./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/triangular-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 03b83410ec0d4003fbe602c21989d2443a34b0c7 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 02:44:59,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 02:44:59,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 02:45:00,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 02:45:00,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 02:45:00,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 02:45:00,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 02:45:00,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 02:45:00,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 02:45:00,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 02:45:00,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 02:45:00,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 02:45:00,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 02:45:00,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 02:45:00,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 02:45:00,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 02:45:00,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 02:45:00,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 02:45:00,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 02:45:00,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 02:45:00,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 02:45:00,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 02:45:00,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 02:45:00,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 02:45:00,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 02:45:00,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 02:45:00,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 02:45:00,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 02:45:00,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 02:45:00,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 02:45:00,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 02:45:00,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 02:45:00,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 02:45:00,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 02:45:00,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 02:45:00,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 02:45:00,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 02:45:00,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 02:45:00,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 02:45:00,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 02:45:00,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 02:45:00,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 02:45:00,140 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 02:45:00,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 02:45:00,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 02:45:00,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 02:45:00,143 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 02:45:00,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 02:45:00,144 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 02:45:00,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 02:45:00,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 02:45:00,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 02:45:00,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 02:45:00,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 02:45:00,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 02:45:00,147 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 02:45:00,147 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 02:45:00,147 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 02:45:00,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 02:45:00,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 02:45:00,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 02:45:00,148 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 02:45:00,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 02:45:00,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 02:45:00,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 02:45:00,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 02:45:00,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 02:45:00,150 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 02:45:00,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 02:45:00,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 02:45:00,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 02:45:00,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03b83410ec0d4003fbe602c21989d2443a34b0c7 [2020-10-20 02:45:00,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 02:45:00,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 02:45:00,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 02:45:00,376 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 02:45:00,377 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 02:45:00,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-1.i [2020-10-20 02:45:00,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1af2323a/7a2487b4f8f542fbadb75e5a1323a7ac/FLAGf97b5a0a8 [2020-10-20 02:45:00,996 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 02:45:00,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-1.i [2020-10-20 02:45:01,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1af2323a/7a2487b4f8f542fbadb75e5a1323a7ac/FLAGf97b5a0a8 [2020-10-20 02:45:01,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1af2323a/7a2487b4f8f542fbadb75e5a1323a7ac [2020-10-20 02:45:01,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 02:45:01,304 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 02:45:01,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 02:45:01,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 02:45:01,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 02:45:01,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 02:45:01" (1/1) ... [2020-10-20 02:45:01,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb59c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:01, skipping insertion in model container [2020-10-20 02:45:01,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 02:45:01" (1/1) ... [2020-10-20 02:45:01,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 02:45:01,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 02:45:01,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 02:45:01,807 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 02:45:01,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 02:45:02,005 INFO L208 MainTranslator]: Completed translation [2020-10-20 02:45:02,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:02 WrapperNode [2020-10-20 02:45:02,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 02:45:02,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 02:45:02,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 02:45:02,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 02:45:02,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:02" (1/1) ... [2020-10-20 02:45:02,056 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:02" (1/1) ... [2020-10-20 02:45:02,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 02:45:02,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 02:45:02,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 02:45:02,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 02:45:02,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:02" (1/1) ... [2020-10-20 02:45:02,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:02" (1/1) ... [2020-10-20 02:45:02,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:02" (1/1) ... [2020-10-20 02:45:02,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:02" (1/1) ... [2020-10-20 02:45:02,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:02" (1/1) ... [2020-10-20 02:45:02,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:02" (1/1) ... [2020-10-20 02:45:02,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:02" (1/1) ... [2020-10-20 02:45:02,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 02:45:02,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 02:45:02,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 02:45:02,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 02:45:02,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:02" (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 [2020-10-20 02:45:02,232 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-20 02:45:02,232 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-20 02:45:02,232 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-20 02:45:02,233 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-20 02:45:02,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 02:45:02,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-20 02:45:02,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 02:45:02,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 02:45:02,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 02:45:02,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-20 02:45:02,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 02:45:02,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 02:45:02,236 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-20 02:45:02,561 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 02:45:02,561 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-20 02:45:02,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 02:45:02 BoogieIcfgContainer [2020-10-20 02:45:02,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 02:45:02,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 02:45:02,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 02:45:02,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 02:45:02,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 02:45:01" (1/3) ... [2020-10-20 02:45:02,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17823b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 02:45:02, skipping insertion in model container [2020-10-20 02:45:02,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:02" (2/3) ... [2020-10-20 02:45:02,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17823b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 02:45:02, skipping insertion in model container [2020-10-20 02:45:02,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 02:45:02" (3/3) ... [2020-10-20 02:45:02,572 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-10-20 02:45:02,584 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-20 02:45:02,584 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 02:45:02,594 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 02:45:02,595 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-20 02:45:02,625 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,625 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,625 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,625 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,626 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,626 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,627 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,627 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,627 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,628 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,628 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,628 