./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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-longer-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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e24917ef8695200a643e71e238ee3c2cc9fb2120 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:57:14,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:57:14,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:57:14,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:57:14,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:57:14,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:57:14,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:57:14,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:57:14,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:57:14,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:57:14,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:57:14,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:57:14,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:57:14,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:57:14,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:57:14,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:57:14,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:57:14,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:57:14,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:57:14,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:57:14,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:57:14,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:57:14,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:57:14,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:57:14,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:57:14,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:57:14,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:57:14,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:57:14,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:57:14,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:57:14,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:57:14,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:57:14,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:57:14,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:57:14,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:57:14,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:57:14,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:57:14,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:57:14,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:57:14,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:57:14,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:57:14,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:57:14,626 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:57:14,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:57:14,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:57:14,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:57:14,629 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:57:14,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:57:14,630 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:57:14,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:57:14,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:57:14,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:57:14,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:57:14,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:57:14,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:57:14,633 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:57:14,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:57:14,634 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:57:14,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:57:14,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:57:14,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:57:14,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:57:14,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:57:14,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:57:14,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:57:14,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:57:14,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:57:14,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:57:14,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:57:14,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:57:14,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:57:14,638 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(__VERIFIER_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 -> e24917ef8695200a643e71e238ee3c2cc9fb2120 [2019-11-28 17:57:14,981 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:57:14,998 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:57:15,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:57:15,004 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:57:15,005 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:57:15,006 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longer-1.i [2019-11-28 17:57:15,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56aad6023/43dfb7f7518142269028c4db2356ec41/FLAGedbc78fb9 [2019-11-28 17:57:15,596 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:57:15,598 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i [2019-11-28 17:57:15,615 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56aad6023/43dfb7f7518142269028c4db2356ec41/FLAGedbc78fb9 [2019-11-28 17:57:15,895 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56aad6023/43dfb7f7518142269028c4db2356ec41 [2019-11-28 17:57:15,898 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:57:15,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:57:15,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:57:15,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:57:15,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:57:15,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:57:15" (1/1) ... [2019-11-28 17:57:15,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21aba202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:15, skipping insertion in model container [2019-11-28 17:57:15,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:57:15" (1/1) ... [2019-11-28 17:57:15,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:57:15,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:57:16,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:57:16,474 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:57:16,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:57:16,628 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:57:16,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:16 WrapperNode [2019-11-28 17:57:16,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:57:16,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:57:16,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:57:16,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:57:16,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:16" (1/1) ... [2019-11-28 17:57:16,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:16" (1/1) ... [2019-11-28 17:57:16,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:57:16,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:57:16,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:57:16,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:57:16,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:16" (1/1) ... [2019-11-28 17:57:16,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:16" (1/1) ... [2019-11-28 17:57:16,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:16" (1/1) ... [2019-11-28 17:57:16,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:16" (1/1) ... [2019-11-28 17:57:16,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:16" (1/1) ... [2019-11-28 17:57:16,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:16" (1/1) ... [2019-11-28 17:57:16,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:16" (1/1) ... [2019-11-28 17:57:16,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:57:16,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:57:16,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:57:16,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:57:16,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:16" (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 [2019-11-28 17:57:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-11-28 17:57:16,778 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-11-28 17:57:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-11-28 17:57:16,779 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-11-28 17:57:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 17:57:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-11-28 17:57:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 17:57:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 17:57:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-11-28 17:57:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:57:16,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:57:16,782 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-11-28 17:57:17,132 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:57:17,132 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-28 17:57:17,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:57:17 BoogieIcfgContainer [2019-11-28 17:57:17,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:57:17,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:57:17,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:57:17,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:57:17,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:57:15" (1/3) ... [2019-11-28 17:57:17,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54fb2e0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:57:17, skipping insertion in model container [2019-11-28 17:57:17,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:16" (2/3) ... [2019-11-28 17:57:17,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54fb2e0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:57:17, skipping insertion in model container [2019-11-28 17:57:17,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:57:17" (3/3) ... [2019-11-28 17:57:17,143 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2019-11-28 17:57:17,153 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-11-28 17:57:17,153 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:57:17,161 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:57:17,162 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-11-28 17:57:17,189 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,189 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,190 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,190 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,191 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,191 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,191 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,191 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,192 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,192 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,192 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,192 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,192 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,193 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,193 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,194 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,194 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,194 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,195 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,195 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,195 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,196 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,196 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,196 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,197 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,197 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,197 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,198 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:17,220 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-28 17:57:17,238 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:57:17,238 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:57:17,238 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:57:17,238 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:57:17,239 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:57:17,239 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:57:17,239 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:57:17,239 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:57:17,251 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-11-28 17:57:17,253 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-11-28 17:57:17,290 INFO L134 PetriNetUnfolder]: 5/49 cut-off events. [2019-11-28 17:57:17,290 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-11-28 17:57:17,299 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 92 event pairs. