./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00eb8a8cfda98518c894b979d88e1c1dee8b976f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-03 12:40:02,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-03 12:40:02,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-03 12:40:02,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-03 12:40:02,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-03 12:40:02,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-03 12:40:02,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-03 12:40:02,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-03 12:40:02,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-03 12:40:02,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-03 12:40:02,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-03 12:40:02,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-03 12:40:02,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-03 12:40:03,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-03 12:40:03,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-03 12:40:03,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-03 12:40:03,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-03 12:40:03,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-03 12:40:03,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-03 12:40:03,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-03 12:40:03,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-03 12:40:03,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-03 12:40:03,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-03 12:40:03,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-03 12:40:03,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-03 12:40:03,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-03 12:40:03,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-03 12:40:03,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-03 12:40:03,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-03 12:40:03,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-03 12:40:03,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-03 12:40:03,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-03 12:40:03,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-03 12:40:03,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-03 12:40:03,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-03 12:40:03,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-03 12:40:03,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-03 12:40:03,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-03 12:40:03,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-03 12:40:03,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-03 12:40:03,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-03 12:40:03,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-03 12:40:03,071 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-03 12:40:03,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-03 12:40:03,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-03 12:40:03,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-03 12:40:03,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-03 12:40:03,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-03 12:40:03,075 INFO L138 SettingsManager]: * Use SBE=true [2021-10-03 12:40:03,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-03 12:40:03,075 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-03 12:40:03,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-03 12:40:03,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-03 12:40:03,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-03 12:40:03,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-03 12:40:03,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-03 12:40:03,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-03 12:40:03,077 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-03 12:40:03,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-03 12:40:03,078 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-03 12:40:03,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-03 12:40:03,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-03 12:40:03,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-03 12:40:03,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-03 12:40:03,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 12:40:03,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-03 12:40:03,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-03 12:40:03,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-03 12:40:03,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-03 12:40:03,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-03 12:40:03,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-03 12:40:03,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-03 12:40:03,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00eb8a8cfda98518c894b979d88e1c1dee8b976f [2021-10-03 12:40:03,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-03 12:40:03,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-03 12:40:03,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-03 12:40:03,488 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-03 12:40:03,489 INFO L275 PluginConnector]: CDTParser initialized [2021-10-03 12:40:03,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c [2021-10-03 12:40:03,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/340b01f0a/856f74b875db44abacaa87c22e2edeca/FLAGa5f3dcee3 [2021-10-03 12:40:04,228 INFO L306 CDTParser]: Found 1 translation units. [2021-10-03 12:40:04,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c [2021-10-03 12:40:04,229 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 12:40:04,229 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 12:40:04,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/340b01f0a/856f74b875db44abacaa87c22e2edeca/FLAGa5f3dcee3 [2021-10-03 12:40:04,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/340b01f0a/856f74b875db44abacaa87c22e2edeca [2021-10-03 12:40:04,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-03 12:40:04,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-03 12:40:04,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-03 12:40:04,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-03 12:40:04,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-03 12:40:04,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 12:40:04" (1/1) ... [2021-10-03 12:40:04,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dccc2df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:40:04, skipping insertion in model container [2021-10-03 12:40:04,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 12:40:04" (1/1) ... [2021-10-03 12:40:04,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-03 12:40:04,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-03 12:40:04,744 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 12:40:04,811 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c[3962,3975] [2021-10-03 12:40:04,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 12:40:04,832 INFO L203 MainTranslator]: Completed pre-run [2021-10-03 12:40:04,846 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 12:40:04,867 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c[3962,3975] [2021-10-03 12:40:04,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 12:40:04,895 INFO L208 MainTranslator]: Completed translation [2021-10-03 12:40:04,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:40:04 WrapperNode [2021-10-03 12:40:04,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-03 12:40:04,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-03 12:40:04,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-03 12:40:04,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-03 12:40:04,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:40:04" (1/1) ... [2021-10-03 12:40:04,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:40:04" (1/1) ... [2021-10-03 12:40:05,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-03 12:40:05,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-03 12:40:05,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-03 12:40:05,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-03 12:40:05,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:40:04" (1/1) ... [2021-10-03 12:40:05,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:40:04" (1/1) ... [2021-10-03 12:40:05,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:40:04" (1/1) ... [2021-10-03 12:40:05,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:40:04" (1/1) ... [2021-10-03 12:40:05,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:40:04" (1/1) ... [2021-10-03 12:40:05,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:40:04" (1/1) ... [2021-10-03 12:40:05,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:40:04" (1/1) ... [2021-10-03 12:40:05,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-03 12:40:05,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-03 12:40:05,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-03 12:40:05,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-03 12:40:05,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:40:04" (1/1) ... [2021-10-03 12:40:05,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 12:40:05,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:05,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-03 12:40:05,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-03 12:40:05,219 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-03 12:40:05,220 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-03 12:40:05,220 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-03 12:40:05,220 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-03 12:40:05,220 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-03 12:40:05,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-03 12:40:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-03 12:40:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-03 12:40:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-03 12:40:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-03 12:40:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-03 12:40:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-03 12:40:05,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-03 12:40:05,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-03 12:40:05,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-03 12:40:05,225 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-03 12:40:06,463 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-03 12:40:06,464 INFO L299 CfgBuilder]: Removed 48 assume(true) statements. [2021-10-03 12:40:06,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:40:06 BoogieIcfgContainer [2021-10-03 12:40:06,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-03 12:40:06,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-03 12:40:06,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-03 12:40:06,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-03 12:40:06,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 12:40:04" (1/3) ... [2021-10-03 12:40:06,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60320245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 12:40:06, skipping insertion in model container [2021-10-03 12:40:06,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:40:04" (2/3) ... [2021-10-03 12:40:06,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60320245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 12:40:06, skipping insertion in model container [2021-10-03 12:40:06,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:40:06" (3/3) ... [2021-10-03 12:40:06,480 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-1.wvr.c [2021-10-03 12:40:06,487 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-03 12:40:06,487 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-03 12:40:06,487 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-03 12:40:06,488 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-03 12:40:06,551 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,552 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,552 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,552 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,552 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,553 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,555 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,555 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,555 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,556 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,556 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,556 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,557 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,557 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,559 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,560 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,560 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,560 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,560 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,561 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,561 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,561 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,562 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,562 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,562 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,562 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,563 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,566 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,566 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,567 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,567 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,568 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,568 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,569 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,569 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,574 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,575 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,575 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,575 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,576 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,576 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,577 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,577 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,577 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,579 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,579 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,580 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,582 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,582 