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,628 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,629 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,629 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,629 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,629 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,629 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,630 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,630 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,642 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,642 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,642 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,643 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,643 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,643 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,643 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,644 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,647 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,648 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,648 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,648 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,648 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,649 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,668 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,668 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,668 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,669 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,669 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,669 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:02,678 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-20 02:45:02,692 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-20 02:45:02,711 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 02:45:02,711 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 02:45:02,711 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 02:45:02,711 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 02:45:02,711 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 02:45:02,711 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 02:45:02,712 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 02:45:02,712 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 02:45:02,724 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-20 02:45:02,726 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-20 02:45:02,729 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-20 02:45:02,731 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-10-20 02:45:02,772 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-10-20 02:45:02,773 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-20 02:45:02,779 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-10-20 02:45:02,782 INFO L117 LiptonReduction]: Number of co-enabled transitions 1144 [2020-10-20 02:45:03,764 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-20 02:45:04,252 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-20 02:45:04,726 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-20 02:45:04,870 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-20 02:45:04,921 INFO L132 LiptonReduction]: Checked pairs total: 1187 [2020-10-20 02:45:04,921 INFO L134 LiptonReduction]: Total number of compositions: 62 [2020-10-20 02:45:04,929 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-20 02:45:04,940 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-20 02:45:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-20 02:45:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 02:45:04,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:04,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 02:45:04,952 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:04,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:04,959 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-10-20 02:45:04,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:04,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597614631] [2020-10-20 02:45:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:05,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597614631] [2020-10-20 02:45:05,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:05,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 02:45:05,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985872669] [2020-10-20 02:45:05,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 02:45:05,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:05,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 02:45:05,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 02:45:05,223 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-20 02:45:05,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:05,319 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-20 02:45:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 02:45:05,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-20 02:45:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:05,349 INFO L225 Difference]: With dead ends: 75 [2020-10-20 02:45:05,349 INFO L226 Difference]: Without dead ends: 42 [2020-10-20 02:45:05,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 02:45:05,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-20 02:45:05,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-20 02:45:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 02:45:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-20 02:45:05,392 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-20 02:45:05,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:05,392 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-20 02:45:05,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 02:45:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-20 02:45:05,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 02:45:05,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:05,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:05,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 02:45:05,394 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:05,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-10-20 02:45:05,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:05,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376686835] [2020-10-20 02:45:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:05,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376686835] [2020-10-20 02:45:05,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:05,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 02:45:05,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957795530] [2020-10-20 02:45:05,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 02:45:05,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:05,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 02:45:05,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 02:45:05,480 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-20 02:45:05,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:05,508 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-20 02:45:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 02:45:05,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-20 02:45:05,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:05,511 INFO L225 Difference]: With dead ends: 56 [2020-10-20 02:45:05,511 INFO L226 Difference]: Without dead ends: 50 [2020-10-20 02:45:05,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-20 02:45:05,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-20 02:45:05,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-20 02:45:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 02:45:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-20 02:45:05,520 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-20 02:45:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:05,522 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-20 02:45:05,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 02:45:05,522 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-20 02:45:05,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 02:45:05,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:05,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:05,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 02:45:05,523 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:05,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:05,524 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-10-20 02:45:05,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:05,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575992891] [2020-10-20 02:45:05,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:05,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575992891] [2020-10-20 02:45:05,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:05,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 02:45:05,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462146564] [2020-10-20 02:45:05,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 02:45:05,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:05,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 02:45:05,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 02:45:05,673 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-20 02:45:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:05,772 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-10-20 02:45:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 02:45:05,772 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-20 02:45:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:05,774 INFO L225 Difference]: With dead ends: 54 [2020-10-20 02:45:05,774 INFO L226 Difference]: Without dead ends: 47 [2020-10-20 02:45:05,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:05,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-20 02:45:05,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-20 02:45:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 02:45:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-10-20 02:45:05,782 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-10-20 02:45:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:05,783 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-10-20 02:45:05,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 02:45:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-10-20 02:45:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 02:45:05,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:05,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:05,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 02:45:05,784 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:05,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:05,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-10-20 02:45:05,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:05,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76426828] [2020-10-20 02:45:05,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:05,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76426828] [2020-10-20 02:45:05,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:05,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 02:45:05,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482005322] [2020-10-20 02:45:05,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 02:45:05,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:05,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 