 INFO L225 Difference]: With dead ends: 166 [2020-10-05 22:17:39,104 INFO L226 Difference]: Without dead ends: 161 [2020-10-05 22:17:39,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:39,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-05 22:17:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-05 22:17:39,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-05 22:17:39,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-05 22:17:39,108 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-05 22:17:39,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:39,108 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-05 22:17:39,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:39,108 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-05 22:17:39,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:39,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:39,109 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:39,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:39,318 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:39,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-10-05 22:17:39,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:39,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148193060] [2020-10-05 22:17:39,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:39,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148193060] [2020-10-05 22:17:39,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603084585] [2020-10-05 22:17:39,374 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:39,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:39,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:39,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:39,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:39,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:39,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:39,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216855381] [2020-10-05 22:17:39,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:39,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:39,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:39,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:39,531 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-05 22:17:39,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:39,705 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-05 22:17:39,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:39,706 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:39,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:39,707 INFO L225 Difference]: With dead ends: 163 [2020-10-05 22:17:39,707 INFO L226 Difference]: Without dead ends: 161 [2020-10-05 22:17:39,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:17:39,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-05 22:17:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-05 22:17:39,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-05 22:17:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-05 22:17:39,710 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-05 22:17:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:39,710 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-05 22:17:39,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-05 22:17:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:39,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:39,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:39,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-05 22:17:39,920 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:39,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:39,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-10-05 22:17:39,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:39,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51423610] [2020-10-05 22:17:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:39,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:39,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51423610] [2020-10-05 22:17:39,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470360724] [2020-10-05 22:17:39,985 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:40,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:40,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:40,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:40,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:40,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:40,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:40,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017193312] [2020-10-05 22:17:40,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:40,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:40,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:40,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:40,173 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-05 22:17:40,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:40,407 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-05 22:17:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:17:40,408 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:40,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:40,409 INFO L225 Difference]: With dead ends: 170 [2020-10-05 22:17:40,409 INFO L226 Difference]: Without dead ends: 168 [2020-10-05 22:17:40,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:17:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-05 22:17:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-05 22:17:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-05 22:17:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-05 22:17:40,412 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-05 22:17:40,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:40,412 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-05 22:17:40,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-05 22:17:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:40,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:40,413 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:40,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:40,622 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:40,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-10-05 22:17:40,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:40,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205214522] [2020-10-05 22:17:40,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:40,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205214522] [2020-10-05 22:17:40,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441657498] [2020-10-05 22:17:40,677 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:40,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:40,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:40,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:40,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:40,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:40,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078143307] [2020-10-05 22:17:40,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:40,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:40,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:40,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:40,797 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-05 22:17:41,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:41,116 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-05 22:17:41,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:17:41,117 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:41,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:41,118 INFO L225 Difference]: With dead ends: 177 [2020-10-05 22:17:41,118 INFO L226 Difference]: Without dead ends: 172 [2020-10-05 22:17:41,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:17:41,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-05 22:17:41,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-05 22:17:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-05 22:17:41,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-05 22:17:41,123 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-05 22:17:41,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:41,123 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-05 22:17:41,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:41,124 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-05 22:17:41,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:41,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:41,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:41,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-05 22:17:41,337 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-10-05 22:17:41,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:41,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628556777] [2020-10-05 22:17:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:41,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628556777] [2020-10-05 22:17:41,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065446171] [2020-10-05 22:17:41,397 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:41,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:41,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:41,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:41,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:41,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:41,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:41,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:41,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35530328] [2020-10-05 22:17:41,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:41,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:41,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:41,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:41,514 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-05 22:17:41,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:41,892 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-05 22:17:41,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:17:41,892 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:41,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:41,894 INFO L225 Difference]: With dead ends: 190 [2020-10-05 22:17:41,894 INFO L226 Difference]: Without dead ends: 182 [2020-10-05 22:17:41,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:17:41,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-05 22:17:41,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-05 22:17:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-05 22:17:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-05 22:17:41,898 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-05 22:17:41,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:41,898 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-05 22:17:41,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:41,898 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-05 22:17:41,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:41,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:41,899 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:42,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-05 22:17:42,100 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:42,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:42,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-10-05 22:17:42,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:42,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127928196] [2020-10-05 22:17:42,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:42,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127928196] [2020-10-05 22:17:42,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401946029] [2020-10-05 22:17:42,157 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:42,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:17:42,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:42,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:42,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:42,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:42,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:42,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:42,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749714289] [2020-10-05 22:17:42,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:42,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:42,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:42,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:42,279 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-05 22:17:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:42,628 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-05 22:17:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:17:42,628 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:42,630 INFO L225 Difference]: With dead ends: 180 [2020-10-05 22:17:42,630 INFO L226 Difference]: Without dead ends: 175 [2020-10-05 22:17:42,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:17:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-05 22:17:42,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-05 22:17:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-05 22:17:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-05 22:17:42,635 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-05 22:17:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:42,635 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-05 22:17:42,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:42,635 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-05 22:17:42,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:42,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:42,636 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:42,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-05 22:17:42,849 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:42,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-10-05 22:17:42,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:42,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410847579] [2020-10-05 22:17:42,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:42,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410847579] [2020-10-05 22:17:42,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723940622] [2020-10-05 22:17:42,911 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:42,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:42,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:42,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:42,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:43,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:43,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:43,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425860902] [2020-10-05 22:17:43,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:43,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:43,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:43,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:43,090 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-05 22:17:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:43,274 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-05 22:17:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:43,274 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:43,275 INFO L225 Difference]: With dead ends: 164 [2020-10-05 22:17:43,276 INFO L226 Difference]: Without dead ends: 162 [2020-10-05 22:17:43,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:17:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-05 22:17:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-05 22:17:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-05 22:17:43,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-05 22:17:43,280 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-05 22:17:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:43,280 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-05 22:17:43,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-05 22:17:43,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:43,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:43,281 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:43,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-05 22:17:43,491 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:43,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:43,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-10-05 22:17:43,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:43,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456970220] [2020-10-05 22:17:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:43,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456970220] [2020-10-05 22:17:43,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678429218] [2020-10-05 22:17:43,558 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:43,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:43,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:43,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:43,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:43,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:43,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:43,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931976374] [2020-10-05 22:17:43,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:43,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:43,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:43,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:43,688 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-05 22:17:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:43,844 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-05 22:17:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:17:43,844 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:43,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:43,846 INFO L225 Difference]: With dead ends: 161 [2020-10-05 22:17:43,846 INFO L226 Difference]: Without dead ends: 159 [2020-10-05 22:17:43,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:17:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-05 22:17:43,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-05 22:17:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-05 22:17:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-05 22:17:43,849 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-05 22:17:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:43,850 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-05 22:17:43,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-05 22:17:43,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:43,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:43,851 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:44,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-05 22:17:44,053 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:44,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-10-05 22:17:44,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:44,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421344644] [2020-10-05 22:17:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:44,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421344644] [2020-10-05 22:17:44,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33609435] [2020-10-05 22:17:44,107 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:44,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:17:44,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:44,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:44,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:44,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:44,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:44,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186547034] [2020-10-05 22:17:44,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:44,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:44,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:44,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:44,270 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-05 22:17:44,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:44,451 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-05 22:17:44,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:17:44,452 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:44,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:44,453 INFO L225 Difference]: With dead ends: 165 [2020-10-05 22:17:44,453 INFO L226 Difference]: Without dead ends: 163 [2020-10-05 22:17:44,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:17:44,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-05 22:17:44,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-05 22:17:44,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-05 22:17:44,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-05 22:17:44,457 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-05 22:17:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:44,458 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-05 22:17:44,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-05 22:17:44,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:44,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:44,458 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:44,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-05 22:17:44,659 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:44,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:44,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-10-05 22:17:44,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:44,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22859436] [2020-10-05 22:17:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:44,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22859436] [2020-10-05 22:17:44,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501567698] [2020-10-05 22:17:44,714 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:44,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:44,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:44,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:44,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:44,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035802240] [2020-10-05 22:17:44,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:44,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:44,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:44,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:44,848 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-05 22:17:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:45,056 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-05 22:17:45,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:17:45,056 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:45,057 INFO L225 Difference]: With dead ends: 167 [2020-10-05 22:17:45,057 INFO L226 Difference]: Without dead ends: 165 [2020-10-05 22:17:45,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:17:45,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-05 22:17:45,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-05 22:17:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-05 22:17:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-05 22:17:45,060 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-05 22:17:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:45,060 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-05 22:17:45,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-05 22:17:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:45,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:45,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:45,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:45,269 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:45,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:45,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-10-05 22:17:45,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:45,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612790710] [2020-10-05 22:17:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:45,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612790710] [2020-10-05 22:17:45,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749288954] [2020-10-05 22:17:45,328 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:45,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:45,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:45,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:45,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:45,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:45,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157084700] [2020-10-05 22:17:45,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:45,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:45,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:45,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:45,465 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-05 22:17:45,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:45,737 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-05 22:17:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:17:45,738 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:45,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:45,739 INFO L225 Difference]: With dead ends: 168 [2020-10-05 22:17:45,739 INFO L226 Difference]: Without dead ends: 166 [2020-10-05 22:17:45,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:17:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-05 22:17:45,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-05 22:17:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-05 22:17:45,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-05 22:17:45,743 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-05 22:17:45,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:45,744 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-05 22:17:45,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:45,744 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-05 22:17:45,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:45,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:45,744 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:45,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:45,945 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:45,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-10-05 22:17:45,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:45,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681886655] [2020-10-05 22:17:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:46,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681886655] [2020-10-05 22:17:46,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585765670] [2020-10-05 22:17:46,002 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:46,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:46,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:46,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:46,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:46,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:46,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:46,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:46,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129889667] [2020-10-05 22:17:46,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:46,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:46,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:46,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:46,123 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-05 22:17:46,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:46,322 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-05 22:17:46,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:46,322 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:46,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:46,324 INFO L225 Difference]: With dead ends: 160 [2020-10-05 22:17:46,324 INFO L226 Difference]: Without dead ends: 155 [2020-10-05 22:17:46,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:46,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-05 22:17:46,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-05 22:17:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-05 22:17:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-05 22:17:46,328 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-05 22:17:46,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:46,329 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-05 22:17:46,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-05 22:17:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:46,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:46,330 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:46,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:46,542 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:46,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:46,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-10-05 22:17:46,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:46,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998512871] [2020-10-05 22:17:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:46,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998512871] [2020-10-05 22:17:46,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932711521] [2020-10-05 22:17:46,599 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:46,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:46,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:46,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:46,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:46,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:46,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:46,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:46,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248883253] [2020-10-05 22:17:46,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:46,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:46,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:46,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:46,819 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-05 22:17:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:47,241 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-05 22:17:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:17:47,242 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:47,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:47,243 INFO L225 Difference]: With dead ends: 189 [2020-10-05 22:17:47,244 INFO L226 Difference]: Without dead ends: 181 [2020-10-05 22:17:47,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:17:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-05 22:17:47,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-05 22:17:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-05 22:17:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-05 22:17:47,248 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-05 22:17:47,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:47,248 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-05 22:17:47,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:47,248 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-05 22:17:47,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:47,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:47,249 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:47,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:47,458 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:47,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-10-05 22:17:47,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:47,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590947034] [2020-10-05 22:17:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:47,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590947034] [2020-10-05 22:17:47,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349820567] [2020-10-05 22:17:47,514 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:47,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:47,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:47,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:47,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:47,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:47,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:47,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443505105] [2020-10-05 22:17:47,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:47,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:47,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:47,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:47,644 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-05 22:17:47,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:47,897 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-05 22:17:47,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:17:47,898 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:47,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:47,900 INFO L225 Difference]: With dead ends: 169 [2020-10-05 22:17:47,900 INFO L226 Difference]: Without dead ends: 167 [2020-10-05 22:17:47,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:17:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-05 22:17:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-05 22:17:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-05 22:17:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-05 22:17:47,904 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-05 22:17:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:47,904 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-05 22:17:47,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-05 22:17:47,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:47,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:47,905 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:48,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-05 22:17:48,106 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:48,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:48,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-10-05 22:17:48,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:48,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147350596] [2020-10-05 22:17:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:48,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147350596] [2020-10-05 22:17:48,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298355671] [2020-10-05 22:17:48,166 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:48,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:48,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:48,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:48,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:48,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:48,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:48,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:48,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256201984] [2020-10-05 22:17:48,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:48,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:48,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:48,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:48,286 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-05 22:17:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:48,626 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-05 22:17:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:17:48,627 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:48,629 INFO L225 Difference]: With dead ends: 192 [2020-10-05 22:17:48,629 INFO L226 Difference]: Without dead ends: 184 [2020-10-05 22:17:48,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:17:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-05 22:17:48,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-05 22:17:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-05 22:17:48,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-05 22:17:48,632 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-05 22:17:48,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:48,633 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-05 22:17:48,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:48,633 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-05 22:17:48,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:48,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:48,633 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:48,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:48,834 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:48,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:48,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-10-05 22:17:48,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:48,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819586099] [2020-10-05 22:17:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:48,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819586099] [2020-10-05 22:17:48,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620552676] [2020-10-05 22:17:48,887 