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,582 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,583 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,583 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,583 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,583 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,584 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,585 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,585 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,585 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,586 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,586 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,586 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,586 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,586 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,587 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,587 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,588 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,589 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,592 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,592 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,592 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,593 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,600 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,601 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,602 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,602 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,602 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,608 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,610 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,611 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,611 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,613 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,614 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,614 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,614 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,615 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,615 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,615 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,615 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,615 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,616 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,626 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,627 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,627 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,629 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,629 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,629 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,630 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,630 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,630 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,630 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,630 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,631 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:40:06,640 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-03 12:40:06,695 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-03 12:40:06,704 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-03 12:40:06,704 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-03 12:40:06,724 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-03 12:40:06,737 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 221 transitions, 466 flow [2021-10-03 12:40:06,741 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 221 transitions, 466 flow [2021-10-03 12:40:06,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 207 places, 221 transitions, 466 flow [2021-10-03 12:40:06,847 INFO L129 PetriNetUnfolder]: 24/218 cut-off events. [2021-10-03 12:40:06,852 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-03 12:40:06,863 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 218 events. 24/218 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 154 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 183. Up to 6 conditions per place. [2021-10-03 12:40:06,872 INFO L116 LiptonReduction]: Number of co-enabled transitions 2196 [2021-10-03 12:40:15,370 INFO L131 LiptonReduction]: Checked pairs total: 2138 [2021-10-03 12:40:15,370 INFO L133 LiptonReduction]: Total number of compositions: 224 [2021-10-03 12:40:15,380 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 29 transitions, 82 flow [2021-10-03 12:40:15,393 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-03 12:40:15,404 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:15,404 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:15,405 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:15,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:15,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1138705212, now seen corresponding path program 1 times [2021-10-03 12:40:15,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:15,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099940400] [2021-10-03 12:40:15,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:15,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:40:15,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:15,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099940400] [2021-10-03 12:40:15,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099940400] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:40:15,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:40:15,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-03 12:40:15,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430579598] [2021-10-03 12:40:15,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-03 12:40:15,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:15,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-03 12:40:15,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:40:15,845 INFO L87 Difference]: Start difference. First operand has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:15,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:15,891 INFO L93 Difference]: Finished difference Result 88 states and 251 transitions. [2021-10-03 12:40:15,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-03 12:40:15,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-03 12:40:15,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:15,905 INFO L225 Difference]: With dead ends: 88 [2021-10-03 12:40:15,905 INFO L226 Difference]: Without dead ends: 81 [2021-10-03 12:40:15,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:40:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-03 12:40:15,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-03 12:40:15,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.9125) internal successors, (233), 80 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 233 transitions. [2021-10-03 12:40:15,954 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 233 transitions. Word has length 19 [2021-10-03 12:40:15,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:15,955 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 233 transitions. [2021-10-03 12:40:15,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 233 transitions. [2021-10-03 12:40:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-03 12:40:15,958 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:15,958 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:15,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-03 12:40:15,959 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:15,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:15,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1713708857, now seen corresponding path program 1 times [2021-10-03 12:40:15,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:15,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598093495] [2021-10-03 12:40:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:15,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:40:16,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:16,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598093495] [2021-10-03 12:40:16,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598093495] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:40:16,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:40:16,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-03 12:40:16,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322510029] [2021-10-03 12:40:16,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-03 12:40:16,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:16,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-03 12:40:16,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:40:16,225 INFO L87 Difference]: Start difference. First operand 81 states and 233 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:16,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:16,251 INFO L93 Difference]: Finished difference Result 77 states and 211 transitions. [2021-10-03 12:40:16,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-03 12:40:16,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-03 12:40:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:16,253 INFO L225 Difference]: With dead ends: 77 [2021-10-03 12:40:16,255 INFO L226 Difference]: Without dead ends: 75 [2021-10-03 12:40:16,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:40:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-03 12:40:16,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-03 12:40:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.7837837837837838) internal successors, (206), 74 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 206 transitions. [2021-10-03 12:40:16,272 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 206 transitions. Word has length 20 [2021-10-03 12:40:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:16,272 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 206 transitions. [2021-10-03 12:40:16,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 206 transitions. [2021-10-03 12:40:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-03 12:40:16,283 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:16,283 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:16,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-03 12:40:16,284 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:16,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:16,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1232014929, now seen corresponding path program 1 times [2021-10-03 12:40:16,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:16,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355307482] [2021-10-03 12:40:16,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:16,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:40:16,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:16,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355307482] [2021-10-03 12:40:16,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355307482] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:40:16,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:40:16,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:40:16,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605837589] [2021-10-03 12:40:16,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:40:16,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:16,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:40:16,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:40:16,450 INFO L87 Difference]: Start difference. First operand 75 states and 206 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:16,487 INFO L93 Difference]: Finished difference Result 127 states and 334 transitions. [2021-10-03 12:40:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:40:16,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-03 12:40:16,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:16,493 INFO L225 Difference]: With dead ends: 127 [2021-10-03 12:40:16,493 INFO L226 Difference]: Without dead ends: 121 [2021-10-03 12:40:16,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:40:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-03 12:40:16,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 73. [2021-10-03 12:40:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.6944444444444446) internal successors, (194), 72 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:16,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 194 transitions. [2021-10-03 12:40:16,509 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 194 transitions. Word has length 20 [2021-10-03 12:40:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:16,509 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 194 transitions. [2021-10-03 12:40:16,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 194 transitions. [2021-10-03 12:40:16,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-03 12:40:16,511 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:16,511 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:16,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-03 12:40:16,512 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:16,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:16,513 INFO L82 PathProgramCache]: Analyzing trace with hash 440180717, now seen corresponding path program 1 times [2021-10-03 12:40:16,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:16,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875138529] [2021-10-03 12:40:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:16,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:40:16,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:16,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875138529] [2021-10-03 12:40:16,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875138529] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:40:16,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:40:16,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:40:16,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049370429] [2021-10-03 12:40:16,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:40:16,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:16,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:40:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:40:16,611 INFO L87 Difference]: Start difference. First operand 73 states and 194 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:16,654 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2021-10-03 12:40:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:40:16,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-03 12:40:16,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:16,659 INFO L225 Difference]: With dead ends: 103 [2021-10-03 12:40:16,659 