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-11-28 17:57:17,307 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-11-28 17:57:17,323 INFO L134 PetriNetUnfolder]: 5/49 cut-off events. [2019-11-28 17:57:17,323 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-11-28 17:57:17,326 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 92 event pairs. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-11-28 17:57:17,328 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-11-28 17:57:17,329 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-11-28 17:57:18,460 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-11-28 17:57:18,598 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-11-28 17:57:18,599 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-11-28 17:57:18,602 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-11-28 17:57:18,619 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-11-28 17:57:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-11-28 17:57:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-28 17:57:18,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:18,636 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-28 17:57:18,636 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:18,644 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-11-28 17:57:18,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:18,654 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668806285] [2019-11-28 17:57:18,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:18,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668806285] [2019-11-28 17:57:18,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:57:18,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-11-28 17:57:18,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164597043] [2019-11-28 17:57:18,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 17:57:18,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:18,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 17:57:18,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 17:57:18,931 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-11-28 17:57:18,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:18,964 INFO L93 Difference]: Finished difference Result 44 states and 107 transitions. [2019-11-28 17:57:18,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 17:57:18,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-28 17:57:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:18,999 INFO L225 Difference]: With dead ends: 44 [2019-11-28 17:57:18,999 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 17:57:19,001 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 17:57:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 17:57:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 17:57:19,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:57:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 56 transitions. [2019-11-28 17:57:19,053 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 56 transitions. Word has length 5 [2019-11-28 17:57:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:19,053 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 56 transitions. [2019-11-28 17:57:19,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 17:57:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 56 transitions. [2019-11-28 17:57:19,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 17:57:19,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:19,055 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:19,055 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:19,059 INFO L82 PathProgramCache]: Analyzing trace with hash 232910220, now seen corresponding path program 1 times [2019-11-28 17:57:19,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:19,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578767667] [2019-11-28 17:57:19,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:19,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578767667] [2019-11-28 17:57:19,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:57:19,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 17:57:19,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067896464] [2019-11-28 17:57:19,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 17:57:19,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:19,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 17:57:19,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:57:19,263 INFO L87 Difference]: Start difference. First operand 26 states and 56 transitions. Second operand 4 states. [2019-11-28 17:57:19,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:19,315 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-11-28 17:57:19,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:57:19,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-28 17:57:19,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:19,317 INFO L225 Difference]: With dead ends: 40 [2019-11-28 17:57:19,317 INFO L226 Difference]: Without dead ends: 30 [2019-11-28 17:57:19,318 INFO L630 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 [2019-11-28 17:57:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-28 17:57:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-11-28 17:57:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:57:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-11-28 17:57:19,325 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 7 [2019-11-28 17:57:19,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:19,325 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-11-28 17:57:19,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 17:57:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-11-28 17:57:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:57:19,327 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:19,327 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:19,327 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:19,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:19,328 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-11-28 17:57:19,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:19,329 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133451394] [2019-11-28 17:57:19,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:19,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133451394] [2019-11-28 17:57:19,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:57:19,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 17:57:19,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529827248] [2019-11-28 17:57:19,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:57:19,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:19,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:57:19,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:57:19,436 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 5 states. [2019-11-28 17:57:19,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:19,493 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-11-28 17:57:19,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:57:19,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 17:57:19,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:19,496 INFO L225 Difference]: With dead ends: 38 [2019-11-28 17:57:19,496 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 17:57:19,496 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:57:19,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 17:57:19,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-11-28 17:57:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-28 17:57:19,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-11-28 17:57:19,510 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-11-28 17:57:19,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:19,510 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-11-28 17:57:19,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:57:19,511 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-11-28 17:57:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 17:57:19,512 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:19,512 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:19,513 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:19,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:19,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 2 times [2019-11-28 17:57:19,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:19,517 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790747386] [2019-11-28 17:57:19,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:19,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790747386] [2019-11-28 17:57:19,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241049358] [2019-11-28 17:57:19,653 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:19,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:57:19,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:19,760 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 17:57:19,768 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:19,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:19,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-28 17:57:19,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828528608] [2019-11-28 17:57:19,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 17:57:19,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:19,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 17:57:19,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:57:19,814 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 7 states. [2019-11-28 17:57:19,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:19,906 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-11-28 17:57:19,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:57:19,908 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-28 17:57:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:19,909 INFO L225 Difference]: With dead ends: 37 [2019-11-28 17:57:19,909 INFO L226 Difference]: Without dead ends: 33 [2019-11-28 17:57:19,909 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:57:19,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-28 17:57:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-28 17:57:19,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-28 17:57:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 67 transitions. [2019-11-28 17:57:19,921 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 67 transitions. Word has length 10 [2019-11-28 17:57:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:19,921 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 67 transitions. [2019-11-28 17:57:19,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 17:57:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 67 transitions. [2019-11-28 17:57:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 17:57:19,922 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:19,923 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:20,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:20,124 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:20,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 3 times [2019-11-28 17:57:20,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:20,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519851442] [2019-11-28 