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:48,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:48,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:48,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:49,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:49,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:49,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456310913] [2020-10-05 22:17:49,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:49,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:49,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:49,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:49,005 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-05 22:17:49,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:49,346 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-05 22:17:49,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:17:49,347 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:49,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:49,348 INFO L225 Difference]: With dead ends: 180 [2020-10-05 22:17:49,349 INFO L226 Difference]: Without dead ends: 175 [2020-10-05 22:17:49,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:17:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-05 22:17:49,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-05 22:17:49,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-05 22:17:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-05 22:17:49,352 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-05 22:17:49,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:49,353 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-05 22:17:49,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:49,353 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-05 22:17:49,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:49,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:49,353 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:49,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-05 22:17:49,557 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-10-05 22:17:49,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:49,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171629250] [2020-10-05 22:17:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:49,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171629250] [2020-10-05 22:17:49,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719618309] [2020-10-05 22:17:49,626 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:49,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:17:49,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:49,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:49,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:49,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:49,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:49,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-05 22:17:49,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270715501] [2020-10-05 22:17:49,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:17:49,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:17:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:17:49,799 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-05 22:17:49,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:49,953 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-05 22:17:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:17:49,953 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-05 22:17:49,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:49,955 INFO L225 Difference]: With dead ends: 164 [2020-10-05 22:17:49,955 INFO L226 Difference]: Without dead ends: 159 [2020-10-05 22:17:49,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:17:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-05 22:17:49,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-05 22:17:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-05 22:17:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-05 22:17:49,959 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-05 22:17:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:49,959 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-05 22:17:49,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:17:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-05 22:17:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:49,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:49,960 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:50,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:50,164 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:50,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-10-05 22:17:50,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:50,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106018391] [2020-10-05 22:17:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:50,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106018391] [2020-10-05 22:17:50,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608467669] [2020-10-05 22:17:50,274 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:50,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:17:50,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:50,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:50,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:50,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:50,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:50,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149234061] [2020-10-05 22:17:50,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:50,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:50,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:50,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:50,458 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-05 22:17:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:50,503 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-05 22:17:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:50,504 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-05 22:17:50,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:50,505 INFO L225 Difference]: With dead ends: 156 [2020-10-05 22:17:50,505 INFO L226 Difference]: Without dead ends: 153 [2020-10-05 22:17:50,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-05 22:17:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-05 22:17:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-05 22:17:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-05 22:17:50,509 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-05 22:17:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:50,509 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-05 22:17:50,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-05 22:17:50,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:50,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:50,510 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:50,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-05 22:17:50,718 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:50,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:50,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-10-05 22:17:50,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:50,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596320765] [2020-10-05 22:17:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:50,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596320765] [2020-10-05 22:17:50,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290313016] [2020-10-05 22:17:50,818 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:50,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:50,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:50,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:50,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:50,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:50,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:50,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985020652] [2020-10-05 22:17:50,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:50,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:50,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:50,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:50,990 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-05 22:17:51,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:51,067 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-05 22:17:51,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:51,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-05 22:17:51,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:51,069 INFO L225 Difference]: With dead ends: 170 [2020-10-05 22:17:51,069 INFO L226 Difference]: Without dead ends: 167 [2020-10-05 22:17:51,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:17:51,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-05 22:17:51,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-05 22:17:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-05 22:17:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-05 22:17:51,073 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-05 22:17:51,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:51,075 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-05 22:17:51,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:51,075 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-05 22:17:51,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:51,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:51,076 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:51,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:51,286 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:51,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:51,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-10-05 22:17:51,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:51,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843625777] [2020-10-05 22:17:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:51,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843625777] [2020-10-05 22:17:51,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054042370] [2020-10-05 22:17:51,375 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:51,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:17:51,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:51,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:51,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:51,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:51,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:51,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296218093] [2020-10-05 22:17:51,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:51,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:51,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:51,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:51,539 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-05 22:17:51,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:51,628 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-05 22:17:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:51,629 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-05 22:17:51,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:51,630 INFO L225 Difference]: With dead ends: 169 [2020-10-05 22:17:51,630 INFO L226 Difference]: Without dead ends: 166 [2020-10-05 22:17:51,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:51,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-05 22:17:51,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-05 22:17:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-05 22:17:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-05 22:17:51,634 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-05 22:17:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:51,634 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-05 22:17:51,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:51,634 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-05 22:17:51,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:51,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:51,635 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:51,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:51,842 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:51,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:51,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-10-05 22:17:51,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:51,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716726197] [2020-10-05 22:17:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:51,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716726197] [2020-10-05 22:17:51,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403898789] [2020-10-05 22:17:51,940 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:51,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:17:51,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:51,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:51,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:52,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:52,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:52,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206023732] [2020-10-05 22:17:52,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:52,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:52,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:52,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:52,099 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-05 22:17:52,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:52,201 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-05 22:17:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:17:52,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-05 22:17:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:52,203 INFO L225 Difference]: With dead ends: 168 [2020-10-05 22:17:52,204 INFO L226 Difference]: Without dead ends: 165 [2020-10-05 22:17:52,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:17:52,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-05 22:17:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-05 22:17:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-05 22:17:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-05 22:17:52,210 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-05 22:17:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:52,210 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-05 22:17:52,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-05 22:17:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:52,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:52,211 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:52,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-05 22:17:52,421 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:52,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-10-05 22:17:52,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:52,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866499511] [2020-10-05 22:17:52,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:52,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866499511] [2020-10-05 22:17:52,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402844055] [2020-10-05 22:17:52,492 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:52,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:52,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:52,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:52,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:52,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670045069] [2020-10-05 22:17:52,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:52,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:52,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:52,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:52,656 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-05 22:17:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:52,794 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-05 22:17:52,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:52,794 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-05 22:17:52,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:52,796 INFO L225 Difference]: With dead ends: 167 [2020-10-05 22:17:52,796 INFO L226 Difference]: Without dead ends: 164 [2020-10-05 22:17:52,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:17:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-05 22:17:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-05 22:17:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-05 22:17:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-05 22:17:52,801 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-05 22:17:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:52,801 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-05 22:17:52,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-05 22:17:52,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:52,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:52,802 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:53,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:53,004 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:53,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:53,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-10-05 22:17:53,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:53,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520394158] [2020-10-05 22:17:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:53,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520394158] [2020-10-05 22:17:53,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946272254] [2020-10-05 22:17:53,078 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:53,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:53,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:53,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:53,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:53,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:53,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:53,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:53,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680763283] [2020-10-05 22:17:53,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:53,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:53,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:53,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:53,255 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-05 22:17:53,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:53,454 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-05 22:17:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:17:53,454 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-05 22:17:53,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:53,456 INFO L225 Difference]: With dead ends: 176 [2020-10-05 22:17:53,456 INFO L226 Difference]: Without dead ends: 170 [2020-10-05 22:17:53,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-05 22:17:53,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-05 22:17:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-05 22:17:53,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-05 22:17:53,459 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-05 22:17:53,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:53,459 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-05 22:17:53,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-05 22:17:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:53,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:53,460 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:53,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:53,661 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:53,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-10-05 22:17:53,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:53,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907591673] [2020-10-05 22:17:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:53,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907591673] [2020-10-05 22:17:53,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562315532] [2020-10-05 22:17:53,747 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:53,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:53,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:53,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:53,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:53,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:53,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:53,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489946358] [2020-10-05 22:17:53,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:53,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:53,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:53,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:53,912 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-05 22:17:53,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:53,966 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-05 22:17:53,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:53,967 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:53,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:53,968 INFO L225 Difference]: With dead ends: 163 [2020-10-05 22:17:53,968 INFO L226 Difference]: Without dead ends: 161 [2020-10-05 22:17:53,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-05 22:17:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-05 22:17:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-05 22:17:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-05 22:17:53,972 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-05 22:17:53,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:53,973 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-05 22:17:53,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-05 22:17:53,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:53,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:53,973 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:54,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-05 22:17:54,174 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:54,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:54,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-10-05 22:17:54,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:54,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902183887] [2020-10-05 22:17:54,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:54,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902183887] [2020-10-05 22:17:54,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208402965] [2020-10-05 22:17:54,258 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:54,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:54,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:54,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:54,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:54,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:54,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:54,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302909295] [2020-10-05 22:17:54,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:54,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:54,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:54,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:54,426 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-05 22:17:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:54,574 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-05 22:17:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:54,575 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:54,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:54,576 INFO L225 Difference]: With dead ends: 172 [2020-10-05 22:17:54,576 INFO L226 Difference]: Without dead ends: 170 [2020-10-05 22:17:54,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:17:54,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-05 22:17:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-05 22:17:54,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-05 22:17:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-05 22:17:54,580 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-05 22:17:54,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:54,580 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-05 22:17:54,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:54,581 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-05 22:17:54,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:54,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:54,581 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:54,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:54,787 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:54,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:54,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-10-05 22:17:54,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:54,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987199823] [2020-10-05 22:17:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:54,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987199823] [2020-10-05 22:17:54,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174623982] [2020-10-05 22:17:54,863 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:54,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:54,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:54,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:54,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:55,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:55,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:55,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557541092] [2020-10-05 22:17:55,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:55,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:55,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:55,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:55,654 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-05 22:17:55,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:55,865 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-05 22:17:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:55,866 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:55,867 INFO L225 Difference]: With dead ends: 179 [2020-10-05 22:17:55,868 INFO L226 Difference]: Without dead ends: 177 [2020-10-05 22:17:55,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:17:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-05 22:17:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-05 22:17:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-05 22:17:55,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-05 22:17:55,872 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-05 22:17:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:55,872 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-05 22:17:55,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-05 22:17:55,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:55,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:55,872 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:56,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-05 22:17:56,074 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:56,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:56,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-10-05 22:17:56,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:56,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150055480] [2020-10-05 22:17:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:56,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150055480] [2020-10-05 22:17:56,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020145464] [2020-10-05 22:17:56,162 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:56,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:56,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:56,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:56,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:56,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:56,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:56,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458040540] [2020-10-05 22:17:56,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:56,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:56,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:56,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:56,333 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-05 22:17:56,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:56,518 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-05 22:17:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:17:56,519 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:56,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:56,520 INFO L225 Difference]: With dead ends: 179 [2020-10-05 22:17:56,520 INFO L226 Difference]: Without dead ends: 177 [2020-10-05 22:17:56,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:56,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-05 22:17:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-05 22:17:56,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-05 22:17:56,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-05 22:17:56,524 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-05 22:17:56,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:56,524 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-05 22:17:56,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-05 22:17:56,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:56,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:56,525 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:56,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-05 22:17:56,729 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:56,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-10-05 22:17:56,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:56,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25027294] [2020-10-05 22:17:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:56,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25027294] [2020-10-05 22:17:56,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518450731] [2020-10-05 22:17:56,807 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:56,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:56,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:56,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:56,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:56,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:56,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:56,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206059025] [2020-10-05 22:17:56,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:56,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:56,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:56,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:56,955 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-05 22:17:57,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:57,161 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-05 22:17:57,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:57,162 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:57,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:57,163 INFO L225 Difference]: With dead ends: 184 [2020-10-05 22:17:57,164 INFO L226 Difference]: Without dead ends: 182 [2020-10-05 22:17:57,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-05 22:17:57,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-05 22:17:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-05 22:17:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-05 22:17:57,169 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-05 22:17:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:57,170 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-05 22:17:57,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:57,170 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-05 22:17:57,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:57,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:57,171 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:57,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-05 22:17:57,385 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:57,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:57,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-10-05 22:17:57,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:57,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993637597] [2020-10-05 22:17:57,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:57,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993637597] [2020-10-05 22:17:57,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709437662] [2020-10-05 22:17:57,505 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:57,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:57,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:57,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:57,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:57,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680954860] [2020-10-05 22:17:57,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:57,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:57,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:57,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:57,757 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-05 22:17:58,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:58,086 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-05 22:17:58,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:58,087 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:58,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:58,089 INFO L225 Difference]: With dead ends: 179 [2020-10-05 22:17:58,089 INFO L226 Difference]: Without dead ends: 177 [2020-10-05 22:17:58,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:58,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-05 22:17:58,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-05 22:17:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-05 22:17:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-05 22:17:58,095 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-05 22:17:58,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:58,095 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-05 22:17:58,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:58,095 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-05 22:17:58,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:58,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:58,096 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:58,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:58,310 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:58,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:58,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-10-05 22:17:58,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:58,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850380173] [2020-10-05 22:17:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:58,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850380173] [2020-10-05 22:17:58,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522651560] [2020-10-05 22:17:58,390 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:58,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:58,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:58,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:58,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:58,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:58,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:58,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291403494] [2020-10-05 22:17:58,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:58,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:58,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:58,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:58,557 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-05 22:17:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:58,722 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-05 22:17:58,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:58,723 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:58,725 INFO L225 Difference]: With dead ends: 176 [2020-10-05 22:17:58,725 INFO L226 Difference]: Without dead ends: 174 [2020-10-05 22:17:58,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:17:58,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-05 22:17:58,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-05 22:17:58,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-05 22:17:58,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-05 22:17:58,728 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-05 22:17:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:58,728 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-05 22:17:58,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:58,729 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-05 22:17:58,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:58,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:58,729 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:58,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:58,930 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:58,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:58,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-10-05 