02:45:05,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 02:45:05,860 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-10-20 02:45:05,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:05,938 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-10-20 02:45:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 02:45:05,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-20 02:45:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:05,945 INFO L225 Difference]: With dead ends: 59 [2020-10-20 02:45:05,945 INFO L226 Difference]: Without dead ends: 53 [2020-10-20 02:45:05,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:05,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-20 02:45:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-10-20 02:45:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 02:45:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-10-20 02:45:05,953 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-10-20 02:45:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:05,954 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-10-20 02:45:05,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 02:45:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-10-20 02:45:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 02:45:05,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:05,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:05,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 02:45:05,955 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:05,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:05,956 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-10-20 02:45:05,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:05,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693982828] [2020-10-20 02:45:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:06,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693982828] [2020-10-20 02:45:06,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:06,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 02:45:06,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074113696] [2020-10-20 02:45:06,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 02:45:06,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:06,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 02:45:06,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 02:45:06,012 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-10-20 02:45:06,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:06,110 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-10-20 02:45:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 02:45:06,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-20 02:45:06,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:06,113 INFO L225 Difference]: With dead ends: 65 [2020-10-20 02:45:06,113 INFO L226 Difference]: Without dead ends: 52 [2020-10-20 02:45:06,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:06,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-20 02:45:06,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-10-20 02:45:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 02:45:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-10-20 02:45:06,119 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-10-20 02:45:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:06,119 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-10-20 02:45:06,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 02:45:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-10-20 02:45:06,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 02:45:06,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:06,120 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:06,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 02:45:06,121 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:06,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:06,121 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-10-20 02:45:06,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:06,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448451286] [2020-10-20 02:45:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:06,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448451286] [2020-10-20 02:45:06,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897137931] [2020-10-20 02:45:06,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:06,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:06,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:06,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 02:45:06,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:06,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:06,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:06,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 02:45:06,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036801001] [2020-10-20 02:45:06,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 02:45:06,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:06,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 02:45:06,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-20 02:45:06,349 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-10-20 02:45:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:06,540 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-10-20 02:45:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 02:45:06,541 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-20 02:45:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:06,544 INFO L225 Difference]: With dead ends: 63 [2020-10-20 02:45:06,544 INFO L226 Difference]: Without dead ends: 54 [2020-10-20 02:45:06,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-20 02:45:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-20 02:45:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-20 02:45:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-20 02:45:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-10-20 02:45:06,549 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-10-20 02:45:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:06,550 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-10-20 02:45:06,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 02:45:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-10-20 02:45:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 02:45:06,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:06,551 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:06,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-20 02:45:06,754 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:06,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:06,755 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-10-20 02:45:06,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:06,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134219686] [2020-10-20 02:45:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:06,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134219686] [2020-10-20 02:45:06,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494378807] [2020-10-20 02:45:06,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:06,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:06,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 02:45:06,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:06,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:06,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:06,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 02:45:06,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428289393] [2020-10-20 02:45:06,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 02:45:06,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:06,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 02:45:06,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-20 02:45:06,961 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-10-20 02:45:07,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:07,075 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-20 02:45:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 02:45:07,076 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-20 02:45:07,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:07,077 INFO L225 Difference]: With dead ends: 56 [2020-10-20 02:45:07,077 INFO L226 Difference]: Without dead ends: 51 [2020-10-20 02:45:07,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-20 02:45:07,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-20 02:45:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-20 02:45:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-20 02:45:07,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-20 02:45:07,083 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-20 02:45:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:07,084 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-20 02:45:07,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 02:45:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-20 02:45:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 02:45:07,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:07,086 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:07,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:07,297 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:07,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-10-20 02:45:07,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:07,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28436671] [2020-10-20 02:45:07,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:07,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28436671] [2020-10-20 02:45:07,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541963711] [2020-10-20 02:45:07,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:07,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-20 02:45:07,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:07,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 02:45:07,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:07,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:07,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:07,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-20 02:45:07,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818210844] [2020-10-20 02:45:07,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 02:45:07,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:07,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 02:45:07,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-20 02:45:07,451 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-20 02:45:07,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:07,566 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-20 02:45:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 02:45:07,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-20 02:45:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:07,567 INFO L225 Difference]: With dead ends: 56 [2020-10-20 02:45:07,568 INFO L226 Difference]: Without dead ends: 50 [2020-10-20 02:45:07,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-10-20 02:45:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-20 02:45:07,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-20 02:45:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-20 02:45:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-20 02:45:07,573 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-10-20 