17:57:20,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:20,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519851442] [2019-11-28 17:57:20,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223993978] [2019-11-28 17:57:20,211 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:20,266 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-28 17:57:20,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:20,268 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 17:57:20,269 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:20,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:20,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-28 17:57:20,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914764170] [2019-11-28 17:57:20,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:57:20,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:20,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:57:20,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:57:20,301 INFO L87 Difference]: Start difference. First operand 32 states and 67 transitions. Second operand 8 states. [2019-11-28 17:57:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:20,415 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-11-28 17:57:20,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:57:20,415 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-11-28 17:57:20,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:20,416 INFO L225 Difference]: With dead ends: 41 [2019-11-28 17:57:20,416 INFO L226 Difference]: Without dead ends: 37 [2019-11-28 17:57:20,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:57:20,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-28 17:57:20,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-11-28 17:57:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:57:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-11-28 17:57:20,421 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 11 [2019-11-28 17:57:20,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:20,422 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-11-28 17:57:20,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:57:20,422 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-11-28 17:57:20,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 17:57:20,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:20,423 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:20,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:20,631 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash -466461753, now seen corresponding path program 4 times [2019-11-28 17:57:20,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:20,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72170550] [2019-11-28 17:57:20,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:20,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72170550] [2019-11-28 17:57:20,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926658723] [2019-11-28 17:57:20,730 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:20,782 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:57:20,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:20,783 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 17:57:20,784 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:20,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:20,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-28 17:57:20,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892870075] [2019-11-28 17:57:20,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:57:20,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:20,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:57:20,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:57:20,804 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 8 states. [2019-11-28 17:57:20,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:20,902 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-11-28 17:57:20,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:57:20,903 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-11-28 17:57:20,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:20,904 INFO L225 Difference]: With dead ends: 46 [2019-11-28 17:57:20,904 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 17:57:20,904 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:57:20,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 17:57:20,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2019-11-28 17:57:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 17:57:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2019-11-28 17:57:20,910 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 12 [2019-11-28 17:57:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:20,911 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2019-11-28 17:57:20,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:57:20,911 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2019-11-28 17:57:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 17:57:20,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:20,912 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:21,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:21,117 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:21,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973298, now seen corresponding path program 5 times [2019-11-28 17:57:21,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:21,119 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817701224] [2019-11-28 17:57:21,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:21,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817701224] [2019-11-28 17:57:21,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209594949] [2019-11-28 17:57:21,194 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:21,244 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-11-28 17:57:21,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:21,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 17:57:21,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:21,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:21,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 17:57:21,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646736247] [2019-11-28 17:57:21,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 17:57:21,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:21,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 17:57:21,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:57:21,279 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand 9 states. [2019-11-28 17:57:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:21,377 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-11-28 17:57:21,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:57:21,378 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-11-28 17:57:21,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:21,379 INFO L225 Difference]: With dead ends: 46 [2019-11-28 17:57:21,379 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 17:57:21,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:57:21,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 17:57:21,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2019-11-28 17:57:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-28 17:57:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-11-28 17:57:21,387 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 13 [2019-11-28 17:57:21,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:21,388 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-11-28 17:57:21,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 17:57:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-11-28 17:57:21,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 17:57:21,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:21,391 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:21,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:21,597 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:21,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:21,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1575404710, now seen corresponding path program 6 times [2019-11-28 17:57:21,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:21,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521693617] [2019-11-28 17:57:21,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:21,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521693617] [2019-11-28 17:57:21,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382324673] [2019-11-28 17:57:21,729 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-28 17:57:21,785 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-28 17:57:21,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:21,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 17:57:21,791 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:21,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:21,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-28 17:57:21,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758494720] [2019-11-28 17:57:21,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:57:21,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:21,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:57:21,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:57:21,841 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 10 states. [2019-11-28 17:57:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:21,970 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-11-28 17:57:21,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 17:57:21,971 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-11-28 17:57:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:21,972 INFO L225 Difference]: With dead ends: 47 [2019-11-28 17:57:21,972 INFO L226 Difference]: Without dead ends: 39 [2019-11-28 17:57:21,973 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-11-28 17:57:21,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-28 17:57:21,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-11-28 17:57:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-28 17:57:21,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 77 transitions. [2019-11-28 17:57:21,977 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 77 transitions. Word has length 13 [2019-11-28 17:57:21,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:21,977 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 77 transitions. [2019-11-28 17:57:21,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:57:21,978 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 77 transitions. [2019-11-28 17:57:21,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 17:57:21,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:21,978 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:22,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:22,182 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:22,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:22,183 INFO L82 PathProgramCache]: Analyzing trace with hash 452443059, now seen corresponding path program 7 times [2019-11-28 17:57:22,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:22,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457919099] [2019-11-28 17:57:22,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:22,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457919099] [2019-11-28 17:57:22,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447630310] [2019-11-28 17:57:22,280 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-28 17:57:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:22,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-28 17:57:22,325 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:22,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:22,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-28 17:57:22,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992467741] [2019-11-28 17:57:22,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 17:57:22,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:22,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 17:57:22,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:57:22,343 INFO L87 Difference]: Start difference. First operand 37 states and 77 transitions. Second operand 11 states. [2019-11-28 