22:17:58,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:58,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882441948] [2020-10-05 22:17:58,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:59,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882441948] [2020-10-05 22:17:59,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392885284] [2020-10-05 22:17:59,024 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:59,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:17:59,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:59,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:59,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:59,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:59,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:59,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489110526] [2020-10-05 22:17:59,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:59,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:59,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:59,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:59,191 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-05 22:17:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:59,410 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-05 22:17:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:59,411 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:59,412 INFO L225 Difference]: With dead ends: 185 [2020-10-05 22:17:59,412 INFO L226 Difference]: Without dead ends: 183 [2020-10-05 22:17:59,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:59,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-05 22:17:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-05 22:17:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-05 22:17:59,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-05 22:17:59,416 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-05 22:17:59,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:59,417 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-05 22:17:59,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:59,417 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-05 22:17:59,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:59,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:59,418 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:59,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:59,619 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:59,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:59,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-10-05 22:17:59,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:59,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581703324] [2020-10-05 22:17:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:59,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581703324] [2020-10-05 22:17:59,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512093253] [2020-10-05 22:17:59,741 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:59,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:59,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:59,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:59,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:59,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:59,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:59,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244210352] [2020-10-05 22:17:59,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:59,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:59,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:59,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:59,927 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-05 22:18:00,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:00,134 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-05 22:18:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:18:00,135 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:00,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:00,136 INFO L225 Difference]: With dead ends: 185 [2020-10-05 22:18:00,136 INFO L226 Difference]: Without dead ends: 183 [2020-10-05 22:18:00,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:18:00,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-05 22:18:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-05 22:18:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-05 22:18:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-05 22:18:00,140 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-05 22:18:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:00,140 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-05 22:18:00,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-05 22:18:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:00,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:00,141 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:00,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:00,342 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:00,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-10-05 22:18:00,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:00,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115453160] [2020-10-05 22:18:00,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:00,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115453160] [2020-10-05 22:18:00,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85907900] [2020-10-05 22:18:00,503 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:00,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:18:00,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:00,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:00,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:00,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:00,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:00,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948640510] [2020-10-05 22:18:00,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:00,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:00,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:00,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:00,678 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-05 22:18:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:00,744 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-05 22:18:00,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:18:00,744 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:00,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:00,746 INFO L225 Difference]: With dead ends: 182 [2020-10-05 22:18:00,746 INFO L226 Difference]: Without dead ends: 180 [2020-10-05 22:18:00,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:18:00,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-05 22:18:00,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-05 22:18:00,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-05 22:18:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-05 22:18:00,749 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-05 22:18:00,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:00,749 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-05 22:18:00,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:00,750 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-05 22:18:00,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:00,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:00,750 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:00,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-05 22:18:00,954 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:00,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:00,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-10-05 22:18:00,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:00,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583797391] [2020-10-05 22:18:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:01,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583797391] [2020-10-05 22:18:01,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722216249] [2020-10-05 22:18:01,064 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:01,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:18:01,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:01,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:01,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:01,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:01,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958944222] [2020-10-05 22:18:01,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:01,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:01,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:01,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:01,230 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-05 22:18:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:01,409 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-05 22:18:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:18:01,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:01,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:01,411 INFO L225 Difference]: With dead ends: 185 [2020-10-05 22:18:01,411 INFO L226 Difference]: Without dead ends: 183 [2020-10-05 22:18:01,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:18:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-05 22:18:01,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-05 22:18:01,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:18:01,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-05 22:18:01,415 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-05 22:18:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:01,416 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-05 22:18:01,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-05 22:18:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:01,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:01,417 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:01,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:01,627 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:01,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:01,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-10-05 22:18:01,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:01,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442471] [2020-10-05 22:18:01,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:01,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442471] [2020-10-05 22:18:01,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895781984] [2020-10-05 22:18:01,729 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:01,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:01,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:02,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:02,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:02,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65668762] [2020-10-05 22:18:02,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:02,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:02,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:02,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:02,400 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-05 22:18:02,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:02,628 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-05 22:18:02,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:18:02,629 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:02,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:02,630 INFO L225 Difference]: With dead ends: 191 [2020-10-05 22:18:02,631 INFO L226 Difference]: Without dead ends: 189 [2020-10-05 22:18:02,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:18:02,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-05 22:18:02,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-05 22:18:02,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-05 22:18:02,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-05 22:18:02,634 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-05 22:18:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:02,634 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-05 22:18:02,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-05 22:18:02,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:02,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:02,635 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:02,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:02,836 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:02,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:02,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-10-05 22:18:02,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:02,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613961865] [2020-10-05 22:18:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:02,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613961865] [2020-10-05 22:18:02,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115644452] [2020-10-05 22:18:02,920 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:02,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:18:02,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:02,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:02,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:03,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:03,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:03,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894720084] [2020-10-05 22:18:03,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:03,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:03,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:03,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:03,089 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-05 22:18:03,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:03,344 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-05 22:18:03,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:03,344 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:03,346 INFO L225 Difference]: With dead ends: 187 [2020-10-05 22:18:03,347 INFO L226 Difference]: Without dead ends: 185 [2020-10-05 22:18:03,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:03,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-05 22:18:03,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-05 22:18:03,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:18:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-05 22:18:03,351 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-05 22:18:03,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:03,351 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-05 22:18:03,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:03,351 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-05 22:18:03,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:03,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:03,352 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:03,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-05 22:18:03,563 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:03,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:03,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-10-05 22:18:03,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:03,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011325621] [2020-10-05 22:18:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:03,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011325621] [2020-10-05 22:18:03,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305969453] [2020-10-05 22:18:03,647 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:03,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:18:03,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:03,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:03,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:03,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:03,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:03,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742577885] [2020-10-05 22:18:03,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:03,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:03,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:03,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:03,806 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-05 22:18:04,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:04,057 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-05 22:18:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:18:04,059 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:04,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:04,060 INFO L225 Difference]: With dead ends: 198 [2020-10-05 22:18:04,060 INFO L226 Difference]: Without dead ends: 196 [2020-10-05 22:18:04,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:04,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-05 22:18:04,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-05 22:18:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:18:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-05 22:18:04,064 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-05 22:18:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:04,064 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-05 22:18:04,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-05 22:18:04,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:04,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:04,065 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:04,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:04,266 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:04,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:04,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-10-05 22:18:04,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:04,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542141945] [2020-10-05 22:18:04,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:04,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542141945] [2020-10-05 22:18:04,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567479572] [2020-10-05 22:18:04,349 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:04,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:18:04,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:04,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:04,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:04,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:04,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:04,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228857969] [2020-10-05 22:18:04,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:04,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:04,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:04,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:04,522 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-05 22:18:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:04,799 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-05 22:18:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:18:04,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:04,801 INFO L225 Difference]: With dead ends: 189 [2020-10-05 22:18:04,801 INFO L226 Difference]: Without dead ends: 187 [2020-10-05 22:18:04,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:04,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-05 22:18:04,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-05 22:18:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-05 22:18:04,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-05 22:18:04,805 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-05 22:18:04,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:04,805 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-05 22:18:04,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-05 22:18:04,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:04,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:04,806 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:05,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-05 22:18:05,007 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:05,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:05,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-10-05 22:18:05,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:05,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929537165] [2020-10-05 22:18:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:05,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929537165] [2020-10-05 22:18:05,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053138170] [2020-10-05 22:18:05,120 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:05,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:18:05,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:05,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:05,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:05,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:05,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:05,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189196060] [2020-10-05 22:18:05,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:05,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:05,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:05,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:05,281 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-05 22:18:05,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:05,378 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-05 22:18:05,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:18:05,379 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:05,380 INFO L225 Difference]: With dead ends: 178 [2020-10-05 22:18:05,380 INFO L226 Difference]: Without dead ends: 176 [2020-10-05 22:18:05,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:18:05,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-05 22:18:05,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-05 22:18:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-05 22:18:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-05 22:18:05,384 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-05 22:18:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:05,384 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-05 22:18:05,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:05,385 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-05 22:18:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:05,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:05,385 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:05,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:05,586 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:05,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:05,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-10-05 22:18:05,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:05,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793057781] [2020-10-05 22:18:05,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:05,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793057781] [2020-10-05 22:18:05,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190339285] [2020-10-05 22:18:05,685 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:05,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:18:05,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:05,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:05,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:05,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:05,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:05,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820770092] [2020-10-05 22:18:05,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:05,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:05,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:05,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:05,851 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-05 22:18:06,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:06,048 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-05 22:18:06,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:06,049 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:06,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:06,050 INFO L225 Difference]: With dead ends: 193 [2020-10-05 22:18:06,051 INFO L226 Difference]: Without dead ends: 191 [2020-10-05 22:18:06,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:18:06,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-05 22:18:06,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-05 22:18:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-05 22:18:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-05 22:18:06,054 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-05 22:18:06,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:06,054 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-05 22:18:06,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-05 22:18:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:06,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:06,054 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:06,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-05 22:18:06,257 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:06,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-10-05 22:18:06,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:06,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44889247] [2020-10-05 22:18:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:06,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44889247] [2020-10-05 22:18:06,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907775533] [2020-10-05 22:18:06,341 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:06,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:06,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:06,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:06,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:06,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002834299] [2020-10-05 22:18:06,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:06,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:06,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:06,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:06,553 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-05 22:18:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:06,805 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-05 22:18:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:06,806 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:06,808 INFO L225 Difference]: With dead ends: 195 [2020-10-05 22:18:06,808 INFO L226 Difference]: Without dead ends: 193 [2020-10-05 22:18:06,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:18:06,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-05 22:18:06,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-05 22:18:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-05 22:18:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-05 22:18:06,811 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-05 22:18:06,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:06,811 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-05 22:18:06,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:06,811 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-05 22:18:06,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:06,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:06,812 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:07,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:07,013 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:07,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-10-05 22:18:07,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:07,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076282746] [2020-10-05 22:18:07,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:07,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076282746] [2020-10-05 22:18:07,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317914768] [2020-10-05 22:18:07,126 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:07,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:18:07,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:07,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:07,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:07,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:07,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:07,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127230181] [2020-10-05 22:18:07,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:07,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:07,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:07,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:07,287 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-05 22:18:07,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:07,408 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-05 22:18:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:18:07,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:07,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:07,410 INFO L225 Difference]: With dead ends: 174 [2020-10-05 22:18:07,410 INFO L226 Difference]: Without dead ends: 172 [2020-10-05 22:18:07,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:18:07,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-05 22:18:07,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-05 22:18:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:18:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-05 22:18:07,414 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-05 22:18:07,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:07,414 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-05 22:18:07,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-05 22:18:07,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:07,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:07,415 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:07,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-05 22:18:07,616 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:07,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:07,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-10-05 22:18:07,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:07,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255217794] [2020-10-05 22:18:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:07,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255217794] [2020-10-05 22:18:07,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455039259] [2020-10-05 22:18:07,701 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:07,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:18:07,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:07,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:07,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:07,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:07,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:07,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79006043] [2020-10-05 22:18:07,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:07,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:07,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:07,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:07,868 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-05 22:18:08,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:08,107 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-05 22:18:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:18:08,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:08,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:08,109 INFO L225 Difference]: With dead ends: 189 [2020-10-05 22:18:08,109 INFO L226 Difference]: Without dead ends: 187 [2020-10-05 22:18:08,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:18:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-05 22:18:08,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-05 22:18:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-05 22:18:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-05 22:18:08,113 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-05 22:18:08,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:08,113 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-05 22:18:08,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:08,113 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-05 22:18:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:08,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:08,114 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:08,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:08,314 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:08,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-10-05 22:18:08,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:08,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144586120] [2020-10-05 22:18:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:08,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144586120] [2020-10-05 22:18:08,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066297897] [2020-10-05 22:18:08,394 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:08,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:18:08,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:08,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:08,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:08,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:08,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:08,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845504804] [2020-10-05 22:18:08,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:08,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:08,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:08,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:08,559 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-05 22:18:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:08,699 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-05 22:18:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:18:08,700 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:08,701 INFO L225 Difference]: With dead ends: 175 [2020-10-05 22:18:08,701 INFO L226 Difference]: Without dead ends: 173 [2020-10-05 22:18:08,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:18:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-05 22:18:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-05 22:18:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-05 22:18:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-05 22:18:08,705 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-05 22:18:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:08,705 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-05 22:18:08,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-05 22:18:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:08,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:08,706 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:08,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:08,906 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:08,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-10-05 22:18:08,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:08,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531484944] [2020-10-05 22:18:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:08,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531484944] [2020-10-05 22:18:08,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189692381] [2020-10-05 22:18:08,981 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:09,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:18:09,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:09,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:09,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:09,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:18:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:09,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:09,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:09,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47592963] [2020-10-05 22:18:09,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:09,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:09,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:09,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:09,168 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-05 22:18:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:09,516 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-05 22:18:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:09,517 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:09,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:09,518 INFO L225 Difference]: With dead ends: 195 [2020-10-05 22:18:09,519 INFO L226 Difference]: Without dead ends: 190 [2020-10-05 22:18:09,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:18:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-05 22:18:09,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-05 22:18:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-05 22:18:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-05 22:18:09,522 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-05 