02:45:07,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:07,573 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-20 02:45:07,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 02:45:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-20 02:45:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 02:45:07,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:07,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:07,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:07,793 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:07,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:07,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-10-20 02:45:07,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:07,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376848818] [2020-10-20 02:45:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:07,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376848818] [2020-10-20 02:45:07,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015454722] [2020-10-20 02:45:07,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:07,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 02:45:07,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:07,931 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:07,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:07,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 02:45:07,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139972551] [2020-10-20 02:45:07,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 02:45:07,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:07,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 02:45:07,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:07,945 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-10-20 02:45:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:08,149 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-10-20 02:45:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 02:45:08,150 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-20 02:45:08,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:08,151 INFO L225 Difference]: With dead ends: 63 [2020-10-20 02:45:08,151 INFO L226 Difference]: Without dead ends: 58 [2020-10-20 02:45:08,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-20 02:45:08,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-20 02:45:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-10-20 02:45:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 02:45:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-20 02:45:08,157 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-10-20 02:45:08,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:08,157 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-20 02:45:08,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 02:45:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-20 02:45:08,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 02:45:08,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:08,159 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:08,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:08,360 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:08,361 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-10-20 02:45:08,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:08,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091046250] [2020-10-20 02:45:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:08,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091046250] [2020-10-20 02:45:08,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552004959] [2020-10-20 02:45:08,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:08,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:08,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:08,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 02:45:08,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:08,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:08,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:08,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 02:45:08,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103046999] [2020-10-20 02:45:08,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 02:45:08,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:08,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 02:45:08,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:08,525 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-10-20 02:45:08,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:08,745 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-10-20 02:45:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 02:45:08,746 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-20 02:45:08,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:08,747 INFO L225 Difference]: With dead ends: 71 [2020-10-20 02:45:08,747 INFO L226 Difference]: Without dead ends: 62 [2020-10-20 02:45:08,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-20 02:45:08,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-20 02:45:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-10-20 02:45:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-20 02:45:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-20 02:45:08,753 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-10-20 02:45:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:08,754 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-20 02:45:08,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 02:45:08,754 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-20 02:45:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 02:45:08,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:08,756 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:08,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-20 02:45:08,957 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:08,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:08,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-10-20 02:45:08,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:08,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113186748] [2020-10-20 02:45:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:09,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113186748] [2020-10-20 02:45:09,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285715885] [2020-10-20 02:45:09,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:09,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-20 02:45:09,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:09,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 02:45:09,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:09,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:09,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 02:45:09,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489773222] [2020-10-20 02:45:09,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 02:45:09,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 02:45:09,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-20 02:45:09,110 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-20 02:45:09,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:09,401 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-20 02:45:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 02:45:09,402 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-20 02:45:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:09,403 INFO L225 Difference]: With dead ends: 72 [2020-10-20 02:45:09,403 INFO L226 Difference]: Without dead ends: 63 [2020-10-20 02:45:09,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-20 02:45:09,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-20 02:45:09,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-10-20 02:45:09,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 02:45:09,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-20 02:45:09,408 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-10-20 02:45:09,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:09,408 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-20 02:45:09,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 02:45:09,408 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-20 02:45:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 02:45:09,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:09,409 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:09,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:09,620 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:09,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-10-20 02:45:09,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:09,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359065120] [2020-10-20 02:45:09,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:09,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359065120] [2020-10-20 02:45:09,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777234357] [2020-10-20 02:45:09,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:09,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:09,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:09,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 02:45:09,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:09,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:09,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:09,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 02:45:09,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838186760] [2020-10-20 02:45:09,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 02:45:09,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:09,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 02:45:09,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-20 02:45:09,796 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-10-20 02:45:09,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:09,987 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-20 02:45:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 02:45:09,988 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-20 02:45:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:09,989 INFO L225 Difference]: With dead ends: 64 [2020-10-20 02:45:09,989 INFO L226 Difference]: Without dead ends: 59 [2020-10-20 02:45:09,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-20 02:45:09,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-20 02:45:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-20 02:45:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-20 02:45:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-20 02:45:09,994 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-20 02:45:09,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:09,994 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-20 02:45:09,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 02:45:09,995 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-20 02:45:09,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 02:45:09,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:09,996 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:10,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:10,208 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:10,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:10,208 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-10-20 02:45:10,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:10,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650165114] [2020-10-20 