17:57:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:22,481 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-11-28 17:57:22,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 17:57:22,481 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-11-28 17:57:22,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:22,482 INFO L225 Difference]: With dead ends: 46 [2019-11-28 17:57:22,482 INFO L226 Difference]: Without dead ends: 38 [2019-11-28 17:57:22,483 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-11-28 17:57:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-28 17:57:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2019-11-28 17:57:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:57:22,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-11-28 17:57:22,486 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 14 [2019-11-28 17:57:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:22,487 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-11-28 17:57:22,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 17:57:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-11-28 17:57:22,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 17:57:22,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:22,488 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:22,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:22,689 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:22,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 8 times [2019-11-28 17:57:22,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:22,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507193614] [2019-11-28 17:57:22,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:22,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507193614] [2019-11-28 17:57:22,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514246708] [2019-11-28 17:57:22,795 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-28 17:57:22,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:57:22,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:22,846 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 17:57:22,847 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:22,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:22,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-28 17:57:22,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057139300] [2019-11-28 17:57:22,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 17:57:22,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:22,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 17:57:22,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:57:22,863 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 11 states. [2019-11-28 17:57:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:23,051 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-11-28 17:57:23,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 17:57:23,052 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-11-28 17:57:23,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:23,052 INFO L225 Difference]: With dead ends: 45 [2019-11-28 17:57:23,053 INFO L226 Difference]: Without dead ends: 39 [2019-11-28 17:57:23,053 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:57:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-28 17:57:23,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2019-11-28 17:57:23,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 17:57:23,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-11-28 17:57:23,057 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 14 [2019-11-28 17:57:23,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:23,057 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-11-28 17:57:23,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 17:57:23,057 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-11-28 17:57:23,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 17:57:23,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:23,060 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:23,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:23,265 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:23,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:23,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833246, now seen corresponding path program 9 times [2019-11-28 17:57:23,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:23,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557843945] [2019-11-28 17:57:23,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:23,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557843945] [2019-11-28 17:57:23,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877994373] [2019-11-28 17:57:23,383 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-28 17:57:23,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 17:57:23,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:23,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 17:57:23,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:23,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:23,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-28 17:57:23,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069749141] [2019-11-28 17:57:23,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 17:57:23,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:23,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 17:57:23,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:57:23,479 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 12 states. [2019-11-28 17:57:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:23,842 INFO L93 Difference]: Finished difference Result 49 states and 100 transitions. [2019-11-28 17:57:23,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 17:57:23,842 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-11-28 17:57:23,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:23,843 INFO L225 Difference]: With dead ends: 49 [2019-11-28 17:57:23,843 INFO L226 Difference]: Without dead ends: 45 [2019-11-28 17:57:23,844 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2019-11-28 17:57:23,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-28 17:57:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-11-28 17:57:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-28 17:57:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 87 transitions. [2019-11-28 17:57:23,848 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 87 transitions. Word has length 15 [2019-11-28 17:57:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:23,849 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 87 transitions. [2019-11-28 17:57:23,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 17:57:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 87 transitions. [2019-11-28 17:57:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 17:57:23,850 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:23,850 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:24,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:24,055 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:24,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:24,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 10 times [2019-11-28 17:57:24,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:24,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099396859] [2019-11-28 17:57:24,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:24,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099396859] [2019-11-28 17:57:24,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119646394] [2019-11-28 17:57:24,179 INFO L92 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 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 [2019-11-28 17:57:24,241 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:57:24,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:24,242 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 17:57:24,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:24,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:24,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-28 17:57:24,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384753085] [2019-11-28 17:57:24,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 17:57:24,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:24,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 17:57:24,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:57:24,273 INFO L87 Difference]: Start difference. First operand 42 states and 87 transitions. Second operand 13 states. [2019-11-28 17:57:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:24,508 INFO L93 Difference]: Finished difference Result 51 states and 104 transitions. [2019-11-28 17:57:24,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 17:57:24,509 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-11-28 17:57:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:24,510 INFO L225 Difference]: With dead ends: 51 [2019-11-28 17:57:24,510 INFO L226 Difference]: Without dead ends: 45 [2019-11-28 17:57:24,510 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2019-11-28 17:57:24,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-28 17:57:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-28 17:57:24,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-28 17:57:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 91 transitions. [2019-11-28 17:57:24,516 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 91 transitions. Word has length 16 [2019-11-28 17:57:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:24,517 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 91 transitions. [2019-11-28 17:57:24,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 17:57:24,517 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 91 transitions. [2019-11-28 17:57:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 17:57:24,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:24,518 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:24,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:24,722 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:24,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:24,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090750, now seen corresponding path program 11 times [2019-11-28 17:57:24,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:24,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618177958] [2019-11-28 17:57:24,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:24,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618177958] [2019-11-28 17:57:24,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433966525] [2019-11-28 17:57:24,845 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:24,902 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-28 17:57:24,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:24,904 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 17:57:24,905 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:24,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:24,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-28 17:57:24,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928427959] [2019-11-28 17:57:24,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 17:57:24,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:24,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 17:57:24,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:57:24,935 INFO L87 Difference]: Start difference. First operand 44 states and 91 transitions. Second operand 13 states. [2019-11-28 17:57:25,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:25,133 INFO L93 Difference]: Finished difference Result 54 states and 110 transitions. [2019-11-28 17:57:25,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 17:57:25,133 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2019-11-28 17:57:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:25,134 INFO L225 Difference]: With dead ends: 54 [2019-11-28 17:57:25,134 INFO L226 Difference]: Without dead ends: 49 [2019-11-28 17:57:25,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2019-11-28 17:57:25,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-28 17:57:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2019-11-28 