22:18:09,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:09,522 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-05 22:18:09,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:09,522 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-05 22:18:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:09,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:09,523 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:09,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:09,727 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:09,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:09,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-10-05 22:18:09,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:09,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359449820] [2020-10-05 22:18:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:09,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359449820] [2020-10-05 22:18:09,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581425992] [2020-10-05 22:18:09,809 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:09,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:18:09,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:09,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:09,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:09,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:09,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:09,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469971554] [2020-10-05 22:18:09,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:09,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:09,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:09,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:09,989 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-05 22:18:10,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:10,254 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-05 22:18:10,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:18:10,255 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:10,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:10,257 INFO L225 Difference]: With dead ends: 187 [2020-10-05 22:18:10,257 INFO L226 Difference]: Without dead ends: 185 [2020-10-05 22:18:10,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:10,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-05 22:18:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-05 22:18:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-05 22:18:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-05 22:18:10,261 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-05 22:18:10,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:10,261 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-05 22:18:10,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:10,262 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-05 22:18:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:10,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:10,262 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:10,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:10,463 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:10,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:10,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-10-05 22:18:10,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:10,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853357148] [2020-10-05 22:18:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:10,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853357148] [2020-10-05 22:18:10,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357449789] [2020-10-05 22:18:10,536 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:10,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:10,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:10,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:18:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:10,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:10,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:10,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315271668] [2020-10-05 22:18:10,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:10,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:10,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:10,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:10,720 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-05 22:18:11,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:11,181 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-05 22:18:11,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:18:11,182 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:11,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:11,184 INFO L225 Difference]: With dead ends: 212 [2020-10-05 22:18:11,184 INFO L226 Difference]: Without dead ends: 207 [2020-10-05 22:18:11,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:18:11,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-05 22:18:11,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-05 22:18:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-05 22:18:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-05 22:18:11,188 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-05 22:18:11,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:11,188 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-05 22:18:11,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:11,188 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-05 22:18:11,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:11,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:11,189 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:11,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-05 22:18:11,394 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:11,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:11,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-10-05 22:18:11,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:11,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165778484] [2020-10-05 22:18:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:11,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165778484] [2020-10-05 22:18:11,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439869931] [2020-10-05 22:18:11,469 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:11,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:18:11,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:11,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:11,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:11,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:18:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:11,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:11,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:11,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718693270] [2020-10-05 22:18:11,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:11,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:11,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:11,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:11,645 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-05 22:18:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:11,982 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-05 22:18:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:11,983 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:11,984 INFO L225 Difference]: With dead ends: 202 [2020-10-05 22:18:11,984 INFO L226 Difference]: Without dead ends: 197 [2020-10-05 22:18:11,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:18:11,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-05 22:18:11,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-05 22:18:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-05 22:18:11,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-05 22:18:11,987 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-05 22:18:11,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:11,987 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-05 22:18:11,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:11,987 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-05 22:18:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:11,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:11,988 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:12,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:12,189 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:12,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:12,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-10-05 22:18:12,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:12,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573740231] [2020-10-05 22:18:12,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:12,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573740231] [2020-10-05 22:18:12,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573485981] [2020-10-05 22:18:12,259 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:12,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:18:12,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:12,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:12,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:12,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:12,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:12,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163380741] [2020-10-05 22:18:12,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:12,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:12,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:12,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:12,978 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-05 22:18:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:13,267 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-05 22:18:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:13,268 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:13,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:13,269 INFO L225 Difference]: With dead ends: 198 [2020-10-05 22:18:13,269 INFO L226 Difference]: Without dead ends: 196 [2020-10-05 22:18:13,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-05 22:18:13,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-05 22:18:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-05 22:18:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-05 22:18:13,273 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-05 22:18:13,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:13,273 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-05 22:18:13,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-05 22:18:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:13,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:13,274 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:13,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-05 22:18:13,482 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:13,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:13,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-10-05 22:18:13,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:13,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129125748] [2020-10-05 22:18:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:13,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129125748] [2020-10-05 22:18:13,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423665844] [2020-10-05 22:18:13,554 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:13,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:18:13,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:13,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:13,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:13,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:13,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:13,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669612507] [2020-10-05 22:18:13,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:13,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:13,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:13,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:13,782 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-05 22:18:14,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:14,186 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-05 22:18:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:18:14,186 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:14,188 INFO L225 Difference]: With dead ends: 209 [2020-10-05 22:18:14,188 INFO L226 Difference]: Without dead ends: 207 [2020-10-05 22:18:14,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:18:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-05 22:18:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-05 22:18:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-05 22:18:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-05 22:18:14,192 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-05 22:18:14,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:14,192 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-05 22:18:14,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:14,192 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-05 22:18:14,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:14,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:14,193 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:14,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-05 22:18:14,393 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:14,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-10-05 22:18:14,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:14,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812710841] [2020-10-05 22:18:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:14,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812710841] [2020-10-05 22:18:14,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367694263] [2020-10-05 22:18:14,466 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:14,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:18:14,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:14,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:14,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:14,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:18:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:14,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:14,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:14,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510516083] [2020-10-05 22:18:14,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:14,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:14,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:14,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:14,657 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-05 22:18:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:15,210 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-05 22:18:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:18:15,211 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:15,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:15,212 INFO L225 Difference]: With dead ends: 217 [2020-10-05 22:18:15,212 INFO L226 Difference]: Without dead ends: 212 [2020-10-05 22:18:15,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-05 22:18:15,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-05 22:18:15,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-05 22:18:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-05 22:18:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-05 22:18:15,216 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-05 22:18:15,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:15,217 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-05 22:18:15,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:15,217 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-05 22:18:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:15,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:15,218 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:15,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-05 22:18:15,424 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:15,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:15,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-10-05 22:18:15,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:15,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304012768] [2020-10-05 22:18:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:15,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304012768] [2020-10-05 22:18:15,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609134202] [2020-10-05 22:18:15,502 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:15,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:18:15,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:15,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:15,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:17,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:18:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:17,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:17,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:17,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16724009] [2020-10-05 22:18:17,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:17,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:17,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:17,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-05 22:18:17,775 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-05 22:18:22,072 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-05 22:18:26,284 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-05 22:18:26,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:26,726 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-05 22:18:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:18:26,726 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:26,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:26,727 INFO L225 Difference]: With dead ends: 236 [2020-10-05 22:18:26,727 INFO L226 Difference]: Without dead ends: 228 [2020-10-05 22:18:26,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-05 22:18:26,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-05 22:18:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-05 22:18:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-05 22:18:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-05 22:18:26,731 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-05 22:18:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:26,731 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-05 22:18:26,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-05 22:18:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:26,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:26,732 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:26,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-05 22:18:26,940 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:26,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:26,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-10-05 22:18:26,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:26,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247545601] [2020-10-05 22:18:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:27,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247545601] [2020-10-05 22:18:27,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455684434] [2020-10-05 22:18:27,016 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:27,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:27,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:27,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:18:27,187 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:18:30,343 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2020-10-05 22:18:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:30,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:30,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-05 22:18:30,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204619480] [2020-10-05 22:18:30,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:18:30,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:30,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:18:30,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2020-10-05 22:18:30,345 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 16 states. [2020-10-05 22:18:32,028 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-05 22:18:37,938 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-05 22:18:42,154 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-05 22:19:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:17,983 INFO L93 Difference]: Finished difference Result 236 states and 556 transitions. [2020-10-05 22:19:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:19:17,984 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-05 22:19:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:17,985 INFO L225 Difference]: With dead ends: 236 [2020-10-05 22:19:17,985 INFO L226 Difference]: Without dead ends: 231 [2020-10-05 22:19:17,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=311, Invalid=734, Unknown=11, NotChecked=0, Total=1056 [2020-10-05 22:19:17,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-05 22:19:17,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 140. [2020-10-05 22:19:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-05 22:19:17,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-05 22:19:17,989 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-05 22:19:17,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:17,989 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-05 22:19:17,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:19:17,989 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-05 22:19:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:19:17,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:17,990 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:18,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:18,200 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:18,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:18,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-10-05 22:19:18,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:18,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363893174] [2020-10-05 22:19:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:18,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363893174] [2020-10-05 22:19:18,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081500325] [2020-10-05 22:19:18,278 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:18,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:19:18,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:18,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:19:18,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:18,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:18,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:19:18,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205368386] [2020-10-05 22:19:18,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:19:18,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:18,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:19:18,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:19:18,466 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-05 22:19:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:18,739 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-05 22:19:18,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:19:18,739 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:19:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:18,740 INFO L225 Difference]: With dead ends: 197 [2020-10-05 22:19:18,740 INFO L226 Difference]: Without dead ends: 195 [2020-10-05 22:19:18,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:19:18,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-05 22:19:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-05 22:19:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-05 22:19:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-05 22:19:18,744 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-05 22:19:18,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:18,744 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-05 22:19:18,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:19:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-05 22:19:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:19:18,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:18,745 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:18,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:18,952 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:18,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-10-05 22:19:18,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:18,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929695419] [2020-10-05 22:19:18,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:19,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929695419] [2020-10-05 22:19:19,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819391014] [2020-10-05 22:19:19,033 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:19,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:19:19,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:19,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:19:19,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:19,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:19,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:19:19,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268788462] [2020-10-05 22:19:19,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:19:19,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:19,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:19:19,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:19:19,202 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-05 22:19:19,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:19,487 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-05 22:19:19,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:19:19,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:19:19,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:19,488 INFO L225 Difference]: With dead ends: 202 [2020-10-05 22:19:19,488 INFO L226 Difference]: Without dead ends: 200 [2020-10-05 22:19:19,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:19:19,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-05 22:19:19,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-05 22:19:19,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-05 22:19:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-05 22:19:19,491 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-05 22:19:19,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:19,492 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-05 22:19:19,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:19:19,492 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-05 22:19:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:19:19,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:19,492 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:19,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-05 22:19:19,693 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:19,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:19,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-10-05 22:19:19,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:19,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910984474] [2020-10-05 22:19:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:19,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910984474] [2020-10-05 22:19:19,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429305540] [2020-10-05 22:19:19,773 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:19,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:19:19,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:19,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:19:19,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:19,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:19,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:19:19,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588133927] [2020-10-05 22:19:19,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:19:19,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:19,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:19:19,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:19:19,966 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-05 22:19:20,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:20,276 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-05 22:19:20,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:19:20,277 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:19:20,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:20,278 INFO L225 Difference]: With dead ends: 197 [2020-10-05 22:19:20,278 INFO L226 Difference]: Without dead ends: 195 [2020-10-05 22:19:20,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:19:20,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-05 22:19:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-05 22:19:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:19:20,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-05 22:19:20,281 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-05 22:19:20,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:20,281 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-05 22:19:20,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:19:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-05 22:19:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:19:20,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:20,282 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:20,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-05 22:19:20,491 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:20,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-10-05 22:19:20,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:20,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353418250] [2020-10-05 22:19:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:20,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353418250] [2020-10-05 22:19:20,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404837546] [2020-10-05 22:19:20,569 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:20,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:19:20,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:20,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:19:20,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:20,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:20,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:19:20,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910258398] [2020-10-05 22:19:20,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:19:20,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:20,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:19:20,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:19:20,761 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-05 22:19:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:21,214 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-05 22:19:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:19:21,215 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:19:21,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:21,215 INFO L225 Difference]: With dead ends: 214 [2020-10-05 22:19:21,215 INFO L226 Difference]: Without dead ends: 212 [2020-10-05 22:19:21,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:19:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-05 22:19:21,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-05 22:19:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-05 22:19:21,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-05 22:19:21,228 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-05 22:19:21,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:21,228 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-05 22:19:21,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:19:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-05 22:19:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:19:21,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:21,229 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:21,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-05 22:19:21,430 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:21,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:21,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-10-05 22:19:21,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:21,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710823693] [2020-10-05 22:19:21,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:21,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710823693] [2020-10-05 22:19:21,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833290715] [2020-10-05 22:19:21,504 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:21,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:19:21,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:21,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:19:21,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:21,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:21,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:19:21,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298779482] [2020-10-05 22:19:21,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:19:21,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:21,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:19:21,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:19:21,667 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-05 22:19:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:22,081 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-05 22:19:22,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:19:22,081 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:19:22,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:22,083 INFO L225 Difference]: With dead ends: 217 [2020-10-05 22:19:22,083 INFO L226 Difference]: Without dead ends: 215 [2020-10-05 22:19:22,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:19:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-05 22:19:22,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-05 22:19:22,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-05 22:19:22,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-05 22:19:22,088 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-05 22:19:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:22,088 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-05 22:19:22,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:19:22,088 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-05 22:19:22,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:19:22,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:22,089 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:22,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:22,300 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:22,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-10-05 22:19:22,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:22,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320584966] [2020-10-05 22:19:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:22,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320584966] [2020-10-05 22:19:22,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052652949] [2020-10-05 22:19:22,385 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:22,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:19:22,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:22,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:22,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:19:22,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418745716] [2020-10-05 22:19:22,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:19:22,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:22,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:19:22,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:19:22,562 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-05 22:19:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:23,004 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-05 22:19:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:19:23,005 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:19:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:23,006 INFO L225 Difference]: With dead ends: 211 [2020-10-05 22:19:23,006 INFO L226 Difference]: Without dead ends: 209 [2020-10-05 22:19:23,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:19:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-05 22:19:23,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-05 22:19:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-05 22:19:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-05 22:19:23,011 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-05 22:19:23,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:23,011 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-05 22:19:23,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:19:23,012 