INFO L226 Difference]: Without dead ends: 74 [2021-10-03 12:40:16,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:40:16,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-03 12:40:16,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-03 12:40:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.671232876712329) internal successors, (195), 73 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 195 transitions. [2021-10-03 12:40:16,683 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 195 transitions. Word has length 20 [2021-10-03 12:40:16,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:16,684 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 195 transitions. [2021-10-03 12:40:16,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:16,685 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 195 transitions. [2021-10-03 12:40:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:40:16,687 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:16,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:16,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-03 12:40:16,688 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:16,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1940497892, now seen corresponding path program 1 times [2021-10-03 12:40:16,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:16,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782769098] [2021-10-03 12:40:16,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:16,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:40:16,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:16,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782769098] [2021-10-03 12:40:16,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782769098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:16,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182397567] [2021-10-03 12:40:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:16,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:16,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:16,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:16,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-03 12:40:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:16,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-03 12:40:16,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:40:17,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182397567] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:17,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:17,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2021-10-03 12:40:17,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981809001] [2021-10-03 12:40:17,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:40:17,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:17,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:40:17,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:40:17,205 INFO L87 Difference]: Start difference. First operand 74 states and 195 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:17,227 INFO L93 Difference]: Finished difference Result 103 states and 272 transitions. [2021-10-03 12:40:17,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:40:17,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-03 12:40:17,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:17,236 INFO L225 Difference]: With dead ends: 103 [2021-10-03 12:40:17,237 INFO L226 Difference]: Without dead ends: 92 [2021-10-03 12:40:17,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:40:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-03 12:40:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-03 12:40:17,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.6923076923076925) internal successors, (245), 91 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 245 transitions. [2021-10-03 12:40:17,257 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 245 transitions. Word has length 21 [2021-10-03 12:40:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:17,258 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 245 transitions. [2021-10-03 12:40:17,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 245 transitions. [2021-10-03 12:40:17,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-03 12:40:17,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:17,264 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:17,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:17,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:17,465 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:17,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:17,466 INFO L82 PathProgramCache]: Analyzing trace with hash -474049979, now seen corresponding path program 2 times [2021-10-03 12:40:17,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:17,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567979563] [2021-10-03 12:40:17,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:17,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:40:17,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:17,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567979563] [2021-10-03 12:40:17,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567979563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:17,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368482174] [2021-10-03 12:40:17,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:40:17,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:17,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:17,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:17,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-03 12:40:17,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:40:17,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:40:17,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-03 12:40:17,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:40:18,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368482174] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:18,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:18,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 8 [2021-10-03 12:40:18,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298942765] [2021-10-03 12:40:18,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-03 12:40:18,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:18,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-03 12:40:18,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-03 12:40:18,257 INFO L87 Difference]: Start difference. First operand 92 states and 245 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:18,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:18,430 INFO L93 Difference]: Finished difference Result 215 states and 499 transitions. [2021-10-03 12:40:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-03 12:40:18,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-03 12:40:18,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:18,432 INFO L225 Difference]: With dead ends: 215 [2021-10-03 12:40:18,432 INFO L226 Difference]: Without dead ends: 147 [2021-10-03 12:40:18,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-10-03 12:40:18,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-03 12:40:18,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 89. [2021-10-03 12:40:18,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.6136363636363638) internal successors, (230), 88 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 230 transitions. [2021-10-03 12:40:18,440 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 230 transitions. Word has length 22 [2021-10-03 12:40:18,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:18,440 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 230 transitions. [2021-10-03 12:40:18,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 230 transitions. [2021-10-03 12:40:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-03 12:40:18,442 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:18,442 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:18,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:18,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-03 12:40:18,658 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:18,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:18,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2031442503, now seen corresponding path program 1 times [2021-10-03 12:40:18,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:18,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854970020] [2021-10-03 12:40:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:18,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:40:19,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:19,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854970020] [2021-10-03 12:40:19,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854970020] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:19,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556271673] [2021-10-03 12:40:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:19,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:19,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:19,095 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:19,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-03 12:40:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:19,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-03 12:40:19,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:19,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2021-10-03 12:40:19,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:40:19,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-03 12:40:19,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-03 12:40:19,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-03 12:40:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:40:19,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556271673] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:19,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:19,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-10-03 12:40:19,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140869095] [2021-10-03 12:40:19,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:40:19,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:19,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:40:19,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:40:19,915 INFO L87 Difference]: Start difference. First operand 89 states and 230 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:20,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:20,163 INFO L93 Difference]: Finished difference Result 171 states and 439 transitions. [2021-10-03 12:40:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 12:40:20,164 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-03 12:40:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:20,167 INFO L225 Difference]: With dead ends: 171 [2021-10-03 12:40:20,167 INFO L226 Difference]: Without dead ends: 158 [2021-10-03 12:40:20,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 374.8ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:40:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-03 12:40:20,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2021-10-03 12:40:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.588235294117647) internal successors, (396), 153 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 396 transitions. [2021-10-03 12:40:20,187 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 396 transitions. Word has length 22 [2021-10-03 12:40:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:20,188 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 396 transitions. [2021-10-03 12:40:20,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:20,188 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 396 transitions. [2021-10-03 12:40:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-03 12:40:20,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:20,195 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:20,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:20,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:20,397 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:20,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:20,398 INFO L82 PathProgramCache]: Analyzing trace with hash 959318512, now seen corresponding path program 2 times [2021-10-03 12:40:20,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:20,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997985196] [2021-10-03 12:40:20,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:20,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:40:21,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:21,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997985196] [2021-10-03 12:40:21,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997985196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:21,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126568258] [2021-10-03 12:40:21,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:40:21,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:21,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:21,128 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:21,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-03 12:40:21,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:40:21,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:40:21,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:40:21,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:40:21,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126568258] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:21,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:21,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2021-10-03 12:40:21,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274744777] [2021-10-03 12:40:21,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:40:21,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:21,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:40:21,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:40:21,622 INFO L87 Difference]: Start difference. First operand 154 states and 396 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:22,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:22,242 INFO L93 Difference]: Finished difference Result 387 states and 847 transitions. [2021-10-03 12:40:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-03 12:40:22,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-03 12:40:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:22,247 INFO L225 Difference]: With dead ends: 387 [2021-10-03 12:40:22,247 INFO L226 Difference]: Without dead ends: 374 [2021-10-03 12:40:22,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 