17:57:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-28 17:57:25,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 93 transitions. [2019-11-28 17:57:25,146 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 93 transitions. Word has length 17 [2019-11-28 17:57:25,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:25,147 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 93 transitions. [2019-11-28 17:57:25,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 17:57:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 93 transitions. [2019-11-28 17:57:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 17:57:25,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:25,152 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:25,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:25,353 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:25,354 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 12 times [2019-11-28 17:57:25,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:25,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509895582] [2019-11-28 17:57:25,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:25,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509895582] [2019-11-28 17:57:25,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893730445] [2019-11-28 17:57:25,544 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:25,611 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-28 17:57:25,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:25,612 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-28 17:57:25,614 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:25,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:25,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-28 17:57:25,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667060946] [2019-11-28 17:57:25,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 17:57:25,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:25,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 17:57:25,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:57:25,641 INFO L87 Difference]: Start difference. First operand 45 states and 93 transitions. Second operand 15 states. [2019-11-28 17:57:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:25,871 INFO L93 Difference]: Finished difference Result 54 states and 110 transitions. [2019-11-28 17:57:25,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 17:57:25,871 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-11-28 17:57:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:25,872 INFO L225 Difference]: With dead ends: 54 [2019-11-28 17:57:25,872 INFO L226 Difference]: Without dead ends: 46 [2019-11-28 17:57:25,872 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2019-11-28 17:57:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-28 17:57:25,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 30. [2019-11-28 17:57:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-28 17:57:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-11-28 17:57:25,876 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 18 [2019-11-28 17:57:25,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:25,876 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-11-28 17:57:25,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 17:57:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-11-28 17:57:25,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 17:57:25,877 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:25,877 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:26,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:26,081 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:26,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:26,081 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 13 times [2019-11-28 17:57:26,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:26,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229089] [2019-11-28 17:57:26,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:26,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229089] [2019-11-28 17:57:26,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768582433] [2019-11-28 17:57:26,216 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:26,263 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-28 17:57:26,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:26,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:26,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-28 17:57:26,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803256102] [2019-11-28 17:57:26,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 17:57:26,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:26,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 17:57:26,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:57:26,297 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 15 states. [2019-11-28 17:57:26,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:26,541 INFO L93 Difference]: Finished difference Result 54 states and 110 transitions. [2019-11-28 17:57:26,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-28 17:57:26,541 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-11-28 17:57:26,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:26,542 INFO L225 Difference]: With dead ends: 54 [2019-11-28 17:57:26,542 INFO L226 Difference]: Without dead ends: 50 [2019-11-28 17:57:26,543 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2019-11-28 17:57:26,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-28 17:57:26,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2019-11-28 17:57:26,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-28 17:57:26,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 99 transitions. [2019-11-28 17:57:26,547 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 99 transitions. Word has length 18 [2019-11-28 17:57:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:26,547 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 99 transitions. [2019-11-28 17:57:26,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 17:57:26,547 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 99 transitions. [2019-11-28 17:57:26,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-28 17:57:26,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:26,548 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:26,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:26,752 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:26,752 INFO L82 PathProgramCache]: Analyzing trace with hash -2080307442, now seen corresponding path program 14 times [2019-11-28 17:57:26,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:26,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328870717] [2019-11-28 17:57:26,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:26,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328870717] [2019-11-28 17:57:26,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139672910] [2019-11-28 17:57:26,890 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:26,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:57:26,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:26,949 INFO L264 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-28 17:57:26,950 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:26,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:26,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-28 17:57:26,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130945138] [2019-11-28 17:57:26,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 17:57:26,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:26,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 17:57:26,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-11-28 17:57:26,972 INFO L87 Difference]: Start difference. First operand 48 states and 99 transitions. Second operand 16 states. [2019-11-28 17:57:27,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:27,226 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-11-28 17:57:27,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-28 17:57:27,231 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-11-28 17:57:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:27,232 INFO L225 Difference]: With dead ends: 57 [2019-11-28 17:57:27,232 INFO L226 Difference]: Without dead ends: 53 [2019-11-28 17:57:27,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2019-11-28 17:57:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-28 17:57:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2019-11-28 17:57:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-28 17:57:27,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-11-28 17:57:27,236 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 19 [2019-11-28 17:57:27,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:27,237 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-11-28 17:57:27,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 17:57:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-11-28 17:57:27,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-28 17:57:27,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:27,238 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:27,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:27,445 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:27,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:27,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1656842535, now seen corresponding path program 15 times [2019-11-28 17:57:27,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:27,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684579437] [2019-11-28 17:57:27,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:27,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684579437] [2019-11-28 17:57:27,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593221520] [2019-11-28 17:57:27,580 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:27,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-28 17:57:27,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:27,658 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 17:57:27,660 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:27,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:27,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-28 17:57:27,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338514640] [2019-11-28 17:57:27,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 17:57:27,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:27,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 17:57:27,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-11-28 17:57:27,685 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 16 states. [2019-11-28 17:57:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:27,941 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-11-28 17:57:27,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-28 17:57:27,942 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-11-28 17:57:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:27,943 INFO L225 Difference]: With dead ends: 57 [2019-11-28 17:57:27,943 INFO L226 Difference]: Without dead ends: 53 [2019-11-28 17:57:27,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2019-11-28 17:57:27,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-28 17:57:27,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-11-28 17:57:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-28 17:57:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 103 transitions. [2019-11-28 17:57:27,948 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 103 transitions. Word has length 20 [2019-11-28 17:57:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:27,948 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 103 transitions. [2019-11-28 17:57:27,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 17:57:27,948 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 103 transitions. [2019-11-28 17:57:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-28 17:57:27,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:27,949 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:28,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:28,153 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1656842783, now