02:45:10,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:10,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650165114] [2020-10-20 02:45:10,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251692702] [2020-10-20 02:45:10,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:10,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-20 02:45:10,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:10,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 02:45:10,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:10,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:10,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:10,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-20 02:45:10,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047454897] [2020-10-20 02:45:10,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 02:45:10,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:10,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 02:45:10,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-20 02:45:10,400 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-20 02:45:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:10,534 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-20 02:45:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 02:45:10,535 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-20 02:45:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:10,536 INFO L225 Difference]: With dead ends: 64 [2020-10-20 02:45:10,536 INFO L226 Difference]: Without dead ends: 58 [2020-10-20 02:45:10,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-20 02:45:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-20 02:45:10,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-20 02:45:10,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-20 02:45:10,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-20 02:45:10,547 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-10-20 02:45:10,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:10,548 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-20 02:45:10,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 02:45:10,548 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-20 02:45:10,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 02:45:10,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:10,553 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:10,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-20 02:45:10,754 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:10,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:10,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-10-20 02:45:10,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:10,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944700539] [2020-10-20 02:45:10,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:10,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944700539] [2020-10-20 02:45:10,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747143192] [2020-10-20 02:45:10,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:10,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-20 02:45:10,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:10,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 02:45:10,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:10,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:10,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:10,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 02:45:10,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247511583] [2020-10-20 02:45:10,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 02:45:10,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:10,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 02:45:10,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-20 02:45:10,981 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-10-20 02:45:11,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:11,259 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-20 02:45:11,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 02:45:11,259 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-20 02:45:11,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:11,260 INFO L225 Difference]: With dead ends: 73 [2020-10-20 02:45:11,260 INFO L226 Difference]: Without dead ends: 68 [2020-10-20 02:45:11,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-20 02:45:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-20 02:45:11,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-10-20 02:45:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 02:45:11,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-20 02:45:11,265 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-10-20 02:45:11,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:11,265 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-20 02:45:11,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 02:45:11,266 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-20 02:45:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 02:45:11,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:11,266 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:11,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:11,477 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:11,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-10-20 02:45:11,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:11,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146150000] [2020-10-20 02:45:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:11,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146150000] [2020-10-20 02:45:11,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194334152] [2020-10-20 02:45:11,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:11,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 02:45:11,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:11,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:11,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:11,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 02:45:11,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264479362] [2020-10-20 02:45:11,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 02:45:11,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:11,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 02:45:11,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-20 02:45:11,649 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-10-20 02:45:11,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:11,972 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-10-20 02:45:11,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 02:45:11,975 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-20 02:45:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:11,976 INFO L225 Difference]: With dead ends: 81 [2020-10-20 02:45:11,976 INFO L226 Difference]: Without dead ends: 72 [2020-10-20 02:45:11,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-20 02:45:11,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-20 02:45:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-20 02:45:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-20 02:45:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-20 02:45:11,989 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-10-20 02:45:11,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:11,990 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-20 02:45:11,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 02:45:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-20 02:45:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 02:45:11,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:11,990 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:12,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-20 02:45:12,192 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:12,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-10-20 02:45:12,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:12,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200402916] [2020-10-20 02:45:12,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:12,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200402916] [2020-10-20 02:45:12,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744260246] [2020-10-20 02:45:12,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-20 02:45:12,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:12,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:12,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 02:45:12,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:12,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:12,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:12,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 02:45:12,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934678299] [2020-10-20 02:45:12,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 02:45:12,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:12,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 02:45:12,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-20 02:45:12,354 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-20 02:45:12,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:12,713 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-20 02:45:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-20 02:45:12,714 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-20 02:45:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:12,715 INFO L225 Difference]: With dead ends: 82 [2020-10-20 02:45:12,715 INFO L226 Difference]: Without dead ends: 73 [2020-10-20 02:45:12,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-20 02:45:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-20 02:45:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-20 02:45:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 02:45:12,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-20 02:45:12,718 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-10-20 02:45:12,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:12,719 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-20 02:45:12,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 02:45:12,719 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-20 02:45:12,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 02:45:12,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:12,719 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:12,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-20 02:45:12,920 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:12,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:12,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-10-20 02:45:12,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:12,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32491739] [2020-10-20 02:45:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:13,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32491739] [2020-10-20 02:45:13,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489192157] [2020-10-20 02:45:13,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:13,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-20 02:45:13,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:13,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 