515.7ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:40:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-10-03 12:40:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 119. [2021-10-03 12:40:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.7796610169491527) internal successors, (328), 118 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 328 transitions. [2021-10-03 12:40:22,258 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 328 transitions. Word has length 23 [2021-10-03 12:40:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:22,259 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 328 transitions. [2021-10-03 12:40:22,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:22,259 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 328 transitions. [2021-10-03 12:40:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-03 12:40:22,260 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:22,261 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:22,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:22,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:22,475 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:22,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:22,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1105830338, now seen corresponding path program 3 times [2021-10-03 12:40:22,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:22,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186211461] [2021-10-03 12:40:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:22,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:40:22,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:22,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186211461] [2021-10-03 12:40:22,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186211461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:22,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327561895] [2021-10-03 12:40:22,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:40:22,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:22,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:22,575 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:22,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-03 12:40:22,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:40:22,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:40:22,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-03 12:40:22,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:40:23,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327561895] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:23,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:23,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-03 12:40:23,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723111296] [2021-10-03 12:40:23,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-03 12:40:23,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:23,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-03 12:40:23,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-03 12:40:23,013 INFO L87 Difference]: Start difference. First operand 119 states and 328 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:23,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:23,134 INFO L93 Difference]: Finished difference Result 259 states and 688 transitions. [2021-10-03 12:40:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:40:23,135 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-03 12:40:23,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:23,138 INFO L225 Difference]: With dead ends: 259 [2021-10-03 12:40:23,138 INFO L226 Difference]: Without dead ends: 247 [2021-10-03 12:40:23,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-03 12:40:23,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-10-03 12:40:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 167. [2021-10-03 12:40:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.680722891566265) internal successors, (445), 166 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 445 transitions. [2021-10-03 12:40:23,148 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 445 transitions. Word has length 23 [2021-10-03 12:40:23,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:23,148 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 445 transitions. [2021-10-03 12:40:23,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:23,148 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 445 transitions. [2021-10-03 12:40:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-03 12:40:23,150 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:23,150 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:23,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:23,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:23,357 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:23,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:23,358 INFO L82 PathProgramCache]: Analyzing trace with hash -472443534, now seen corresponding path program 1 times [2021-10-03 12:40:23,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:23,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847189693] [2021-10-03 12:40:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:23,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:40:23,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:23,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847189693] [2021-10-03 12:40:23,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847189693] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:40:23,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:40:23,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-03 12:40:23,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479759320] [2021-10-03 12:40:23,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 12:40:23,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:23,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 12:40:23,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:40:23,480 INFO L87 Difference]: Start difference. First operand 167 states and 445 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:23,497 INFO L93 Difference]: Finished difference Result 193 states and 481 transitions. [2021-10-03 12:40:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:40:23,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-03 12:40:23,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:23,500 INFO L225 Difference]: With dead ends: 193 [2021-10-03 12:40:23,500 INFO L226 Difference]: Without dead ends: 170 [2021-10-03 12:40:23,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:40:23,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-03 12:40:23,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 152. [2021-10-03 12:40:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.622516556291391) internal successors, (396), 151 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 396 transitions. [2021-10-03 12:40:23,507 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 396 transitions. Word has length 23 [2021-10-03 12:40:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:23,509 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 396 transitions. [2021-10-03 12:40:23,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 396 transitions. [2021-10-03 12:40:23,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-03 12:40:23,511 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:23,511 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:23,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-03 12:40:23,512 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:23,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:23,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2115479223, now seen corresponding path program 1 times [2021-10-03 12:40:23,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:23,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973333024] [2021-10-03 12:40:23,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:23,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:40:23,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:23,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973333024] [2021-10-03 12:40:23,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973333024] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:23,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432946952] [2021-10-03 12:40:23,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:23,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:23,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:23,942 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:23,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-03 12:40:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:24,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-03 12:40:24,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:40:24,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432946952] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:24,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:24,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2021-10-03 12:40:24,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682843035] [2021-10-03 12:40:24,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 12:40:24,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:24,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 12:40:24,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-03 12:40:24,474 INFO L87 Difference]: Start difference. First operand 152 states and 396 transitions. Second operand has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:24,760 INFO L93 Difference]: Finished difference Result 277 states and 707 transitions. [2021-10-03 12:40:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-03 12:40:24,760 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-03 12:40:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:24,763 INFO L225 Difference]: With dead ends: 277 [2021-10-03 12:40:24,763 INFO L226 Difference]: Without dead ends: 264 [2021-10-03 12:40:24,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:40:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-10-03 12:40:24,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 176. [2021-10-03 12:40:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.76) internal successors, (483), 175 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 483 transitions. [2021-10-03 12:40:24,772 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 483 transitions. Word has length 24 [2021-10-03 12:40:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:24,772 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 483 transitions. [2021-10-03 12:40:24,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 483 transitions. [2021-10-03 12:40:24,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-03 12:40:24,774 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:24,774 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:24,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:24,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-03 12:40:24,988 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:24,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:24,989 INFO L82 PathProgramCache]: Analyzing trace with hash 453674801, now seen corresponding path program 1 times [2021-10-03 12:40:24,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:24,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202623580] [2021-10-03 12:40:24,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:24,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:40:25,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:25,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202623580] [2021-10-03 12:40:25,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202623580] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:25,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002103019] [2021-10-03 12:40:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:25,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:25,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:25,108 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:25,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-03 12:40:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:25,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-03 12:40:25,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:40:25,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002103019] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:25,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:25,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-03 12:40:25,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355026390] [2021-10-03 12:40:25,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-03 12:40:25,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:25,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-03 12:40:25,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-03 12:40:25,701 INFO L87 Difference]: Start difference. First operand 176 states and 483 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:25,785 INFO L93 Difference]: Finished difference Result 162 states and 412 transitions. [2021-10-03 12:40:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 12:40:25,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-03 12:40:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:25,787 INFO L225 Difference]: With dead ends: 162 [2021-10-03 12:40:25,787 INFO L226 Difference]: Without dead ends: 133 [2021-10-03 12:40:25,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-03 12:40:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-03 12:40:25,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-10-03 12:40:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.742424242424242) internal successors, (362), 132 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 362 transitions. [2021-10-03 12:40:25,794 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 362 transitions. Word has length 24 [2021-10-03 12:40:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:25,794 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 362 transitions. [2021-10-03 12:40:25,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 362 transitions. [2021-10-03 12:40:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-03 12:40:25,795 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:25,796 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:25,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:26,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:26,009 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:26,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:26,010 INFO L82 PathProgramCache]: Analyzing trace