seen corresponding path program 16 times [2019-11-28 17:57:28,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:28,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681640869] [2019-11-28 17:57:28,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:28,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681640869] [2019-11-28 17:57:28,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642994833] [2019-11-28 17:57:28,309 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:28,391 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:57:28,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:28,392 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-28 17:57:28,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:28,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:28,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-28 17:57:28,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726271466] [2019-11-28 17:57:28,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-28 17:57:28,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:28,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-28 17:57:28,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2019-11-28 17:57:28,432 INFO L87 Difference]: Start difference. First operand 50 states and 103 transitions. Second operand 17 states. [2019-11-28 17:57:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:28,841 INFO L93 Difference]: Finished difference Result 59 states and 120 transitions. [2019-11-28 17:57:28,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-28 17:57:28,842 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-11-28 17:57:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:28,842 INFO L225 Difference]: With dead ends: 59 [2019-11-28 17:57:28,843 INFO L226 Difference]: Without dead ends: 53 [2019-11-28 17:57:28,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2019-11-28 17:57:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-28 17:57:28,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-11-28 17:57:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-28 17:57:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 107 transitions. [2019-11-28 17:57:28,846 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 107 transitions. Word has length 20 [2019-11-28 17:57:28,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:28,847 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 107 transitions. [2019-11-28 17:57:28,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-28 17:57:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 107 transitions. [2019-11-28 17:57:28,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 17:57:28,847 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:28,848 INFO L410 BasicCegarLoop]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:29,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:29,051 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:29,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:29,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2015657298, now seen corresponding path program 17 times [2019-11-28 17:57:29,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:29,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681970480] [2019-11-28 17:57:29,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:29,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681970480] [2019-11-28 17:57:29,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536886529] [2019-11-28 17:57:29,204 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:29,271 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-28 17:57:29,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:29,272 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-28 17:57:29,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:29,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:29,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-28 17:57:29,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864151419] [2019-11-28 17:57:29,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-28 17:57:29,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:29,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-28 17:57:29,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-11-28 17:57:29,300 INFO L87 Difference]: Start difference. First operand 52 states and 107 transitions. Second operand 17 states. [2019-11-28 17:57:29,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:29,613 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-11-28 17:57:29,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-28 17:57:29,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2019-11-28 17:57:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:29,614 INFO L225 Difference]: With dead ends: 57 [2019-11-28 17:57:29,614 INFO L226 Difference]: Without dead ends: 53 [2019-11-28 17:57:29,615 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2019-11-28 17:57:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-28 17:57:29,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2019-11-28 17:57:29,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 17:57:29,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2019-11-28 17:57:29,618 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 21 [2019-11-28 17:57:29,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:29,618 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2019-11-28 17:57:29,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-28 17:57:29,618 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2019-11-28 17:57:29,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 17:57:29,619 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:29,619 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:29,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:29,824 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:29,824 INFO L82 PathProgramCache]: Analyzing trace with hash -2015657050, now seen corresponding path program 18 times [2019-11-28 17:57:29,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:29,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186813706] [2019-11-28 17:57:29,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:29,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186813706] [2019-11-28 17:57:29,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474068638] [2019-11-28 17:57:29,990 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:30,065 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-28 17:57:30,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:30,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-28 17:57:30,072 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:30,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:30,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-28 17:57:30,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135910188] [2019-11-28 17:57:30,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-28 17:57:30,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:30,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-28 17:57:30,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:57:30,110 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand 18 states. [2019-11-28 17:57:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:30,407 INFO L93 Difference]: Finished difference Result 59 states and 120 transitions. [2019-11-28 17:57:30,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-28 17:57:30,412 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-11-28 17:57:30,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:30,413 INFO L225 Difference]: With dead ends: 59 [2019-11-28 17:57:30,413 INFO L226 Difference]: Without dead ends: 53 [2019-11-28 17:57:30,413 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=647, Unknown=0, NotChecked=0, Total=930 [2019-11-28 17:57:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-28 17:57:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2019-11-28 17:57:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-28 17:57:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-11-28 17:57:30,416 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 21 [2019-11-28 17:57:30,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:30,416 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-11-28 17:57:30,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-28 17:57:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-11-28 17:57:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-28 17:57:30,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:30,417 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:30,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:30,618 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:30,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:30,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1206950281, now seen corresponding path program 19 times [2019-11-28 17:57:30,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:30,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95534544] [2019-11-28 17:57:30,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:30,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95534544] [2019-11-28 17:57:30,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358905351] [2019-11-28 17:57:30,780 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:30,834 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-28 17:57:30,835 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:30,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:30,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-28 17:57:30,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994572533] [2019-11-28 17:57:30,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-28 17:57:30,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:30,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-28 17:57:30,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2019-11-28 17:57:30,886 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 19 states. [2019-11-28 17:57:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:31,240 INFO L93 Difference]: Finished difference Result 61 states and 124 transitions. [2019-11-28 17:57:31,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-28 17:57:31,248 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-11-28 17:57:31,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:31,249 INFO L225 Difference]: With dead ends: 61 [2019-11-28 17:57:31,249 INFO L226 Difference]: Without dead ends: 55 [2019-11-28 17:57:31,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=370, Invalid=752, Unknown=0, NotChecked=0, Total=1122 [2019-11-28 17:57:31,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-28 17:57:31,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 37. [2019-11-28 17:57:31,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-28 17:57:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 76 transitions. [2019-11-28 17:57:31,254 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 76 transitions. Word has length 22 [2019-11-28 17:57:31,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:31,254 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 76 transitions. [2019-11-28 17:57:31,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-28 17:57:31,255 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 76 transitions. [2019-11-28 17:57:31,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-28 17:57:31,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:31,256 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:31,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:31,462 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:31,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:31,463 INFO L82 PathProgramCache]: Analyzing trace with hash -16172482, now seen corresponding path program 20 times [2019-11-28 17:57:31,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:31,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133655853] [2019-11-28 17:57:31,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:31,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133655853] [2019-11-28 17:57:31,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286236789] [2019-11-28 17:57:31,673 