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-05 22:19:23,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:19:23,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:23,012 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:23,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:23,213 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:23,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:23,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-10-05 22:19:23,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:23,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652321652] [2020-10-05 22:19:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:23,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652321652] [2020-10-05 22:19:23,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538552535] [2020-10-05 22:19:23,297 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:23,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:19:23,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:23,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:19:23,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:23,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:19:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:23,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:23,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:19:23,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817533697] [2020-10-05 22:19:23,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:19:23,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:23,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:19:23,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:19:23,474 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-05 22:19:24,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:24,001 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-05 22:19:24,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:19:24,002 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:19:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:24,003 INFO L225 Difference]: With dead ends: 211 [2020-10-05 22:19:24,003 INFO L226 Difference]: Without dead ends: 206 [2020-10-05 22:19:24,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-05 22:19:24,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-05 22:19:24,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-05 22:19:24,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-05 22:19:24,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-05 22:19:24,007 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-05 22:19:24,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:24,007 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-05 22:19:24,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:19:24,007 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-05 22:19:24,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:19:24,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:24,008 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:24,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-05 22:19:24,212 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:24,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:24,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-10-05 22:19:24,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:24,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854280036] [2020-10-05 22:19:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:24,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854280036] [2020-10-05 22:19:24,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575016236] [2020-10-05 22:19:24,296 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:24,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:19:24,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:24,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:19:24,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:24,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:19:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:24,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:24,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:19:24,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542860436] [2020-10-05 22:19:24,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:19:24,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:24,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:19:24,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:19:24,504 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-05 22:19:25,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:25,133 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-05 22:19:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:19:25,134 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:19:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:25,135 INFO L225 Difference]: With dead ends: 227 [2020-10-05 22:19:25,135 INFO L226 Difference]: Without dead ends: 222 [2020-10-05 22:19:25,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 22:19:25,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-05 22:19:25,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-05 22:19:25,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-05 22:19:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-05 22:19:25,138 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-05 22:19:25,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:25,139 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-05 22:19:25,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:19:25,139 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-05 22:19:25,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:19:25,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:25,139 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:25,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-05 22:19:25,340 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:25,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-10-05 22:19:25,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:25,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786413140] [2020-10-05 22:19:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:25,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786413140] [2020-10-05 22:19:25,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195010866] [2020-10-05 22:19:25,420 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:25,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:19:25,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:25,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:19:25,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:25,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:25,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:19:25,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258513224] [2020-10-05 22:19:25,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:19:25,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:25,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:19:25,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:19:25,587 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-05 22:19:26,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:26,080 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-05 22:19:26,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:19:26,081 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:19:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:26,082 INFO L225 Difference]: With dead ends: 221 [2020-10-05 22:19:26,082 INFO L226 Difference]: Without dead ends: 219 [2020-10-05 22:19:26,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:19:26,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-05 22:19:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-05 22:19:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-05 22:19:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-05 22:19:26,086 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-05 22:19:26,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:26,086 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-05 22:19:26,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:19:26,086 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-05 22:19:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:19:26,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:26,087 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:26,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:26,290 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:26,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:26,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-10-05 22:19:26,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:26,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879651107] [2020-10-05 22:19:26,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:26,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879651107] [2020-10-05 22:19:26,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114564740] [2020-10-05 22:19:26,371 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:26,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:19:26,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:26,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:19:26,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:26,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:19:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:26,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:26,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:19:26,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056255467] [2020-10-05 22:19:26,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:19:26,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:26,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:19:26,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:19:26,574 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-05 22:19:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:27,219 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-05 22:19:27,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:19:27,220 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:19:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:27,221 INFO L225 Difference]: With dead ends: 240 [2020-10-05 22:19:27,221 INFO L226 Difference]: Without dead ends: 232 [2020-10-05 22:19:27,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:19:27,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-05 22:19:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-05 22:19:27,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-05 22:19:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-05 22:19:27,225 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-05 22:19:27,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:27,225 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-05 22:19:27,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:19:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-05 22:19:27,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:19:27,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:27,226 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:27,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-05 22:19:27,426 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:27,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:27,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-10-05 22:19:27,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:27,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784184039] [2020-10-05 22:19:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:27,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784184039] [2020-10-05 22:19:27,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630619756] [2020-10-05 22:19:27,507 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:27,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:19:27,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:27,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:19:27,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:27,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:19:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:27,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:27,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:19:27,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009087611] [2020-10-05 22:19:27,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:19:27,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:27,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:19:27,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:19:27,663 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-05 22:19:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:28,294 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-05 22:19:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:19:28,295 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:19:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:28,296 INFO L225 Difference]: With dead ends: 238 [2020-10-05 22:19:28,296 INFO L226 Difference]: Without dead ends: 230 [2020-10-05 22:19:28,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:19:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-05 22:19:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-05 22:19:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:19:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-05 22:19:28,300 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-05 22:19:28,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:28,300 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-05 22:19:28,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:19:28,301 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-05 22:19:28,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:19:28,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:28,301 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:28,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:28,512 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:28,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:28,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-10-05 22:19:28,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:28,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918135125] [2020-10-05 22:19:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:28,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918135125] [2020-10-05 22:19:28,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023343570] [2020-10-05 22:19:28,587 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:28,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:19:28,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:28,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:28,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:19:28,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862811066] [2020-10-05 22:19:28,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:19:28,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:28,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:19:28,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:19:28,771 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-05 22:19:29,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:29,047 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-05 22:19:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:19:29,048 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:19:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:29,049 INFO L225 Difference]: With dead ends: 195 [2020-10-05 22:19:29,049 INFO L226 Difference]: Without dead ends: 193 [2020-10-05 22:19:29,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:19:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-05 22:19:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-05 22:19:29,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:19:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-05 22:19:29,051 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-05 22:19:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:29,051 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-05 22:19:29,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:19:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-05 22:19:29,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:19:29,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:29,052 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:29,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-05 22:19:29,253 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:29,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:29,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-10-05 22:19:29,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:29,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450351769] [2020-10-05 22:19:29,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:29,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450351769] [2020-10-05 22:19:29,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457076740] [2020-10-05 22:19:29,343 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:29,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:19:29,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:29,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:19:29,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:29,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:29,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:19:29,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679543343] [2020-10-05 22:19:29,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:19:29,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:29,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:19:29,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:19:29,556 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-05 22:19:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:30,060 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-05 22:19:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:19:30,061 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:19:30,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:30,062 INFO L225 Difference]: With dead ends: 206 [2020-10-05 22:19:30,062 INFO L226 Difference]: Without dead ends: 204 [2020-10-05 22:19:30,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:19:30,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-05 22:19:30,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-05 22:19:30,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-05 22:19:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-05 22:19:30,066 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-05 22:19:30,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:30,066 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-05 22:19:30,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:19:30,066 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-05 22:19:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:19:30,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:30,067 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:30,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:30,276 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:30,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-10-05 22:19:30,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:30,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14984325] [2020-10-05 22:19:30,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:30,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14984325] [2020-10-05 22:19:30,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065279759] [2020-10-05 22:19:30,360 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:30,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:19:30,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:30,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:19:30,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:30,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:19:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:31,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:31,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-05 22:19:31,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320534631] [2020-10-05 22:19:31,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:19:31,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:31,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:19:31,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-05 22:19:31,948 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-05 22:19:34,051 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-05 22:19:52,957 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-05 22:20:34,627 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-05 22:20:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:52,043 INFO L93 Difference]: Finished difference Result 260 states and 609 transitions. [2020-10-05 22:20:52,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 22:20:52,043 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-05 22:20:52,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:52,044 INFO L225 Difference]: With dead ends: 260 [2020-10-05 22:20:52,044 INFO L226 Difference]: Without dead ends: 255 [2020-10-05 22:20:52,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-05 22:20:52,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-05 22:20:52,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 139. [2020-10-05 22:20:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-05 22:20:52,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-05 22:20:52,049 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-05 22:20:52,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:52,049 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-05 22:20:52,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:20:52,049 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-05 22:20:52,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:20:52,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:52,050 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:52,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-05 22:20:52,260 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:52,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-10-05 22:20:52,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:52,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151952322] [2020-10-05 22:20:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:52,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151952322] [2020-10-05 22:20:52,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162925502] [2020-10-05 22:20:52,350 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:52,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:20:52,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:52,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:20:52,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:52,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:52,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:20:52,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611858742] [2020-10-05 22:20:52,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:20:52,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:52,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:20:52,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:20:52,555 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-05 22:20:52,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:52,780 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-05 22:20:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:20:52,781 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:20:52,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:52,781 INFO L225 Difference]: With dead ends: 194 [2020-10-05 22:20:52,781 INFO L226 Difference]: Without dead ends: 192 [2020-10-05 22:20:52,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:20:52,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-05 22:20:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-05 22:20:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-05 22:20:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-05 22:20:52,784 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-05 22:20:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:52,785 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-05 22:20:52,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:20:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-05 22:20:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:20:52,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:52,785 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:52,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:52,986 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:52,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:52,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-10-05 22:20:52,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:52,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44306692] [2020-10-05 22:20:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:53,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44306692] [2020-10-05 22:20:53,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841238538] [2020-10-05 22:20:53,078 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:53,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:20:53,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:53,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:20:53,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:53,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:53,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:20:53,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306227829] [2020-10-05 22:20:53,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:20:53,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:53,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:20:53,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:20:53,261 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-05 22:20:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:53,572 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-05 22:20:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:20:53,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:20:53,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:53,574 INFO L225 Difference]: With dead ends: 205 [2020-10-05 22:20:53,574 INFO L226 Difference]: Without dead ends: 203 [2020-10-05 22:20:53,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:20:53,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-05 22:20:53,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-05 22:20:53,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:20:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-05 22:20:53,578 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-05 22:20:53,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:53,578 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-05 22:20:53,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:20:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-05 22:20:53,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:20:53,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:53,579 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:53,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:53,788 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:53,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-10-05 22:20:53,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:53,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792986249] [2020-10-05 22:20:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:53,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792986249] [2020-10-05 22:20:53,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451724128] [2020-10-05 22:20:53,878 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:53,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:20:53,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:53,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:20:53,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:54,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:54,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:20:54,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455193602] [2020-10-05 22:20:54,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:20:54,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:54,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:20:54,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:20:54,048 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-05 22:20:54,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:54,328 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-05 22:20:54,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:20:54,329 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:20:54,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:54,329 INFO L225 Difference]: With dead ends: 201 [2020-10-05 22:20:54,329 INFO L226 Difference]: Without dead ends: 199 [2020-10-05 22:20:54,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:20:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-05 22:20:54,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-05 22:20:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-05 22:20:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-05 22:20:54,332 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-05 22:20:54,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:54,333 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-05 22:20:54,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:20:54,333 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-05 22:20:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:20:54,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:54,333 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:54,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:54,534 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:54,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:54,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-10-05 22:20:54,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:54,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732473798] [2020-10-05 22:20:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:54,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732473798] [2020-10-05 22:20:54,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099436359] [2020-10-05 22:20:54,616 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:54,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:20:54,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:54,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:54,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:20:54,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663495523] [2020-10-05 22:20:54,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:20:54,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:54,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:20:54,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:20:54,802 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-05 22:20:55,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:55,045 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-05 22:20:55,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:20:55,046 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:20:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:55,046 INFO L225 Difference]: With dead ends: 194 [2020-10-05 22:20:55,046 INFO L226 Difference]: Without dead ends: 192 [2020-10-05 22:20:55,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:20:55,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-05 22:20:55,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-05 22:20:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-05 22:20:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-05 22:20:55,049 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-05 22:20:55,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:55,049 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-05 22:20:55,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:20:55,050 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-05 22:20:55,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:20:55,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:55,050 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:55,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-05 22:20:55,251 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:55,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:55,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-10-05 22:20:55,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:55,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872313542] [2020-10-05 22:20:55,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:55,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872313542] [2020-10-05 22:20:55,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889879997] [2020-10-05 22:20:55,331 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:55,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:20:55,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:55,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:20:55,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:55,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:55,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:20:55,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260629875] [2020-10-05 22:20:55,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:20:55,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:55,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:20:55,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:20:55,530 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-05 22:20:55,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:55,879 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-05 22:20:55,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:20:55,880 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:20:55,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:55,880 INFO L225 Difference]: With dead ends: 209 [2020-10-05 22:20:55,880 INFO L226 Difference]: Without dead ends: 207 [2020-10-05 22:20:55,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:20:55,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-05 22:20:55,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-05 22:20:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-05 22:20:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-05 22:20:55,884 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-05 22:20:55,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:55,884 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-05 22:20:55,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:20:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-05 22:20:55,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:20:55,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:55,885 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:56,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:56,086 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:56,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:56,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-10-05 22:20:56,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:56,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936825198] [2020-10-05 22:20:56,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:56,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936825198] [2020-10-05 22:20:56,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205846164] [2020-10-05 22:20:56,171 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:56,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:20:56,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:56,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:20:56,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:56,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:56,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:20:56,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252508890] [2020-10-05 22:20:56,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:20:56,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:56,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:20:56,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:20:56,363 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-05 22:20:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:56,721 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-05 22:20:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:20:56,721 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:20:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:56,722 INFO L225 Difference]: With dead ends: 202 [2020-10-05 22:20:56,722 INFO L226 Difference]: Without dead ends: 200 [2020-10-05 22:20:56,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:20:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-05 22:20:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-05 22:20:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-05 22:20:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-05 22:20:56,724 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-05 22:20:56,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:56,725 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-05 