with hash 583998638, now seen corresponding path program 2 times [2021-10-03 12:40:26,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:26,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214359743] [2021-10-03 12:40:26,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:26,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:40:26,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:26,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214359743] [2021-10-03 12:40:26,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214359743] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:26,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129299480] [2021-10-03 12:40:26,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:40:26,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:26,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:26,162 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:26,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-03 12:40:26,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:40:26,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:40:26,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-03 12:40:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:40:26,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129299480] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:26,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:26,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-10-03 12:40:26,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535047167] [2021-10-03 12:40:26,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-03 12:40:26,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:26,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-03 12:40:26,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-03 12:40:26,889 INFO L87 Difference]: Start difference. First operand 133 states and 362 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:26,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:26,982 INFO L93 Difference]: Finished difference Result 129 states and 332 transitions. [2021-10-03 12:40:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 12:40:26,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-03 12:40:26,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:26,984 INFO L225 Difference]: With dead ends: 129 [2021-10-03 12:40:26,984 INFO L226 Difference]: Without dead ends: 113 [2021-10-03 12:40:26,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-03 12:40:26,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-03 12:40:26,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-10-03 12:40:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.544642857142857) internal successors, (285), 112 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 285 transitions. [2021-10-03 12:40:26,989 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 285 transitions. Word has length 25 [2021-10-03 12:40:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:26,989 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 285 transitions. [2021-10-03 12:40:26,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:26,989 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 285 transitions. [2021-10-03 12:40:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-03 12:40:26,991 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:26,991 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:27,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:27,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-03 12:40:27,207 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash 40429422, now seen corresponding path program 1 times [2021-10-03 12:40:27,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:27,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529098610] [2021-10-03 12:40:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:27,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:40:27,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:27,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529098610] [2021-10-03 12:40:27,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529098610] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:27,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429544607] [2021-10-03 12:40:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:27,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:27,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:27,971 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:27,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-03 12:40:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:28,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-03 12:40:28,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:28,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:40:28,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:40:28,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:40:28,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:40:29,105 INFO L354 Elim1Store]: treesize reduction 39, result has 38.1 percent of original size [2021-10-03 12:40:29,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 123 treesize of output 74 [2021-10-03 12:40:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:40:29,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429544607] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:29,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:29,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 19 [2021-10-03 12:40:29,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420531011] [2021-10-03 12:40:29,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 12:40:29,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:29,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 12:40:29,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:40:29,158 INFO L87 Difference]: Start difference. First operand 113 states and 285 transitions. Second operand has 21 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:30,690 INFO L93 Difference]: Finished difference Result 249 states and 620 transitions. [2021-10-03 12:40:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-03 12:40:30,691 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-03 12:40:30,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:30,693 INFO L225 Difference]: With dead ends: 249 [2021-10-03 12:40:30,693 INFO L226 Difference]: Without dead ends: 236 [2021-10-03 12:40:30,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1642.1ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 12:40:30,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-03 12:40:30,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2021-10-03 12:40:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.6411764705882352) internal successors, (449), 170 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 449 transitions. [2021-10-03 12:40:30,701 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 449 transitions. Word has length 25 [2021-10-03 12:40:30,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:30,702 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 449 transitions. [2021-10-03 12:40:30,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:30,702 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 449 transitions. [2021-10-03 12:40:30,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-03 12:40:30,703 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:30,703 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:30,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:30,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:30,919 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:30,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1573255049, now seen corresponding path program 2 times [2021-10-03 12:40:30,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:30,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205613026] [2021-10-03 12:40:30,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:30,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:40:31,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:31,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205613026] [2021-10-03 12:40:31,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205613026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:31,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013246036] [2021-10-03 12:40:31,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:40:31,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:31,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:31,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:31,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-03 12:40:31,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:40:31,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:40:31,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-03 12:40:31,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:40:31,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013246036] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:31,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:31,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-03 12:40:31,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171945795] [2021-10-03 12:40:31,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-03 12:40:31,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:31,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-03 12:40:31,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-03 12:40:31,742 INFO L87 Difference]: Start difference. First operand 171 states and 449 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:31,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:31,857 INFO L93 Difference]: Finished difference Result 418 states and 1076 transitions. [2021-10-03 12:40:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-03 12:40:31,857 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-03 12:40:31,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:31,861 INFO L225 Difference]: With dead ends: 418 [2021-10-03 12:40:31,861 INFO L226 Difference]: Without dead ends: 402 [2021-10-03 12:40:31,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-03 12:40:31,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-10-03 12:40:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 300. [2021-10-03 12:40:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.6923076923076925) internal successors, (805), 299 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 805 transitions. [2021-10-03 12:40:31,874 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 805 transitions. Word has length 26 [2021-10-03 12:40:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:31,875 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 805 transitions. [2021-10-03 12:40:31,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 805 transitions. [2021-10-03 12:40:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-03 12:40:31,876 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:31,876 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:31,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:32,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-03 12:40:32,089 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:32,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:32,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1937952245, now seen corresponding path program 3 times [2021-10-03 12:40:32,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:32,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269251967] [2021-10-03 12:40:32,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:32,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:40:32,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:32,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269251967] [2021-10-03 12:40:32,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269251967] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:32,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462751109] [2021-10-03 12:40:32,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:40:32,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:32,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:32,359 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:32,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-03 12:40:32,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-03 12:40:32,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:40:32,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-03 12:40:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:40:33,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462751109] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:33,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:33,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-10-03 12:40:33,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442586896] [2021-10-03 12:40:33,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:40:33,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:33,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:40:33,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:40:33,519 INFO L87 Difference]: Start difference. First operand 300 states and 805 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:34,037 INFO L93 Difference]: Finished difference Result 420 states and 1063 transitions. [2021-10-03 12:40:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:40:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-03 12:40:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:34,041 INFO L225 Difference]: With dead ends: 420 [2021-10-03 12:40:34,041 INFO L226 Difference]: Without dead ends: 381 [2021-10-03 12:40:34,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 570.9ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-03 12:40:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-10-03 12:40:34,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 287. [2021-10-03 12:40:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.7167832167832167) internal successors, (777), 286 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:34,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 777 transitions. [2021-10-03 12:40:34,055 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 777 transitions. Word has length 26 [2021-10-03 12:40:34,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:34,055 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 777 transitions. [2021-10-03 12:40:34,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 777 transitions. [2021-10-03 12:40:34,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-03 12:40:34,057 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:34,057 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:34,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:34,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:34,272 