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:31,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:57:31,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:31,737 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-28 17:57:31,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:31,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:31,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-28 17:57:31,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255006181] [2019-11-28 17:57:31,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-28 17:57:31,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:31,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 17:57:31,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:57:31,763 INFO L87 Difference]: Start difference. First operand 37 states and 76 transitions. Second operand 20 states. [2019-11-28 17:57:32,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:32,120 INFO L93 Difference]: Finished difference Result 65 states and 132 transitions. [2019-11-28 17:57:32,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-28 17:57:32,121 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-11-28 17:57:32,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:32,121 INFO L225 Difference]: With dead ends: 65 [2019-11-28 17:57:32,122 INFO L226 Difference]: Without dead ends: 61 [2019-11-28 17:57:32,122 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=831, Unknown=0, NotChecked=0, Total=1190 [2019-11-28 17:57:32,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-28 17:57:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-11-28 17:57:32,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-28 17:57:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 119 transitions. [2019-11-28 17:57:32,126 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 119 transitions. Word has length 23 [2019-11-28 17:57:32,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:32,126 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 119 transitions. [2019-11-28 17:57:32,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-28 17:57:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 119 transitions. [2019-11-28 17:57:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-28 17:57:32,128 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:32,128 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:32,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:32,332 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:32,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:32,332 INFO L82 PathProgramCache]: Analyzing trace with hash -238048049, now seen corresponding path program 21 times [2019-11-28 17:57:32,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:32,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288592153] [2019-11-28 17:57:32,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:32,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288592153] [2019-11-28 17:57:32,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520989765] [2019-11-28 17:57:32,517 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:32,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-28 17:57:32,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:32,601 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 17:57:32,602 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:32,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:32,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-28 17:57:32,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119352915] [2019-11-28 17:57:32,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-28 17:57:32,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:32,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-28 17:57:32,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2019-11-28 17:57:32,628 INFO L87 Difference]: Start difference. First operand 58 states and 119 transitions. Second operand 21 states. [2019-11-28 17:57:33,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:33,059 INFO L93 Difference]: Finished difference Result 67 states and 136 transitions. [2019-11-28 17:57:33,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-28 17:57:33,060 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-11-28 17:57:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:33,060 INFO L225 Difference]: With dead ends: 67 [2019-11-28 17:57:33,060 INFO L226 Difference]: Without dead ends: 61 [2019-11-28 17:57:33,061 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=432, Invalid=974, Unknown=0, NotChecked=0, Total=1406 [2019-11-28 17:57:33,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-28 17:57:33,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-11-28 17:57:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-28 17:57:33,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 123 transitions. [2019-11-28 17:57:33,064 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 123 transitions. Word has length 24 [2019-11-28 17:57:33,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:33,065 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 123 transitions. [2019-11-28 17:57:33,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-28 17:57:33,065 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 123 transitions. [2019-11-28 17:57:33,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-28 17:57:33,065 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:33,066 INFO L410 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:33,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:33,266 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:33,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:33,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1638115806, now seen corresponding path program 22 times [2019-11-28 17:57:33,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:33,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15646810] [2019-11-28 17:57:33,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:33,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15646810] [2019-11-28 17:57:33,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457465608] [2019-11-28 17:57:33,463 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:33,527 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:57:33,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:33,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-28 17:57:33,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:33,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:33,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-28 17:57:33,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647502724] [2019-11-28 17:57:33,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-28 17:57:33,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:33,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-28 17:57:33,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2019-11-28 17:57:33,568 INFO L87 Difference]: Start difference. First operand 60 states and 123 transitions. Second operand 21 states. [2019-11-28 17:57:33,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:33,974 INFO L93 Difference]: Finished difference Result 70 states and 142 transitions. [2019-11-28 17:57:33,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-28 17:57:33,975 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2019-11-28 17:57:33,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:33,976 INFO L225 Difference]: With dead ends: 70 [2019-11-28 17:57:33,976 INFO L226 Difference]: Without dead ends: 65 [2019-11-28 17:57:33,977 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2019-11-28 17:57:33,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-28 17:57:33,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2019-11-28 17:57:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-28 17:57:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 125 transitions. [2019-11-28 17:57:33,979 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 125 transitions. Word has length 25 [2019-11-28 17:57:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:33,980 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 125 transitions. [2019-11-28 17:57:33,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-28 17:57:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 125 transitions. [2019-11-28 17:57:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-28 17:57:33,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:33,980 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:34,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:34,182 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:34,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:34,182 INFO L82 PathProgramCache]: Analyzing trace with hash -758009821, now seen corresponding path program 23 times [2019-11-28 17:57:34,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:34,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920931506] [2019-11-28 17:57:34,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:34,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920931506] [2019-11-28 17:57:34,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626914467] [2019-11-28 17:57:34,404 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:34,460 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-28 17:57:34,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:34,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-28 17:57:34,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:34,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:34,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-28 17:57:34,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660201725] [2019-11-28 17:57:34,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-28 17:57:34,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:34,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-28 17:57:34,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2019-11-28 17:57:34,503 INFO L87 Difference]: Start difference. First operand 61 states and 125 transitions. Second operand 23 states. [2019-11-28 17:57:34,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:34,969 INFO L93 Difference]: Finished difference Result 74 states and 150 transitions. [2019-11-28 17:57:34,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-28 17:57:34,970 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-11-28 17:57:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:34,971 INFO L225 Difference]: With dead ends: 74 [2019-11-28 17:57:34,971 INFO L226 Difference]: Without dead ends: 65 [2019-11-28 17:57:34,972 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2019-11-28 17:57:34,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-28 17:57:34,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2019-11-28 17:57:34,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-28 17:57:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 84 transitions. [2019-11-28 17:57:34,975 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 84 transitions. Word has length 26 [2019-11-28 17:57:34,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:34,976 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 84 transitions. [2019-11-28 17:57:34,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-28 17:57:34,976 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 84 transitions. [2019-11-28 17:57:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 17:57:34,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:34,977 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:35,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:35,181 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:35,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:35,181 INFO L82 PathProgramCache]: Analyzing trace with hash -698357774, now seen corresponding path program 24 times [2019-11-28 17:57:35,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:35,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180582721] [2019-11-28 17:57:35,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:35,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180582721] [2019-11-28 17:57:35,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336250255] [2019-11-28 17:57:35,453 