22:20:56,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:20:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-05 22:20:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:20:56,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:56,725 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:56,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-05 22:20:56,926 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:56,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:56,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-10-05 22:20:56,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:56,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011013958] [2020-10-05 22:20:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:57,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:57,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011013958] [2020-10-05 22:20:57,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923458469] [2020-10-05 22:20:57,009 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:57,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:20:57,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:57,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:20:57,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:57,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:57,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:20:57,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559354871] [2020-10-05 22:20:57,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:20:57,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:57,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:20:57,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:20:57,192 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-05 22:20:57,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:57,522 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-05 22:20:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:20:57,522 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:20:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:57,523 INFO L225 Difference]: With dead ends: 201 [2020-10-05 22:20:57,523 INFO L226 Difference]: Without dead ends: 199 [2020-10-05 22:20:57,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:20:57,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-05 22:20:57,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-05 22:20:57,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-05 22:20:57,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-05 22:20:57,527 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-05 22:20:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:57,527 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-05 22:20:57,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:20:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-05 22:20:57,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:20:57,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:57,528 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:57,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-05 22:20:57,729 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:57,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:57,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-10-05 22:20:57,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:57,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515347406] [2020-10-05 22:20:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:57,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515347406] [2020-10-05 22:20:57,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234781473] [2020-10-05 22:20:57,812 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:57,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:20:57,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:57,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:20:57,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:57,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:57,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:20:57,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470455964] [2020-10-05 22:20:57,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:20:57,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:57,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:20:57,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:20:57,996 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-05 22:20:58,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:58,470 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-05 22:20:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:20:58,470 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:20:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:58,471 INFO L225 Difference]: With dead ends: 215 [2020-10-05 22:20:58,471 INFO L226 Difference]: Without dead ends: 213 [2020-10-05 22:20:58,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:20:58,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-05 22:20:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-05 22:20:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:20:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-05 22:20:58,475 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-05 22:20:58,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:58,475 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-05 22:20:58,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:20:58,476 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-05 22:20:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:20:58,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:58,476 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:58,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:58,682 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:58,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:58,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-10-05 22:20:58,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:58,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333263037] [2020-10-05 22:20:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:58,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333263037] [2020-10-05 22:20:58,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325447408] [2020-10-05 22:20:58,772 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:58,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:20:58,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:58,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:20:58,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:58,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:58,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:20:58,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39438749] [2020-10-05 22:20:58,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:20:58,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:58,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:20:58,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:20:58,961 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-05 22:20:59,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:59,362 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-05 22:20:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:20:59,363 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:20:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:59,364 INFO L225 Difference]: With dead ends: 196 [2020-10-05 22:20:59,364 INFO L226 Difference]: Without dead ends: 194 [2020-10-05 22:20:59,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:20:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-05 22:20:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-05 22:20:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-05 22:20:59,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-05 22:20:59,369 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-05 22:20:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:59,369 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-05 22:20:59,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:20:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-05 22:20:59,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:20:59,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:59,370 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:59,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:59,572 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:59,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:59,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-10-05 22:20:59,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:59,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76170461] [2020-10-05 22:20:59,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:59,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76170461] [2020-10-05 22:20:59,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179230199] [2020-10-05 22:20:59,663 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:59,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:20:59,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:59,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:20:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:59,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:59,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:20:59,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777812691] [2020-10-05 22:20:59,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:20:59,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:59,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:20:59,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:20:59,820 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-05 22:21:00,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:00,158 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-05 22:21:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:21:00,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:21:00,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:00,159 INFO L225 Difference]: With dead ends: 191 [2020-10-05 22:21:00,159 INFO L226 Difference]: Without dead ends: 186 [2020-10-05 22:21:00,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:21:00,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-05 22:21:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-05 22:21:00,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-05 22:21:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-05 22:21:00,164 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-05 22:21:00,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:00,164 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-05 22:21:00,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:21:00,164 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-05 22:21:00,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:00,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:00,165 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:00,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-05 22:21:00,368 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:00,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:00,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-10-05 22:21:00,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:00,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713791653] [2020-10-05 22:21:00,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:00,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713791653] [2020-10-05 22:21:00,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133114677] [2020-10-05 22:21:00,452 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:00,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:00,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:00,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:21:00,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:00,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:00,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:00,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:21:00,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800928792] [2020-10-05 22:21:00,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:21:00,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:00,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:21:00,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:21:00,662 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-05 22:21:01,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:01,261 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-05 22:21:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:21:01,262 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:21:01,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:01,263 INFO L225 Difference]: With dead ends: 232 [2020-10-05 22:21:01,263 INFO L226 Difference]: Without dead ends: 227 [2020-10-05 22:21:01,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:21:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-05 22:21:01,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-05 22:21:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:21:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-05 22:21:01,266 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-05 22:21:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:01,267 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-05 22:21:01,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:21:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-05 22:21:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:01,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:01,267 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:01,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:01,478 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:01,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-10-05 22:21:01,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:01,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457458567] [2020-10-05 22:21:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:01,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457458567] [2020-10-05 22:21:01,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956413219] [2020-10-05 22:21:01,566 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:01,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:21:01,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:01,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:21:01,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:01,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:01,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:21:01,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375339834] [2020-10-05 22:21:01,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:21:01,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:01,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:21:01,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:21:01,774 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-05 22:21:02,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:02,379 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-05 22:21:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:21:02,379 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:21:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:02,380 INFO L225 Difference]: With dead ends: 222 [2020-10-05 22:21:02,380 INFO L226 Difference]: Without dead ends: 220 [2020-10-05 22:21:02,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:21:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-05 22:21:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-05 22:21:02,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-05 22:21:02,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-05 22:21:02,383 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-05 22:21:02,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:02,384 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-05 22:21:02,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:21:02,384 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-05 22:21:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:02,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:02,384 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:02,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:02,585 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:02,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-10-05 22:21:02,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:02,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926340399] [2020-10-05 22:21:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:02,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926340399] [2020-10-05 22:21:02,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662035834] [2020-10-05 22:21:02,675 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:02,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:02,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:02,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:21:02,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:02,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:21:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:02,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:02,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:21:02,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231528449] [2020-10-05 22:21:02,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:21:02,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:02,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:21:02,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:21:02,879 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-05 22:21:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:03,720 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-05 22:21:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:21:03,720 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:21:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:03,721 INFO L225 Difference]: With dead ends: 254 [2020-10-05 22:21:03,721 INFO L226 Difference]: Without dead ends: 246 [2020-10-05 22:21:03,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:21:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-05 22:21:03,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-05 22:21:03,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-05 22:21:03,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-05 22:21:03,726 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-05 22:21:03,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:03,726 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-05 22:21:03,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:21:03,726 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-05 22:21:03,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:03,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:03,727 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:03,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:03,933 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:03,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-10-05 22:21:03,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:03,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515432977] [2020-10-05 22:21:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:04,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515432977] [2020-10-05 22:21:04,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278902632] [2020-10-05 22:21:04,020 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:04,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:21:04,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:04,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:21:04,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:04,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:04,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:04,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:21:04,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128962951] [2020-10-05 22:21:04,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:21:04,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:04,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:21:04,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:21:04,223 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-05 22:21:05,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:05,017 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-05 22:21:05,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:21:05,017 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:21:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:05,018 INFO L225 Difference]: With dead ends: 246 [2020-10-05 22:21:05,018 INFO L226 Difference]: Without dead ends: 238 [2020-10-05 22:21:05,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 22:21:05,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-05 22:21:05,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-05 22:21:05,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-05 22:21:05,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-05 22:21:05,031 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-05 22:21:05,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:05,032 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-05 22:21:05,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:21:05,032 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-05 22:21:05,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:05,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:05,032 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:05,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-05 22:21:05,241 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:05,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:05,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-10-05 22:21:05,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:05,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899785277] [2020-10-05 22:21:05,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:05,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899785277] [2020-10-05 22:21:05,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261159956] [2020-10-05 22:21:05,320 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:05,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:21:05,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:05,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:21:05,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:05,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:05,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:21:05,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63782753] [2020-10-05 22:21:05,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:21:05,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:05,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:21:05,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:21:05,505 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-05 22:21:05,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:05,935 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-05 22:21:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:21:05,936 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:21:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:05,936 INFO L225 Difference]: With dead ends: 208 [2020-10-05 22:21:05,936 INFO L226 Difference]: Without dead ends: 206 [2020-10-05 22:21:05,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:21:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-05 22:21:05,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-05 22:21:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-05 22:21:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-05 22:21:05,939 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-05 22:21:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:05,940 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-05 22:21:05,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:21:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-05 22:21:05,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:05,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:05,941 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:06,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-05 22:21:06,142 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:06,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-10-05 22:21:06,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:06,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496992396] [2020-10-05 22:21:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:06,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496992396] [2020-10-05 22:21:06,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213000587] [2020-10-05 22:21:06,227 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:06,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:21:06,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:06,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:06,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:21:06,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246195848] [2020-10-05 22:21:06,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:21:06,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:06,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:21:06,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:21:06,392 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-05 22:21:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:06,955 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-05 22:21:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:21:06,956 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:21:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:06,957 INFO L225 Difference]: With dead ends: 215 [2020-10-05 22:21:06,957 INFO L226 Difference]: Without dead ends: 213 [2020-10-05 22:21:06,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-05 22:21:06,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-05 22:21:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-05 22:21:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-05 22:21:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-05 22:21:06,961 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-05 22:21:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:06,961 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-05 22:21:06,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:21:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-05 22:21:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:06,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:06,962 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:07,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-05 22:21:07,163 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:07,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-10-05 22:21:07,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:07,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191922783] [2020-10-05 22:21:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:07,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191922783] [2020-10-05 22:21:07,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963881864] [2020-10-05 22:21:07,248 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:07,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:07,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:07,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:21:07,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:07,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:21:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:07,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:07,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:21:07,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502547756] [2020-10-05 22:21:07,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:21:07,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:07,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:21:07,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:21:07,410 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-05 22:21:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:08,019 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-05 22:21:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:21:08,020 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:21:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:08,020 INFO L225 Difference]: With dead ends: 236 [2020-10-05 22:21:08,020 INFO L226 Difference]: Without dead ends: 228 [2020-10-05 22:21:08,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:21:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-05 22:21:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-05 22:21:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-05 22:21:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-05 22:21:08,024 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-05 22:21:08,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:08,024 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-05 22:21:08,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:21:08,024 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-05 22:21:08,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:08,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:08,025 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:08,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-05 22:21:08,225 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:08,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:08,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-10-05 22:21:08,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:08,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946813601] [2020-10-05 22:21:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:08,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946813601] [2020-10-05 22:21:08,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972869191] [2020-10-05 22:21:08,315 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:08,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:21:08,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:08,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:21:08,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:08,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:08,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:08,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:21:08,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257532143] [2020-10-05 22:21:08,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:21:08,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:08,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:21:08,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:21:08,484 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-05 22:21:09,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:09,164 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-05 22:21:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:21:09,169 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:21:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:09,170 INFO L225 Difference]: With dead ends: 241 [2020-10-05 22:21:09,170 INFO L226 Difference]: Without dead ends: 233 [2020-10-05 22:21:09,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:21:09,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-05 22:21:09,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-05 22:21:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-05 22:21:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-05 22:21:09,172 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-05 22:21:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:09,173 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-05 22:21:09,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:21:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-05 22:21:09,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:09,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:09,173 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:09,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-05 22:21:09,374 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:09,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:09,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-10-05 22:21:09,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:09,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342310689] [2020-10-05 22:21:09,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:09,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342310689] [2020-10-05 22:21:09,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682306395] [2020-10-05 22:21:09,464 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:09,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:09,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:09,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:21:09,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:09,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:21:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:09,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:09,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:21:09,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768155231] [2020-10-05 22:21:09,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:21:09,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:09,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:21:09,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:21:09,638 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-05 22:21:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:10,271 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-05 22:21:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:21:10,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:21:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:10,272 INFO L225 Difference]: With dead ends: 232 [2020-10-05 22:21:10,272 INFO L226 Difference]: Without dead ends: 224 [2020-10-05 22:21:10,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 22:21:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-05 22:21:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-05 22:21:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-05 22:21:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-05 22:21:10,277 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-05 22:21:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:10,277 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-05 22:21:10,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:21:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-05 22:21:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:10,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:10,278 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:10,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:10,487 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:10,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:10,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-10-05 22:21:10,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:10,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130642424] [2020-10-05 22:21:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:10,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130642424] [2020-10-05 22:21:10,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92050503] [2020-10-05 22:21:10,596 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:10,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 22:21:10,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:10,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:10,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:10,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:21:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:10,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:10,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-05 22:21:10,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522634231] [2020-10-05 22:21:10,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 22:21:10,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:10,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 22:21:10,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:21:10,856 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-05 22:21:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:11,143 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-05 22:21:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:21:11,144 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-05 22:21:11,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:11,146 INFO L225 Difference]: With dead ends: 185 [2020-10-05 22:21:11,146 INFO L226 Difference]: Without dead ends: 180 [2020-10-05 22:21:11,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:21:11,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-05 22:21:11,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-05 22:21:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-05 22:21:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-05 22:21:11,151 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-05 22:21:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:11,151 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-05 22:21:11,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 22:21:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-05 22:21:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:11,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:11,152 