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:34,272 INFO L82 PathProgramCache]: Analyzing trace with hash 430459833, now seen corresponding path program 4 times [2021-10-03 12:40:34,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:34,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929053917] [2021-10-03 12:40:34,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:34,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:40:35,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:35,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929053917] [2021-10-03 12:40:35,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929053917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:35,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670306683] [2021-10-03 12:40:35,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:40:35,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:35,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:35,529 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:35,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-03 12:40:35,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:40:35,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:40:35,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-03 12:40:35,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:40:36,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670306683] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:36,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:36,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2021-10-03 12:40:36,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130477622] [2021-10-03 12:40:36,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:40:36,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:36,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:40:36,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:40:36,421 INFO L87 Difference]: Start difference. First operand 287 states and 777 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:37,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:37,433 INFO L93 Difference]: Finished difference Result 374 states and 987 transitions. [2021-10-03 12:40:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:40:37,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-03 12:40:37,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:37,436 INFO L225 Difference]: With dead ends: 374 [2021-10-03 12:40:37,436 INFO L226 Difference]: Without dead ends: 287 [2021-10-03 12:40:37,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1161.4ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-10-03 12:40:37,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-03 12:40:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 183. [2021-10-03 12:40:37,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.7967032967032965) internal successors, (509), 182 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:37,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 509 transitions. [2021-10-03 12:40:37,444 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 509 transitions. Word has length 26 [2021-10-03 12:40:37,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:37,445 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 509 transitions. [2021-10-03 12:40:37,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 509 transitions. [2021-10-03 12:40:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-03 12:40:37,446 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:37,446 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:37,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:37,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-03 12:40:37,660 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:37,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:37,661 INFO L82 PathProgramCache]: Analyzing trace with hash 345857121, now seen corresponding path program 1 times [2021-10-03 12:40:37,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:37,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871957585] [2021-10-03 12:40:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:37,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:40:37,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:37,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871957585] [2021-10-03 12:40:37,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871957585] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:37,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977766073] [2021-10-03 12:40:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:37,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:37,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:37,835 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:37,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-03 12:40:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:38,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-03 12:40:38,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:40:38,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977766073] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:38,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:38,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-10-03 12:40:38,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661791096] [2021-10-03 12:40:38,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 12:40:38,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:38,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 12:40:38,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-03 12:40:38,495 INFO L87 Difference]: Start difference. First operand 183 states and 509 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:38,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:38,631 INFO L93 Difference]: Finished difference Result 313 states and 788 transitions. [2021-10-03 12:40:38,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-03 12:40:38,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-03 12:40:38,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:38,634 INFO L225 Difference]: With dead ends: 313 [2021-10-03 12:40:38,634 INFO L226 Difference]: Without dead ends: 264 [2021-10-03 12:40:38,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:40:38,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-10-03 12:40:38,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 185. [2021-10-03 12:40:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.782608695652174) internal successors, (512), 184 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:38,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 512 transitions. [2021-10-03 12:40:38,646 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 512 transitions. Word has length 26 [2021-10-03 12:40:38,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:38,647 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 512 transitions. [2021-10-03 12:40:38,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:38,647 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 512 transitions. [2021-10-03 12:40:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-03 12:40:38,648 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:38,648 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:38,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:38,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-03 12:40:38,862 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:38,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:38,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1161926592, now seen corresponding path program 5 times [2021-10-03 12:40:38,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:38,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60252186] [2021-10-03 12:40:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:38,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:40:39,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:39,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60252186] [2021-10-03 12:40:39,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60252186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:39,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133905811] [2021-10-03 12:40:39,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:40:39,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:39,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:39,404 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:39,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-03 12:40:39,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-03 12:40:39,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:40:39,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-03 12:40:39,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:40:40,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133905811] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:40,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:40,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2021-10-03 12:40:40,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901622569] [2021-10-03 12:40:40,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:40:40,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:40,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:40:40,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:40:40,480 INFO L87 Difference]: Start difference. First operand 185 states and 512 transitions. Second operand has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:41,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:41,317 INFO L93 Difference]: Finished difference Result 431 states and 1215 transitions. [2021-10-03 12:40:41,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-03 12:40:41,318 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-03 12:40:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:41,321 INFO L225 Difference]: With dead ends: 431 [2021-10-03 12:40:41,321 INFO L226 Difference]: Without dead ends: 407 [2021-10-03 12:40:41,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 812.5ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-10-03 12:40:41,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-10-03 12:40:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 273. [2021-10-03 12:40:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.073529411764706) internal successors, (836), 272 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 836 transitions. [2021-10-03 12:40:41,335 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 836 transitions. Word has length 27 [2021-10-03 12:40:41,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:41,335 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 836 transitions. [2021-10-03 12:40:41,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 836 transitions. [2021-10-03 12:40:41,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-03 12:40:41,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:41,337 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:41,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-03 12:40:41,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:41,543 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:41,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:41,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1160377676, now seen corresponding path program 2 times [2021-10-03 12:40:41,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:41,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997346421] [2021-10-03 12:40:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:41,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-03 12:40:41,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:41,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997346421] [2021-10-03 12:40:41,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997346421] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:41,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349571670] [2021-10-03 12:40:41,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:40:41,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:41,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:41,754 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:41,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-03 12:40:42,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:40:42,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:40:42,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-03 12:40:42,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:40:42,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349571670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:42,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:42,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-10-03 12:40:42,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376006297] [2021-10-03 12:40:42,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-03 12:40:42,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:42,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-03 12:40:42,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-03 12:40:42,770 INFO L87 Difference]: Start difference. First operand 273 states and 836 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:42,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:42,914 INFO L93 Difference]: Finished difference Result 317 states and 809 transitions. [2021-10-03 12:40:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:40:42,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-03 12:40:42,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:42,917 INFO L225 Difference]: With dead ends: 317 [2021-10-03 12:40:42,917 INFO L226 Difference]: Without dead ends: 247 [2021-10-03 12:40:42,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-03 12:40:42,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-10-03 12:40:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 137. [2021-10-03 12:40:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.6838235294117645) internal successors, (365), 136 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 365 transitions. [2021-10-03 12:40:42,925 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 365 transitions. Word has length 27 [2021-10-03 12:40:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:42,925 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 365 transitions. [2021-10-03 12:40:42,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:42,927 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 365 transitions. [2021-10-03 12:40:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-03 12:40:42,928 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:42,928 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:42,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:43,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:43,143 