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:35,535 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-28 17:57:35,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:35,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-28 17:57:35,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:35,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:35,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-28 17:57:35,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066199409] [2019-11-28 17:57:35,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-28 17:57:35,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:35,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-28 17:57:35,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2019-11-28 17:57:35,610 INFO L87 Difference]: Start difference. First operand 41 states and 84 transitions. Second operand 24 states. [2019-11-28 17:57:36,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:36,371 INFO L93 Difference]: Finished difference Result 80 states and 162 transitions. [2019-11-28 17:57:36,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-28 17:57:36,372 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-11-28 17:57:36,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:36,373 INFO L225 Difference]: With dead ends: 80 [2019-11-28 17:57:36,373 INFO L226 Difference]: Without dead ends: 71 [2019-11-28 17:57:36,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=634, Invalid=1258, Unknown=0, NotChecked=0, Total=1892 [2019-11-28 17:57:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-28 17:57:36,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 44. [2019-11-28 17:57:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-28 17:57:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-11-28 17:57:36,377 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 27 [2019-11-28 17:57:36,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:36,377 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-11-28 17:57:36,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-28 17:57:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-11-28 17:57:36,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-28 17:57:36,378 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:36,379 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:36,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:36,580 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:36,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1697011851, now seen corresponding path program 25 times [2019-11-28 17:57:36,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:36,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856102190] [2019-11-28 17:57:36,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:36,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856102190] [2019-11-28 17:57:36,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57483399] [2019-11-28 17:57:36,738 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:36,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 17:57:36,797 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:36,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 17:57:36,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2019-11-28 17:57:36,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151102494] [2019-11-28 17:57:36,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 17:57:36,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:36,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 17:57:36,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:57:36,813 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 13 states. [2019-11-28 17:57:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:36,838 INFO L93 Difference]: Finished difference Result 161 states and 296 transitions. [2019-11-28 17:57:36,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 17:57:36,839 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2019-11-28 17:57:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:36,839 INFO L225 Difference]: With dead ends: 161 [2019-11-28 17:57:36,839 INFO L226 Difference]: Without dead ends: 43 [2019-11-28 17:57:36,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:57:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-28 17:57:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-28 17:57:36,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-28 17:57:36,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 70 transitions. [2019-11-28 17:57:36,842 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 70 transitions. Word has length 28 [2019-11-28 17:57:36,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:36,842 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 70 transitions. [2019-11-28 17:57:36,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 17:57:36,842 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 70 transitions. [2019-11-28 17:57:36,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-28 17:57:36,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:36,844 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:37,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:37,048 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:37,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1697012099, now seen corresponding path program 26 times [2019-11-28 17:57:37,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:37,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634294210] [2019-11-28 17:57:37,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:37,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634294210] [2019-11-28 17:57:37,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354142472] [2019-11-28 17:57:37,159 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:37,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:57:37,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:37,215 INFO L264 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-28 17:57:37,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:37,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:37,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 34 [2019-11-28 17:57:37,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316571190] [2019-11-28 17:57:37,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-28 17:57:37,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:37,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-28 17:57:37,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2019-11-28 17:57:37,525 INFO L87 Difference]: Start difference. First operand 43 states and 70 transitions. Second operand 34 states. [2019-11-28 17:57:40,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:40,199 INFO L93 Difference]: Finished difference Result 247 states and 335 transitions. [2019-11-28 17:57:40,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2019-11-28 17:57:40,199 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 28 [2019-11-28 17:57:40,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:40,200 INFO L225 Difference]: With dead ends: 247 [2019-11-28 17:57:40,200 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:57:40,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6825 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4671, Invalid=16209, Unknown=0, NotChecked=0, Total=20880 [2019-11-28 17:57:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:57:40,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:57:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:57:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:57:40,208 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2019-11-28 17:57:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:40,208 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:57:40,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-28 17:57:40,209 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:57:40,209 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:57:40,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:40,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:57:40 BasicIcfg [2019-11-28 17:57:40,422 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:57:40,423 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:57:40,423 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:57:40,423 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:57:40,424 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:57:17" (3/4) ... [2019-11-28 17:57:40,428 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:57:40,438 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2019-11-28 17:57:40,439 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2019-11-28 17:57:40,443 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-11-28 17:57:40,443 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-28 17:57:40,443 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 17:57:40,499 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:57:40,499 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:57:40,501 INFO L168 Benchmark]: Toolchain (without parser) took 24601.31 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 429.9 MB). Free memory was 959.0 MB in the beginning and 1.4 GB in the end (delta: -434.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:57:40,501 INFO L168 Benchmark]: CDTParser took 0.86 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:57:40,503 INFO L168 Benchmark]: CACSL2BoogieTranslator took 729.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.2 MB). Free memory was 959.0 MB in the beginning and 1.1 GB in the end (delta: -137.7 MB). Peak memory consumption was 25.9 MB. Max. memory is 11.5 GB. [2019-11-28 17:57:40,503 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:57:40,504 INFO L168 Benchmark]: Boogie Preprocessor took 29.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:57:40,504 INFO L168 Benchmark]: RCFGBuilder took 421.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2019-11-28 17:57:40,505 INFO L168 Benchmark]: TraceAbstraction took 23286.99 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 307.8 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -340.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:57:40,505 INFO L168 Benchmark]: Witness Printer took 76.68 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:57:40,507 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.86 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 729.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.2 MB). Free memory was 959.0 MB in the beginning and 1.1 GB in the end (delta: -137.7 MB). Peak memory consumption was 25.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 51.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 421.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 23286.99 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 307.8 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -340.0 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 76.68 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 53 ProgramPointsBefore, 16 ProgramPointsAfterwards, 51 TransitionsBefore, 14 TransitionsAfterwards, 740 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 380 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 604 CheckedPairsTotal, 41 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Result: SAFE, OverallTime: 23.1s, OverallIterations: 28, TraceHistogramMax: 11, AutomataDifference: 9.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 349 SDtfs, 953 SDslu, 1067 SDs, 0 SdLazy, 1500 SolverSat, 976 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1124 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 702 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9383 ImplicationChecksByTransitivity, 10.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=24, 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, 28 MinimizatonAttempts, 230 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 971 NumberOfCodeBlocks, 971 NumberOfCodeBlocksAsserted, 122 NumberOfCheckSat, 918 ConstructedInterpolants, 0 QuantifiedInterpolants, 56580 SizeOfPredicates, 248 NumberOfNonLiveVariables, 3200 ConjunctsInSsa, 437 ConjunctsInUnsatCore, 53 InterpolantComputations, 4 PerfectInterpolantSequences, 293/1874 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...