02:45:13,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:13,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:13,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:13,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 02:45:13,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954614949] [2020-10-20 02:45:13,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 02:45:13,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:13,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 02:45:13,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-20 02:45:13,108 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-10-20 02:45:13,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:13,398 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-10-20 02:45:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 02:45:13,398 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-20 02:45:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:13,399 INFO L225 Difference]: With dead ends: 72 [2020-10-20 02:45:13,399 INFO L226 Difference]: Without dead ends: 67 [2020-10-20 02:45:13,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-20 02:45:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-20 02:45:13,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-20 02:45:13,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-20 02:45:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-20 02:45:13,407 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-20 02:45:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:13,408 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-20 02:45:13,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 02:45:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-20 02:45:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 02:45:13,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:13,409 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:13,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-20 02:45:13,613 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:13,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:13,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-10-20 02:45:13,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:13,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779610857] [2020-10-20 02:45:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:13,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779610857] [2020-10-20 02:45:13,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729519420] [2020-10-20 02:45:13,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:13,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:13,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:13,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 02:45:13,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:13,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:13,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:13,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-20 02:45:13,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845751957] [2020-10-20 02:45:13,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 02:45:13,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:13,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 02:45:13,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-20 02:45:13,805 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-20 02:45:13,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:13,984 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-10-20 02:45:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 02:45:13,985 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-20 02:45:13,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:13,986 INFO L225 Difference]: With dead ends: 72 [2020-10-20 02:45:13,986 INFO L226 Difference]: Without dead ends: 66 [2020-10-20 02:45:13,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-20 02:45:13,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-20 02:45:13,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-10-20 02:45:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-20 02:45:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-20 02:45:13,990 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-10-20 02:45:13,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:13,991 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-20 02:45:13,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 02:45:13,991 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-20 02:45:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 02:45:13,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:13,992 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:14,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-20 02:45:14,196 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:14,196 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-10-20 02:45:14,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:14,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159218754] [2020-10-20 02:45:14,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:14,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159218754] [2020-10-20 02:45:14,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540782670] [2020-10-20 02:45:14,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:14,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-20 02:45:14,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:14,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 02:45:14,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:14,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:14,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:14,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-20 02:45:14,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509567484] [2020-10-20 02:45:14,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 02:45:14,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:14,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 02:45:14,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-20 02:45:14,405 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-10-20 02:45:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:14,764 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-20 02:45:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-20 02:45:14,764 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-20 02:45:14,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:14,765 INFO L225 Difference]: With dead ends: 83 [2020-10-20 02:45:14,766 INFO L226 Difference]: Without dead ends: 78 [2020-10-20 02:45:14,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-20 02:45:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-20 02:45:14,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-10-20 02:45:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-20 02:45:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-20 02:45:14,770 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-10-20 02:45:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:14,770 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-20 02:45:14,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 02:45:14,771 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-20 02:45:14,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 02:45:14,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:14,771 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:14,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:14,978 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:14,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:14,978 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-10-20 02:45:14,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:14,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930695866] [2020-10-20 02:45:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:15,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930695866] [2020-10-20 02:45:15,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828891871] [2020-10-20 02:45:15,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:15,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-20 02:45:15,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:15,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 02:45:15,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:15,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:15,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-20 02:45:15,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124975522] [2020-10-20 02:45:15,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 02:45:15,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:15,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 02:45:15,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-20 02:45:15,223 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-10-20 02:45:15,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:15,580 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-10-20 02:45:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-20 02:45:15,581 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-20 02:45:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:15,582 INFO L225 Difference]: With dead ends: 91 [2020-10-20 02:45:15,583 INFO L226 Difference]: Without dead ends: 82 [2020-10-20 02:45:15,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-20 02:45:15,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-20 02:45:15,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-10-20 02:45:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-20 02:45:15,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-20 02:45:15,586 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-10-20 02:45:15,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:15,587 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-20 02:45:15,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 02:45:15,587 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-20 02:45:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 02:45:15,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:15,588 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:15,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:15,791 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:15,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:15,791 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-10-20 02:45:15,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:15,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610029426] [2020-10-20 02:45:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:15,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610029426] [2020-10-20 02:45:15,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278738439] [2020-10-20 02:45:15,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:15,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 02:45:15,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:15,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:15,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:15,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 02:45:15,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796042712] [2020-10-20 02:45:15,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 02:45:15,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:15,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 02:45:15,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-20 02:45:15,976 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-20 02:45:16,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:16,457 