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:43,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:43,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1340043017, now seen corresponding path program 6 times [2021-10-03 12:40:43,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:43,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184084521] [2021-10-03 12:40:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:43,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:40:43,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:43,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184084521] [2021-10-03 12:40:43,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184084521] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:43,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508636064] [2021-10-03 12:40:43,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:40:43,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:43,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:43,400 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:43,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-03 12:40:43,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-03 12:40:43,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:40:43,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-03 12:40:43,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:40:44,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508636064] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:44,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:44,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-10-03 12:40:44,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398794346] [2021-10-03 12:40:44,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:40:44,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:40:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:40:44,347 INFO L87 Difference]: Start difference. First operand 137 states and 365 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:44,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:44,939 INFO L93 Difference]: Finished difference Result 467 states and 1233 transitions. [2021-10-03 12:40:44,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:40:44,940 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-03 12:40:44,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:44,943 INFO L225 Difference]: With dead ends: 467 [2021-10-03 12:40:44,943 INFO L226 Difference]: Without dead ends: 419 [2021-10-03 12:40:44,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 478.0ms TimeCoverageRelationStatistics Valid=224, Invalid=768, Unknown=0, NotChecked=0, Total=992 [2021-10-03 12:40:44,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-10-03 12:40:44,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 217. [2021-10-03 12:40:44,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.8333333333333335) internal successors, (612), 216 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 612 transitions. [2021-10-03 12:40:44,956 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 612 transitions. Word has length 28 [2021-10-03 12:40:44,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:44,957 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 612 transitions. [2021-10-03 12:40:44,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:44,958 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 612 transitions. [2021-10-03 12:40:44,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-03 12:40:44,959 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:44,959 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:44,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-10-03 12:40:45,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-03 12:40:45,173 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:45,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:45,174 INFO L82 PathProgramCache]: Analyzing trace with hash -975345821, now seen corresponding path program 7 times [2021-10-03 12:40:45,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:45,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440827944] [2021-10-03 12:40:45,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:45,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:40:46,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:46,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440827944] [2021-10-03 12:40:46,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440827944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:46,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500340672] [2021-10-03 12:40:46,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:40:46,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:46,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:46,630 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:46,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-03 12:40:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:47,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-03 12:40:47,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:40:48,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500340672] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:48,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:48,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 24 [2021-10-03 12:40:48,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108708490] [2021-10-03 12:40:48,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-03 12:40:48,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:48,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-03 12:40:48,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-10-03 12:40:48,344 INFO L87 Difference]: Start difference. First operand 217 states and 612 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:50,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:50,664 INFO L93 Difference]: Finished difference Result 345 states and 851 transitions. [2021-10-03 12:40:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-03 12:40:50,665 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-03 12:40:50,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:50,668 INFO L225 Difference]: With dead ends: 345 [2021-10-03 12:40:50,668 INFO L226 Difference]: Without dead ends: 324 [2021-10-03 12:40:50,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 2645.2ms TimeCoverageRelationStatistics Valid=290, Invalid=2062, Unknown=0, NotChecked=0, Total=2352 [2021-10-03 12:40:50,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-10-03 12:40:50,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 229. [2021-10-03 12:40:50,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.807017543859649) internal successors, (640), 228 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:50,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 640 transitions. [2021-10-03 12:40:50,679 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 640 transitions. Word has length 28 [2021-10-03 12:40:50,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:50,680 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 640 transitions. [2021-10-03 12:40:50,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:50,680 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 640 transitions. [2021-10-03 12:40:50,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-03 12:40:50,681 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:50,682 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:50,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:50,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:50,897 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:50,898 INFO L82 PathProgramCache]: Analyzing trace with hash 513690784, now seen corresponding path program 8 times [2021-10-03 12:40:50,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:50,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76173759] [2021-10-03 12:40:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:50,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-03 12:40:51,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:51,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76173759] [2021-10-03 12:40:51,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76173759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:51,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898690198] [2021-10-03 12:40:51,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:40:51,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:51,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:51,035 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:51,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-03 12:40:51,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:40:51,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:40:51,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-03 12:40:51,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-03 12:40:52,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898690198] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:52,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:52,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-03 12:40:52,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343192814] [2021-10-03 12:40:52,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-03 12:40:52,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:52,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-03 12:40:52,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-03 12:40:52,170 INFO L87 Difference]: Start difference. First operand 229 states and 640 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:52,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:52,336 INFO L93 Difference]: Finished difference Result 362 states and 913 transitions. [2021-10-03 12:40:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-03 12:40:52,336 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-03 12:40:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:52,339 INFO L225 Difference]: With dead ends: 362 [2021-10-03 12:40:52,339 INFO L226 Difference]: Without dead ends: 323 [2021-10-03 12:40:52,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:40:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-03 12:40:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 271. [2021-10-03 12:40:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.696296296296296) internal successors, (728), 270 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:52,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 728 transitions. [2021-10-03 12:40:52,350 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 728 transitions. Word has length 29 [2021-10-03 12:40:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:52,350 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 728 transitions. [2021-10-03 12:40:52,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:52,351 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 728 transitions. [2021-10-03 12:40:52,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-03 12:40:52,352 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:52,352 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:52,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:52,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:52,566 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:52,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:52,566 INFO L82 PathProgramCache]: Analyzing trace with hash -916562500, now seen corresponding path program 9 times [2021-10-03 12:40:52,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:52,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138826875] [2021-10-03 12:40:52,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:52,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:40:53,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:53,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138826875] [2021-10-03 12:40:53,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138826875] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:53,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12639043] [2021-10-03 12:40:53,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:40:53,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:53,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:53,234 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:53,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-03 12:40:53,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-03 12:40:53,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:40:53,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-03 12:40:53,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:40:54,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12639043] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:54,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:54,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 17 [2021-10-03 12:40:54,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099864092] [2021-10-03 12:40:54,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:40:54,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:54,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:40:54,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:40:54,898 INFO L87 Difference]: Start difference. First operand 271 states and 728 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:55,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:55,793 INFO L93 Difference]: Finished difference Result 460 states and 1135 transitions. [2021-10-03 12:40:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-03 12:40:55,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-03 12:40:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:55,797 INFO L225 Difference]: With dead ends: 460 [2021-10-03 12:40:55,797 INFO L226 Difference]: Without dead ends: 435 [2021-10-03 12:40:55,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1105.4ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-10-03 12:40:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-10-03 12:40:55,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 283. [2021-10-03 12:40:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.7375886524822697) internal successors, (772), 282 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 772 transitions. [2021-10-03 12:40:55,810 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 772 transitions. Word has length 29 [2021-10-03 12:40:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:55,810 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 772 transitions. [2021-10-03 12:40:55,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:55,811 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 