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:11,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-05 22:21:11,365 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:11,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:11,366 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-10-05 22:21:11,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:11,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034520282] [2020-10-05 22:21:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:11,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034520282] [2020-10-05 22:21:11,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876826658] [2020-10-05 22:21:11,543 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 [2020-10-05 22:21:11,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 22:21:11,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:11,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:11,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:11,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:11,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:11,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613368718] [2020-10-05 22:21:11,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:11,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:11,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:11,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:11,789 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-05 22:21:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:11,858 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-05 22:21:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:21:11,859 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-05 22:21:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:11,859 INFO L225 Difference]: With dead ends: 180 [2020-10-05 22:21:11,859 INFO L226 Difference]: Without dead ends: 177 [2020-10-05 22:21:11,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:11,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-05 22:21:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-05 22:21:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-05 22:21:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-05 22:21:11,863 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-05 22:21:11,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:11,863 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-05 22:21:11,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-05 22:21:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:11,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:11,864 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:12,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-05 22:21:12,065 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:12,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:12,065 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-10-05 22:21:12,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:12,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154173910] [2020-10-05 22:21:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:12,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154173910] [2020-10-05 22:21:12,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224379352] [2020-10-05 22:21:12,222 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 [2020-10-05 22:21:12,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:12,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:12,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:12,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:12,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:12,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:12,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623597213] [2020-10-05 22:21:12,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:12,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:12,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:12,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:12,456 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-05 22:21:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:12,543 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-05 22:21:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:21:12,544 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-05 22:21:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:12,544 INFO L225 Difference]: With dead ends: 197 [2020-10-05 22:21:12,544 INFO L226 Difference]: Without dead ends: 194 [2020-10-05 22:21:12,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:21:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-05 22:21:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-05 22:21:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-05 22:21:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-05 22:21:12,547 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-05 22:21:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:12,547 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-05 22:21:12,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-05 22:21:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:12,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:12,548 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:12,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:12,756 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:12,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-10-05 22:21:12,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:12,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267613797] [2020-10-05 22:21:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:12,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267613797] [2020-10-05 22:21:12,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007106985] [2020-10-05 22:21:12,906 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 [2020-10-05 22:21:12,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 22:21:12,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:12,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:12,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:13,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:13,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:13,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678500725] [2020-10-05 22:21:13,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:13,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:13,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:13,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:13,257 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-05 22:21:13,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:13,426 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-05 22:21:13,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:21:13,428 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-05 22:21:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:13,429 INFO L225 Difference]: With dead ends: 196 [2020-10-05 22:21:13,429 INFO L226 Difference]: Without dead ends: 193 [2020-10-05 22:21:13,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:21:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-05 22:21:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-05 22:21:13,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-05 22:21:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-05 22:21:13,435 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-05 22:21:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:13,435 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-05 22:21:13,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:13,436 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-05 22:21:13,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:13,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:13,436 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:13,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:13,647 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:13,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-10-05 22:21:13,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:13,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673781546] [2020-10-05 22:21:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:13,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673781546] [2020-10-05 22:21:13,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033872530] [2020-10-05 22:21:13,794 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 [2020-10-05 22:21:13,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 22:21:13,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:13,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:13,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:14,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:14,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:14,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959611699] [2020-10-05 22:21:14,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:14,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:14,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:14,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:14,026 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-05 22:21:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:14,171 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-05 22:21:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:21:14,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-05 22:21:14,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:14,172 INFO L225 Difference]: With dead ends: 195 [2020-10-05 22:21:14,173 INFO L226 Difference]: Without dead ends: 192 [2020-10-05 22:21:14,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:21:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-05 22:21:14,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-05 22:21:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-05 22:21:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-05 22:21:14,176 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-05 22:21:14,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:14,176 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-05 22:21:14,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:14,176 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-05 22:21:14,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:14,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:14,177 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:14,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:14,377 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:14,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:14,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-10-05 22:21:14,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:14,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612050470] [2020-10-05 22:21:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:14,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612050470] [2020-10-05 22:21:14,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313322722] [2020-10-05 22:21:14,505 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 [2020-10-05 22:21:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:14,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:14,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:14,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:14,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:14,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702007269] [2020-10-05 22:21:14,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:14,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:14,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:14,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:14,747 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-05 22:21:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:14,930 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-05 22:21:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:21:14,930 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-05 22:21:14,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:14,931 INFO L225 Difference]: With dead ends: 194 [2020-10-05 22:21:14,931 INFO L226 Difference]: Without dead ends: 191 [2020-10-05 22:21:14,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:21:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-05 22:21:14,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-05 22:21:14,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-05 22:21:14,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-05 22:21:14,935 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-05 22:21:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:14,935 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-05 22:21:14,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:14,936 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-05 22:21:14,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:14,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:14,936 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:15,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:15,145 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:15,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:15,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-10-05 22:21:15,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:15,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633251708] [2020-10-05 22:21:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:15,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633251708] [2020-10-05 22:21:15,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285780001] [2020-10-05 22:21:15,271 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 [2020-10-05 22:21:15,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:15,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:15,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:15,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:15,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:15,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:15,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590080836] [2020-10-05 22:21:15,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:15,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:15,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:15,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:15,501 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-05 22:21:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:15,720 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-05 22:21:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:21:15,720 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-05 22:21:15,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:15,721 INFO L225 Difference]: With dead ends: 193 [2020-10-05 22:21:15,721 INFO L226 Difference]: Without dead ends: 190 [2020-10-05 22:21:15,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:21:15,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-05 22:21:15,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-05 22:21:15,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-05 22:21:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-05 22:21:15,725 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-05 22:21:15,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:15,725 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-05 22:21:15,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:15,726 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-05 22:21:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:15,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:15,726 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:15,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-05 22:21:15,935 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:15,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:15,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-10-05 22:21:15,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:15,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740263571] [2020-10-05 22:21:15,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:16,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740263571] [2020-10-05 22:21:16,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571264956] [2020-10-05 22:21:16,039 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 [2020-10-05 22:21:16,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 22:21:16,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:16,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:16,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:16,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:16,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:16,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230746896] [2020-10-05 22:21:16,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:16,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:16,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:16,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:16,283 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-05 22:21:16,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:16,616 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-05 22:21:16,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:21:16,617 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-05 22:21:16,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:16,619 INFO L225 Difference]: With dead ends: 202 [2020-10-05 22:21:16,619 INFO L226 Difference]: Without dead ends: 196 [2020-10-05 22:21:16,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:21:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-05 22:21:16,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-05 22:21:16,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-05 22:21:16,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-05 22:21:16,624 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-05 22:21:16,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:16,625 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-05 22:21:16,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:16,625 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-05 22:21:16,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:16,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:16,626 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:16,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-05 22:21:16,837 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:16,838 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-10-05 22:21:16,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:16,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861319385] [2020-10-05 22:21:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:16,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861319385] [2020-10-05 22:21:16,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547460545] [2020-10-05 22:21:16,991 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:17,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:21:17,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:17,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:17,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:17,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:17,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:17,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964072663] [2020-10-05 22:21:17,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:17,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:17,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:17,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:17,250 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-05 22:21:17,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:17,331 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-05 22:21:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:21:17,332 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:17,332 INFO L225 Difference]: With dead ends: 188 [2020-10-05 22:21:17,333 INFO L226 Difference]: Without dead ends: 186 [2020-10-05 22:21:17,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:17,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-05 22:21:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-05 22:21:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-05 22:21:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-05 22:21:17,336 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-05 22:21:17,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:17,336 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-05 22:21:17,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-05 22:21:17,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:17,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:17,337 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:17,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-05 22:21:17,537 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:17,538 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-10-05 22:21:17,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:17,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095119204] [2020-10-05 22:21:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:17,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095119204] [2020-10-05 22:21:17,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747710242] [2020-10-05 22:21:17,665 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:17,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:21:17,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:17,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:17,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:17,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:17,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:17,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501429417] [2020-10-05 22:21:17,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:17,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:17,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:17,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:17,921 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-05 22:21:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:18,169 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-05 22:21:18,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:21:18,170 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:18,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:18,171 INFO L225 Difference]: With dead ends: 199 [2020-10-05 22:21:18,171 INFO L226 Difference]: Without dead ends: 197 [2020-10-05 22:21:18,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:21:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-05 22:21:18,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-05 22:21:18,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-05 22:21:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-05 22:21:18,174 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-05 22:21:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:18,175 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-05 22:21:18,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-05 22:21:18,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:18,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:18,175 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:18,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-05 22:21:18,376 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:18,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:18,376 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-10-05 22:21:18,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:18,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95623650] [2020-10-05 22:21:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:18,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95623650] [2020-10-05 22:21:18,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073550494] [2020-10-05 22:21:18,499 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:18,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:18,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:19,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:19,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:19,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173279260] [2020-10-05 22:21:19,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:19,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:19,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:19,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:19,595 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-05 22:21:19,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:19,902 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-05 22:21:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:21:19,903 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:19,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:19,903 INFO L225 Difference]: With dead ends: 210 [2020-10-05 22:21:19,904 INFO L226 Difference]: Without dead ends: 208 [2020-10-05 22:21:19,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:21:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-05 22:21:19,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-05 22:21:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-05 22:21:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-05 22:21:19,907 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-05 22:21:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:19,907 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-05 22:21:19,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:19,907 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-05 22:21:19,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:19,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:19,907 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:20,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-05 22:21:20,108 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:20,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:20,109 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-10-05 22:21:20,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:20,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788660109] [2020-10-05 22:21:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:20,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788660109] [2020-10-05 22:21:20,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128661850] [2020-10-05 22:21:20,229 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:20,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:20,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:20,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:20,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:20,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:20,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:20,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014844714] [2020-10-05 22:21:20,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:20,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:20,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:20,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:20,544 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-05 22:21:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:20,878 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-05 22:21:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:21:20,879 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:20,880 INFO L225 Difference]: With dead ends: 210 [2020-10-05 22:21:20,880 INFO L226 Difference]: Without dead ends: 208 [2020-10-05 22:21:20,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:21:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-05 22:21:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-05 22:21:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-05 22:21:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-05 22:21:20,884 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-05 22:21:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:20,884 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-05 22:21:20,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-05 22:21:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:20,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:20,884 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:21,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-05 22:21:21,088 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:21,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:21,088 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-10-05 22:21:21,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:21,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176315528] [2020-10-05 22:21:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:21,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176315528] [2020-10-05 22:21:21,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858265571] [2020-10-05 22:21:21,210 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:21,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:21:21,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:21,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:21,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:24,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:24,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:24,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112586427] [2020-10-05 22:21:24,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:24,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:24,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:24,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-05 22:21:24,752 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-05 22:21:28,957 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-05 22:21:29,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:29,249 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-05 22:21:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:21:29,250 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:29,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:29,251 INFO L225 Difference]: With dead ends: 218 [2020-10-05 22:21:29,252 INFO L226 Difference]: Without dead ends: 216 [2020-10-05 22:21:29,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-05 22:21:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-05 22:21:29,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-05 22:21:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-05 22:21:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-05 22:21:29,255 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-05 22:21:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:29,256 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-05 22:21:29,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-05 22:21:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:29,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:29,257 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:29,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:29,467 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:29,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:29,468 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-10-05 22:21:29,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:29,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286563408] [2020-10-05 22:21:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:29,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286563408] [2020-10-05 22:21:29,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433227020] [2020-10-05 22:21:29,594 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:29,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:29,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:29,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:29,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:29,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:29,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:29,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496715091] [2020-10-05 22:21:29,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:29,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:29,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:29,957 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-05 22:21:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:30,349 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-05 22:21:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:21:30,350 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:30,350 INFO L225 Difference]: With dead ends: 212 [2020-10-05 22:21:30,350 INFO L226 Difference]: Without dead ends: 210 [2020-10-05 22:21:30,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:21:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-05 22:21:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-05 22:21:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-05 22:21:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-05 22:21:30,354 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-05 22:21:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:30,354 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-05 22:21:30,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:30,354 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-05 22:21:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:30,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:30,355 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:30,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:30,556 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:30,556 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-10-05 22:21:30,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:30,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120182337] [2020-10-05 22:21:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:30,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120182337] [2020-10-05 22:21:30,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49977235] [2020-10-05 22:21:30,675 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:30,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:21:30,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:30,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:30,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:30,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:30,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:30,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978865068] [2020-10-05 22:21:30,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:30,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:30,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:30,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:30,909 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-05 22:21:31,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:31,288 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-05 22:21:31,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:21:31,289 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:31,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:31,290 INFO L225 Difference]: With dead ends: 212 [2020-10-05 22:21:31,290 INFO L226 Difference]: Without dead ends: 210 [2020-10-05 22:21:31,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:21:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-05 22:21:31,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-05 22:21:31,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-05 22:21:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-05 22:21:31,293 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-05 22:21:31,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:31,294 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-05 22:21:31,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:31,294 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-05 22:21:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:31,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:31,294 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:31,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:31,495 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:31,496 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-10-05 22:21:31,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:31,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5354323] [2020-10-05 22:21:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:31,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5354323] [2020-10-05 22:21:31,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532028650] [2020-10-05 22:21:31,617 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:31,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:21:31,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:31,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:31,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:31,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:31,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:31,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473434554] [2020-10-05 22:21:31,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:31,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:31,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:31,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:31,847 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-05 22:21:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:32,254 