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-20 02:45:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-20 02:45:16,458 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-20 02:45:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:16,459 INFO L225 Difference]: With dead ends: 92 [2020-10-20 02:45:16,459 INFO L226 Difference]: Without dead ends: 83 [2020-10-20 02:45:16,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-20 02:45:16,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-20 02:45:16,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-10-20 02:45:16,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-20 02:45:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-20 02:45:16,463 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-10-20 02:45:16,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:16,463 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-20 02:45:16,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 02:45:16,464 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-20 02:45:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 02:45:16,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:16,465 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:16,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:16,673 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:16,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-10-20 02:45:16,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:16,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310566231] [2020-10-20 02:45:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:16,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310566231] [2020-10-20 02:45:16,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834012713] [2020-10-20 02:45:16,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:16,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:16,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:16,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 02:45:16,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:16,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:16,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:16,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 02:45:16,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547367236] [2020-10-20 02:45:16,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 02:45:16,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:16,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 02:45:16,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-20 02:45:16,880 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-10-20 02:45:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:17,286 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-10-20 02:45:17,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-20 02:45:17,286 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-20 02:45:17,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:17,287 INFO L225 Difference]: With dead ends: 80 [2020-10-20 02:45:17,288 INFO L226 Difference]: Without dead ends: 75 [2020-10-20 02:45:17,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-20 02:45:17,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-20 02:45:17,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-20 02:45:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-20 02:45:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-20 02:45:17,291 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-20 02:45:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:17,291 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-20 02:45:17,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 02:45:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-20 02:45:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 02:45:17,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:17,292 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:17,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-20 02:45:17,494 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:17,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:17,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-10-20 02:45:17,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:17,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535112486] [2020-10-20 02:45:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:17,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535112486] [2020-10-20 02:45:17,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688186560] [2020-10-20 02:45:17,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:17,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-20 02:45:17,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 02:45:17,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:17,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:17,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:17,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-20 02:45:17,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981098672] [2020-10-20 02:45:17,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 02:45:17,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:17,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 02:45:17,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-20 02:45:17,726 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-20 02:45:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:17,944 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-20 02:45:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 02:45:17,945 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-20 02:45:17,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:17,946 INFO L225 Difference]: With dead ends: 80 [2020-10-20 02:45:17,946 INFO L226 Difference]: Without dead ends: 74 [2020-10-20 02:45:17,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-20 02:45:17,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-20 02:45:17,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-20 02:45:17,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-20 02:45:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-20 02:45:17,949 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-10-20 02:45:17,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:17,950 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-20 02:45:17,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 02:45:17,950 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-20 02:45:17,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 02:45:17,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:17,951 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:18,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-20 02:45:18,152 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:18,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:18,153 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-10-20 02:45:18,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:18,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018546874] [2020-10-20 02:45:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:18,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018546874] [2020-10-20 02:45:18,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594550680] [2020-10-20 02:45:18,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:18,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:18,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:18,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 02:45:18,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:18,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:18,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:18,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-20 02:45:18,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025834685] [2020-10-20 02:45:18,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 02:45:18,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:18,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 02:45:18,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-20 02:45:18,346 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-10-20 02:45:18,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:18,845 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-20 02:45:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-20 02:45:18,845 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-20 02:45:18,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:18,846 INFO L225 Difference]: With dead ends: 93 [2020-10-20 02:45:18,847 INFO L226 Difference]: Without dead ends: 88 [2020-10-20 02:45:18,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-20 02:45:18,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-20 02:45:18,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-10-20 02:45:18,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-20 02:45:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-20 02:45:18,850 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-10-20 02:45:18,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:18,850 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-20 02:45:18,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 02:45:18,851 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-20 02:45:18,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 02:45:18,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:18,851 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:19,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-20 02:45:19,060 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:19,060 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-10-20 02:45:19,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:19,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831483277] [2020-10-20 02:45:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:19,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831483277] [2020-10-20 02:45:19,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938588170] [2020-10-20 02:45:19,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:19,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-20 02:45:19,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:19,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 02:45:19,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:19,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:19,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:19,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-20 02:45:19,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140535352] [2020-10-20 02:45:19,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 02:45:19,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:19,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 02:45:19,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-20 02:45:19,262 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-10-20 02:45:19,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:19,837 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-10-20 02:45:19,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-20 02:45:19,838 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-20 02:45:19,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:19,839 INFO L225 Difference]: With dead ends: 101 [2020-10-20 02:45:19,839 INFO L226 Difference]: Without dead ends: 92 [2020-10-20 02:45:19,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-20 02:45:19,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-20 02:45:19,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-20 02:45:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-20 02:45:19,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-20 02:45:19,846 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-10-20 02:45:19,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:19,846 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-20 02:45:19,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 02:45:19,847 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-20 02:45:19,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 02:45:19,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:19,847 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:20,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-20 02:45:20,049 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:20,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:20,049 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-10-20 02:45:20,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:20,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729325762] [2020-10-20 02:45:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:20,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729325762] [2020-10-20 02:45:20,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159907751] [2020-10-20 02:45:20,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:20,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-20 02:45:20,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:20,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 02:45:20,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:20,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 02:45:20,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-10-20 02:45:20,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673220479] [2020-10-20 02:45:20,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 02:45:20,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:20,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 02:45:20,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:20,257 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 8 states. [2020-10-20 02:45:20,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:20,279 INFO L93 Difference]: Finished difference Result 144 states and 324 transitions. [2020-10-20 02:45:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 02:45:20,280 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-20 02:45:20,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:20,280 INFO L225 Difference]: With dead ends: 144 [2020-10-20 02:45:20,280 INFO L226 Difference]: Without dead ends: 36 [2020-10-20 02:45:20,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:20,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-20 02:45:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-20 02:45:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-20 02:45:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 65 transitions. [2020-10-20 02:45:20,283 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 65 transitions. Word has length 19 [2020-10-20 02:45:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:20,283 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 65 transitions. [2020-10-20 02:45:20,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 02:45:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 65 transitions. [2020-10-20 02:45:20,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 02:45:20,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:20,286 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:20,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-20 02:45:20,493 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:20,494 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-10-20 02:45:20,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:20,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503814853] [2020-10-20 02:45:20,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:20,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503814853] [2020-10-20 02:45:20,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288503664] [2020-10-20 02:45:20,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:20,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 02:45:20,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:20,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 02:45:20,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2020-10-20 02:45:20,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83249700] [2020-10-20 02:45:20,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 02:45:20,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:20,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 02:45:20,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-20 02:45:20,630 INFO L87 Difference]: Start difference. First operand 36 states and 65 transitions. Second operand 8 states. [2020-10-20 02:45:20,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:20,641 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2020-10-20 02:45:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 02:45:20,642 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-20 02:45:20,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:20,642 INFO L225 Difference]: With dead ends: 56 [2020-10-20 02:45:20,642 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 02:45:20,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-20 02:45:20,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 02:45:20,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 02:45:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 02:45:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 02:45:20,643 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-20 02:45:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:20,643 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 02:45:20,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 02:45:20,644 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 02:45:20,644 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 02:45:20,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:20,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 02:45:20 BasicIcfg [2020-10-20 02:45:20,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 02:45:20,850 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 02:45:20,850 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 02:45:20,850 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 02:45:20,851 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 02:45:02" (3/4) ... [2020-10-20 02:45:20,854 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 02:45:20,861 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2020-10-20 02:45:20,862 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2020-10-20 02:45:20,866 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-10-20 02:45:20,866 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 02:45:20,867 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 02:45:20,867 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 02:45:20,904 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 02:45:20,904 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 02:45:20,906 INFO L168 Benchmark]: Toolchain (without parser) took 19608.58 ms. Allocated memory was 35.7 MB in the beginning and 105.9 MB in the end (delta: 70.3 MB). Free memory was 8.7 MB in the beginning and 19.9 MB in the end (delta: -11.2 MB). Peak memory consumption was 59.0 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:20,906 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 35.7 MB. Free memory is still 15.0 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 02:45:20,907 INFO L168 Benchmark]: CACSL2BoogieTranslator took 699.71 ms. Allocated memory was 35.7 MB in the beginning and 46.7 MB in the end (delta: 11.0 MB). Free memory was 7.8 MB in the beginning and 22.8 MB in the end (delta: -14.9 MB). Peak memory consumption was 9.0 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:20,907 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.22 ms. Allocated memory is still 46.7 MB. Free memory was 22.5 MB in the beginning and 20.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:20,908 INFO L168 Benchmark]: Boogie Preprocessor took 65.38 ms. Allocated memory is still 46.7 MB. Free memory was 20.5 MB in the beginning and 19.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:20,908 INFO L168 Benchmark]: RCFGBuilder took 415.14 ms. Allocated memory was 46.7 MB in the beginning and 47.2 MB in the end (delta: 524.3 kB). Free memory was 19.0 MB in the beginning and 15.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:20,909 INFO L168 Benchmark]: TraceAbstraction took 18284.50 ms. Allocated memory was 47.2 MB in the beginning and 105.9 MB in the end (delta: 58.7 MB). Free memory was 15.4 MB in the beginning and 23.0 MB in the end (delta: -7.6 MB). Peak memory consumption was 51.1 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:20,909 INFO L168 Benchmark]: Witness Printer took 54.50 ms. Allocated memory is still 105.9 MB. Free memory was 23.0 MB in the beginning and 19.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:20,914 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 35.7 MB. Free memory is still 15.0 MB. There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 699.71 ms. Allocated memory was 35.7 MB in the beginning and 46.7 MB in the end (delta: 11.0 MB). Free memory was 7.8 MB in the beginning and 22.8 MB in the end (delta: -14.9 MB). Peak memory consumption was 9.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 75.22 ms. Allocated memory is still 46.7 MB. Free memory was 22.5 MB in the beginning and 20.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 65.38 ms. Allocated memory is still 46.7 MB. Free memory was 20.5 MB in the beginning and 19.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 415.14 ms. Allocated memory was 46.7 MB in the beginning and 47.2 MB in the end (delta: 524.3 kB). Free memory was 19.0 MB in the beginning and 15.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 18284.50 ms. Allocated memory was 47.2 MB in the beginning and 105.9 MB in the end (delta: 58.7 MB). Free memory was 15.4 MB in the beginning and 23.0 MB in the end (delta: -7.6 MB). Peak memory consumption was 51.1 MB. Max. memory is 14.3 GB. * Witness Printer took 54.50 ms. Allocated memory is still 105.9 MB. Free memory was 23.0 MB in the beginning and 19.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 785 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.1s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - PositiveResult [Line: 685]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.1s, OverallIterations: 27, TraceHistogramMax: 6, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 441 SDtfs, 1059 SDslu, 1265 SDs, 0 SdLazy, 1367 SolverSat, 648 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 770 GetRequests, 277 SyntacticMatches, 16 SemanticMatches, 477 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 27 MinimizatonAttempts, 394 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 704 NumberOfCodeBlocks, 704 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 655 ConstructedInterpolants, 0 QuantifiedInterpolants, 37671 SizeOfPredicates, 136 NumberOfNonLiveVariables, 2486 ConjunctsInSsa, 232 ConjunctsInUnsatCore, 49 InterpolantComputations, 7 PerfectInterpolantSequences, 82/460 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...