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-05 22:21:32,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:21:32,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:32,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:32,255 INFO L225 Difference]: With dead ends: 224 [2020-10-05 22:21:32,256 INFO L226 Difference]: Without dead ends: 222 [2020-10-05 22:21:32,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:21:32,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-05 22:21:32,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-05 22:21:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-05 22:21:32,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-05 22:21:32,258 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-05 22:21:32,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:32,258 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-05 22:21:32,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:32,259 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-05 22:21:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:32,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:32,259 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:32,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:32,460 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:32,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:32,461 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-10-05 22:21:32,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:32,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641564911] [2020-10-05 22:21:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:32,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641564911] [2020-10-05 22:21:32,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389151850] [2020-10-05 22:21:32,581 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:32,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:32,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:32,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:32,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:32,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424305236] [2020-10-05 22:21:32,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:32,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:32,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:32,800 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-05 22:21:33,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:33,139 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-05 22:21:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:21:33,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:33,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:33,141 INFO L225 Difference]: With dead ends: 218 [2020-10-05 22:21:33,141 INFO L226 Difference]: Without dead ends: 216 [2020-10-05 22:21:33,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:21:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-05 22:21:33,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-05 22:21:33,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-05 22:21:33,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-05 22:21:33,144 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-05 22:21:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:33,145 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-05 22:21:33,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:33,145 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-05 22:21:33,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:33,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:33,145 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:33,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:33,346 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:33,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:33,347 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-10-05 22:21:33,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:33,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459280594] [2020-10-05 22:21:33,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:33,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459280594] [2020-10-05 22:21:33,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104530770] [2020-10-05 22:21:33,462 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:33,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:33,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:33,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:33,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:33,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:33,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:33,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154616250] [2020-10-05 22:21:33,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:33,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:33,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:33,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:33,686 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-05 22:21:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:33,975 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-05 22:21:33,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:21:33,976 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:33,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:33,976 INFO L225 Difference]: With dead ends: 206 [2020-10-05 22:21:33,977 INFO L226 Difference]: Without dead ends: 204 [2020-10-05 22:21:33,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:21:33,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-05 22:21:33,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-05 22:21:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-05 22:21:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-05 22:21:33,979 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-05 22:21:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:33,979 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-05 22:21:33,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-05 22:21:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:33,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:33,980 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:34,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-05 22:21:34,181 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:34,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:34,181 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-10-05 22:21:34,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:34,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783757703] [2020-10-05 22:21:34,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:34,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783757703] [2020-10-05 22:21:34,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604870776] [2020-10-05 22:21:34,311 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:34,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 22:21:34,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:34,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:34,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:34,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:34,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:34,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119350397] [2020-10-05 22:21:34,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:34,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:34,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:34,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:34,531 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-05 22:21:34,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:34,848 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-05 22:21:34,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:21:34,849 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:34,849 INFO L225 Difference]: With dead ends: 207 [2020-10-05 22:21:34,849 INFO L226 Difference]: Without dead ends: 205 [2020-10-05 22:21:34,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:21:34,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-05 22:21:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-05 22:21:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-05 22:21:34,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-05 22:21:34,853 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-05 22:21:34,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:34,854 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-05 22:21:34,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:34,854 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-05 22:21:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:34,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:34,854 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:35,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-05 22:21:35,059 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:35,059 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-10-05 22:21:35,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:35,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863479438] [2020-10-05 22:21:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:35,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863479438] [2020-10-05 22:21:35,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16241014] [2020-10-05 22:21:35,182 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:35,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:35,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:35,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:35,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:35,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:35,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:35,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626753614] [2020-10-05 22:21:35,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:35,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:35,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:35,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:35,414 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-05 22:21:35,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:35,751 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-05 22:21:35,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:21:35,752 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:35,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:35,753 INFO L225 Difference]: With dead ends: 217 [2020-10-05 22:21:35,753 INFO L226 Difference]: Without dead ends: 215 [2020-10-05 22:21:35,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:21:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-05 22:21:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-05 22:21:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-05 22:21:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-05 22:21:35,757 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-05 22:21:35,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:35,757 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-05 22:21:35,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:35,757 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-05 22:21:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:35,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:35,758 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:35,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-05 22:21:35,959 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:35,959 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-10-05 22:21:35,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:35,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110862377] [2020-10-05 22:21:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:36,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110862377] [2020-10-05 22:21:36,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254393542] [2020-10-05 22:21:36,103 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:36,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:21:36,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:36,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:37,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:37,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:37,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239036133] [2020-10-05 22:21:37,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:37,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:37,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:37,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:37,547 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-05 22:21:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:37,986 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-05 22:21:37,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:21:37,987 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:37,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:37,988 INFO L225 Difference]: With dead ends: 223 [2020-10-05 22:21:37,988 INFO L226 Difference]: Without dead ends: 221 [2020-10-05 22:21:37,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:21:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-05 22:21:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-05 22:21:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-05 22:21:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-05 22:21:37,992 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-05 22:21:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:37,992 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-05 22:21:37,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-05 22:21:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:37,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:37,993 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:38,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-05 22:21:38,203 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:38,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:38,203 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-10-05 22:21:38,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:38,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047193920] [2020-10-05 22:21:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:38,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047193920] [2020-10-05 22:21:38,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876805504] [2020-10-05 22:21:38,336 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:38,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:21:38,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:38,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:38,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:38,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:38,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:38,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953686325] [2020-10-05 22:21:38,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:38,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:38,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:38,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:38,557 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-05 22:21:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:38,891 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-05 22:21:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:21:38,891 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:38,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:38,892 INFO L225 Difference]: With dead ends: 225 [2020-10-05 22:21:38,892 INFO L226 Difference]: Without dead ends: 223 [2020-10-05 22:21:38,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:21:38,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-05 22:21:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-05 22:21:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-05 22:21:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-05 22:21:38,896 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-05 22:21:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:38,896 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-05 22:21:38,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-05 22:21:38,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:38,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:38,897 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:39,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:39,098 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:39,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:39,098 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-10-05 22:21:39,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:39,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059855509] [2020-10-05 22:21:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:39,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059855509] [2020-10-05 22:21:39,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215484163] [2020-10-05 22:21:39,249 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:39,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:39,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:39,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:39,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:39,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949482016] [2020-10-05 22:21:39,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:39,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:39,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:39,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:39,485 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-05 22:21:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:39,811 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-05 22:21:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:21:39,812 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:39,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:39,812 INFO L225 Difference]: With dead ends: 214 [2020-10-05 22:21:39,812 INFO L226 Difference]: Without dead ends: 212 [2020-10-05 22:21:39,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:21:39,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-05 22:21:39,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-05 22:21:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-05 22:21:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-05 22:21:39,816 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-05 22:21:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:39,816 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-05 22:21:39,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-05 22:21:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:39,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:39,817 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:40,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:40,018 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:40,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:40,018 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-10-05 22:21:40,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:40,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726144679] [2020-10-05 22:21:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:40,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726144679] [2020-10-05 22:21:40,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123653274] [2020-10-05 22:21:40,185 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:40,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:40,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:40,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:40,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:40,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:40,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:40,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390699404] [2020-10-05 22:21:40,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:40,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:40,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:40,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:40,423 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-05 22:21:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:40,661 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-05 22:21:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:21:40,662 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:40,662 INFO L225 Difference]: With dead ends: 203 [2020-10-05 22:21:40,662 INFO L226 Difference]: Without dead ends: 201 [2020-10-05 22:21:40,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:21:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-05 22:21:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-05 22:21:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-05 22:21:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-05 22:21:40,666 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-05 22:21:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:40,666 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-05 22:21:40,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:40,666 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-05 22:21:40,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:40,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:40,667 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:40,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-05 22:21:40,868 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:40,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:40,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-10-05 22:21:40,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:40,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120277159] [2020-10-05 22:21:40,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:41,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120277159] [2020-10-05 22:21:41,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346861858] [2020-10-05 22:21:41,060 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:41,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:21:41,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:41,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:41,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:41,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:41,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:41,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67898268] [2020-10-05 22:21:41,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:41,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:41,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:41,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:41,279 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-05 22:21:41,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:41,360 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-05 22:21:41,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:21:41,362 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:41,362 INFO L225 Difference]: With dead ends: 212 [2020-10-05 22:21:41,363 INFO L226 Difference]: Without dead ends: 210 [2020-10-05 22:21:41,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:21:41,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-05 22:21:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-05 22:21:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-05 22:21:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-05 22:21:41,366 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-05 22:21:41,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:41,366 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-05 22:21:41,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:41,366 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-05 22:21:41,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:41,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:41,367 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:41,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:41,567 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-10-05 22:21:41,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:41,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641664689] [2020-10-05 22:21:41,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:41,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641664689] [2020-10-05 22:21:41,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220168218] [2020-10-05 22:21:41,737 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:41,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:41,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:41,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:41,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:41,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:41,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:41,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082123261] [2020-10-05 22:21:41,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:41,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:41,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:41,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:41,978 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-05 22:21:42,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:42,250 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-05 22:21:42,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:21:42,251 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:42,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:42,252 INFO L225 Difference]: With dead ends: 217 [2020-10-05 22:21:42,252 INFO L226 Difference]: Without dead ends: 215 [2020-10-05 22:21:42,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:21:42,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-05 22:21:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-05 22:21:42,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-05 22:21:42,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-05 22:21:42,256 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-05 22:21:42,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:42,256 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-05 22:21:42,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:42,256 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-05 22:21:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:42,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:42,256 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:42,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:42,457 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:42,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-10-05 22:21:42,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:42,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505639663] [2020-10-05 22:21:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:42,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505639663] [2020-10-05 22:21:42,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210860711] [2020-10-05 22:21:42,627 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:42,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:21:42,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:42,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:42,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:44,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:44,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:44,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066796222] [2020-10-05 22:21:44,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:44,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:44,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:44,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:44,009 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-05 22:21:44,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:44,370 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-05 22:21:44,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:21:44,371 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:44,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:44,371 INFO L225 Difference]: With dead ends: 227 [2020-10-05 22:21:44,371 INFO L226 Difference]: Without dead ends: 225 [2020-10-05 22:21:44,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:21:44,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-05 22:21:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-05 22:21:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-05 22:21:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-05 22:21:44,374 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-05 22:21:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:44,374 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-05 22:21:44,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-05 22:21:44,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:44,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:44,375 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:44,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:44,575 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:44,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-10-05 22:21:44,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:44,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809641021] [2020-10-05 22:21:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:44,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809641021] [2020-10-05 22:21:44,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097197410] [2020-10-05 22:21:44,722 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:44,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:21:44,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:44,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:44,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:45,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:45,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:45,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902880175] [2020-10-05 22:21:45,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:45,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:45,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:45,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:45,010 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-05 22:21:45,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:45,492 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-05 22:21:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:21:45,492 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:45,493 INFO L225 Difference]: With dead ends: 227 [2020-10-05 22:21:45,493 INFO L226 Difference]: Without dead ends: 225 [2020-10-05 22:21:45,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:21:45,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-05 22:21:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-05 22:21:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-05 22:21:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-05 22:21:45,497 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-05 22:21:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:45,497 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-05 22:21:45,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-05 22:21:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:45,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:45,498 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:45,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-05 22:21:45,700 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:45,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-10-05 22:21:45,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:45,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908850096] [2020-10-05 22:21:45,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:45,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908850096] [2020-10-05 22:21:45,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564375375] [2020-10-05 22:21:45,840 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:45,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:45,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:49,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:49,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:49,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077814233] [2020-10-05 22:21:49,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:49,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:49,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:49,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-05 22:21:49,970 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. Received shutdown request... [2020-10-05 22:21:52,181 WARN L210 SmtUtils]: Removed 1 from assertion stack [2020-10-05 22:21:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:21:52,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-05 22:21:52,382 WARN L544 AbstractCegarLoop]: Verification canceled [2020-10-05 22:21:52,388 WARN L228 ceAbstractionStarter]: Timeout [2020-10-05 22:21:52,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 10:21:52 BasicIcfg [2020-10-05 22:21:52,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-05 22:21:52,390 INFO L168 Benchmark]: Toolchain (without parser) took 281919.09 ms. Allocated memory was 147.3 MB in the beginning and 220.2 MB in the end (delta: 72.9 MB). Free memory was 103.4 MB in the beginning and 188.3 MB in the end (delta: -84.9 MB). Peak memory consumption was 95.9 MB. Max. memory is 7.1 GB. [2020-10-05 22:21:52,390 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 147.3 MB. Free memory was 123.3 MB in the beginning and 123.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-05 22:21:52,390 INFO L168 Benchmark]: CACSL2BoogieTranslator took 630.17 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 103.2 MB in the beginning and 161.8 MB in the end (delta: -58.6 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-10-05 22:21:52,391 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.26 ms. Allocated memory is still 204.5 MB. Free memory was 161.8 MB in the beginning and 159.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-05 22:21:52,391 INFO L168 Benchmark]: Boogie Preprocessor took 29.01 ms. Allocated memory is still 204.5 MB. Free memory was 159.9 MB in the beginning and 158.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-05 22:21:52,391 INFO L168 Benchmark]: RCFGBuilder took 445.68 ms. Allocated memory is still 204.5 MB. Free memory was 158.0 MB in the beginning and 137.7 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-10-05 22:21:52,392 INFO L168 Benchmark]: TraceAbstraction took 280759.71 ms. Allocated memory was 204.5 MB in the beginning and 220.2 MB in the end (delta: 15.7 MB). Free memory was 137.0 MB in the beginning and 188.3 MB in the end (delta: -51.2 MB). Peak memory consumption was 72.4 MB. Max. memory is 7.1 GB. [2020-10-05 22:21:52,393 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 147.3 MB. Free memory was 123.3 MB in the beginning and 123.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 630.17 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 103.2 MB in the beginning and 161.8 MB in the end (delta: -58.6 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 49.26 ms. Allocated memory is still 204.5 MB. Free memory was 161.8 MB in the beginning and 159.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.01 ms. Allocated memory is still 204.5 MB. Free memory was 159.9 MB in the beginning and 158.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 445.68 ms. Allocated memory is still 204.5 MB. Free memory was 158.0 MB in the beginning and 137.7 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 280759.71 ms. Allocated memory was 204.5 MB in the beginning and 220.2 MB in the end (delta: 15.7 MB). Free memory was 137.0 MB in the beginning and 188.3 MB in the end (delta: -51.2 MB). Peak memory consumption was 72.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 15 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 576 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 988 CheckedPairsTotal, 47 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (164states) and FLOYD_HOARE automaton (currently 7 states, 17 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 41 for 2049ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 280.6s, OverallIterations: 167, TraceHistogramMax: 6, AutomataDifference: 183.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 2169 SDtfs, 14681 SDslu, 14547 SDs, 0 SdLazy, 10268 SolverSat, 3458 SolverUnsat, 42 SolverUnknown, 0 SolverNotchecked, 85.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4066 GetRequests, 782 SyntacticMatches, 140 SemanticMatches, 3143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15694 ImplicationChecksByTransitivity, 138.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 166 MinimizatonAttempts, 7387 StatesRemovedByMinimization, 166 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 53.0s InterpolantComputationTime, 4026 NumberOfCodeBlocks, 4026 NumberOfCodeBlocksAsserted, 504 NumberOfCheckSat, 3700 ConstructedInterpolants, 7 QuantifiedInterpolants, 378332 SizeOfPredicates, 159 NumberOfNonLiveVariables, 13676 ConjunctsInSsa, 1533 ConjunctsInUnsatCore, 326 InterpolantComputations, 8 PerfectInterpolantSequences, 0/1512 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 could not prove your program: Timeout Completed graceful shutdown