772 transitions. [2021-10-03 12:40:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-03 12:40:55,812 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:55,812 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:55,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-03 12:40:56,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-03 12:40:56,026 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:56,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:56,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1971276539, now seen corresponding path program 10 times [2021-10-03 12:40:56,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:56,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711048177] [2021-10-03 12:40:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:56,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:40:56,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:56,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711048177] [2021-10-03 12:40:56,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711048177] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:56,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639480342] [2021-10-03 12:40:56,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:40:56,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:56,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:56,235 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:56,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-03 12:40:56,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:40:56,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:40:56,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-03 12:40:56,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:40:57,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639480342] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:57,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:40:57,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-03 12:40:57,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152540385] [2021-10-03 12:40:57,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:40:57,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:40:57,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:40:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:40:57,782 INFO L87 Difference]: Start difference. First operand 283 states and 772 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:40:57,978 INFO L93 Difference]: Finished difference Result 333 states and 888 transitions. [2021-10-03 12:40:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:40:57,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-03 12:40:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:40:57,980 INFO L225 Difference]: With dead ends: 333 [2021-10-03 12:40:57,980 INFO L226 Difference]: Without dead ends: 291 [2021-10-03 12:40:57,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 344.5ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:40:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-10-03 12:40:57,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 235. [2021-10-03 12:40:57,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.8290598290598292) internal successors, (662), 234 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 662 transitions. [2021-10-03 12:40:57,990 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 662 transitions. Word has length 30 [2021-10-03 12:40:57,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:40:57,991 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 662 transitions. [2021-10-03 12:40:57,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:40:57,991 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 662 transitions. [2021-10-03 12:40:57,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-03 12:40:57,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:40:57,993 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:40:58,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-03 12:40:58,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-03 12:40:58,207 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:40:58,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:40:58,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1896740797, now seen corresponding path program 1 times [2021-10-03 12:40:58,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:40:58,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911789970] [2021-10-03 12:40:58,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:58,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:40:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:40:59,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:40:59,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911789970] [2021-10-03 12:40:59,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911789970] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:40:59,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641080009] [2021-10-03 12:40:59,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:40:59,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:40:59,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:40:59,118 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:40:59,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-03 12:40:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:40:59,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-03 12:40:59,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:40:59,861 INFO L354 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2021-10-03 12:40:59,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 81 treesize of output 97 [2021-10-03 12:41:00,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:41:00,370 INFO L354 Elim1Store]: treesize reduction 146, result has 24.0 percent of original size [2021-10-03 12:41:00,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 50 treesize of output 82 [2021-10-03 12:41:00,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-10-03 12:41:00,902 INFO L354 Elim1Store]: treesize reduction 84, result has 42.1 percent of original size [2021-10-03 12:41:00,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 68 treesize of output 114 [2021-10-03 12:41:01,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-10-03 12:41:01,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-03 12:41:01,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-03 12:41:01,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-03 12:41:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:41:02,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641080009] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:02,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:41:02,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 30 [2021-10-03 12:41:02,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016116448] [2021-10-03 12:41:02,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-03 12:41:02,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:41:02,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-03 12:41:02,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-10-03 12:41:02,643 INFO L87 Difference]: Start difference. First operand 235 states and 662 transitions. Second operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:04,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:41:04,354 INFO L93 Difference]: Finished difference Result 406 states and 1059 transitions. [2021-10-03 12:41:04,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-03 12:41:04,355 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-03 12:41:04,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:41:04,358 INFO L225 Difference]: With dead ends: 406 [2021-10-03 12:41:04,358 INFO L226 Difference]: Without dead ends: 385 [2021-10-03 12:41:04,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2494.0ms TimeCoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2021-10-03 12:41:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-10-03 12:41:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 377. [2021-10-03 12:41:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.622340425531915) internal successors, (986), 376 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 986 transitions. [2021-10-03 12:41:04,372 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 986 transitions. Word has length 30 [2021-10-03 12:41:04,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:41:04,372 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 986 transitions. [2021-10-03 12:41:04,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 986 transitions. [2021-10-03 12:41:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-03 12:41:04,374 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:41:04,374 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:41:04,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-03 12:41:04,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-03 12:41:04,589 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:41:04,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:41:04,589 INFO L82 PathProgramCache]: Analyzing trace with hash -966707980, now seen corresponding path program 2 times [2021-10-03 12:41:04,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:41:04,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536804980] [2021-10-03 12:41:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:41:04,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:41:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:41:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:41:05,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:41:05,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536804980] [2021-10-03 12:41:05,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536804980] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:05,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036162523] [2021-10-03 12:41:05,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:41:05,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:05,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:41:05,651 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:41:05,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-03 12:41:06,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:41:06,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:41:06,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-03 12:41:06,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:41:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:41:07,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036162523] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:07,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:41:07,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 27 [2021-10-03 12:41:07,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120893232] [2021-10-03 12:41:07,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:41:07,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:41:07,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:41:07,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:41:07,659 INFO L87 Difference]: Start difference. First operand 377 states and 986 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:09,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:41:09,461 INFO L93 Difference]: Finished difference Result 546 states and 1357 transitions. [2021-10-03 12:41:09,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-03 12:41:09,461 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-03 12:41:09,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:41:09,465 INFO L225 Difference]: With dead ends: 546 [2021-10-03 12:41:09,465 INFO L226 Difference]: Without dead ends: 525 [2021-10-03 12:41:09,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2242.7ms TimeCoverageRelationStatistics Valid=295, Invalid=2155, Unknown=0, NotChecked=0, Total=2450 [2021-10-03 12:41:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-10-03 12:41:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 327. [2021-10-03 12:41:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.6993865030674846) internal successors, (880), 326 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 880 transitions. [2021-10-03 12:41:09,477 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 880 transitions. Word has length 31 [2021-10-03 12:41:09,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:41:09,478 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 880 transitions. [2021-10-03 12:41:09,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:09,478 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 880 transitions. [2021-10-03 12:41:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-03 12:41:09,480 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:41:09,480 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:41:09,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-03 12:41:09,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-03 12:41:09,694 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:41:09,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:41:09,694 INFO L82 PathProgramCache]: Analyzing trace with hash -645937274, now seen corresponding path program 3 times [2021-10-03 12:41:09,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:41:09,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838193149] [2021-10-03 12:41:09,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:41:09,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:41:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:41:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:41:10,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:41:10,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838193149] [2021-10-03 12:41:10,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838193149] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:10,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008830821] [2021-10-03 12:41:10,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:41:10,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:10,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:41:10,069 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:41:10,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-03 12:41:10,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-03 12:41:10,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:41:10,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:41:10,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:41:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:41:12,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008830821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:12,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:41:12,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-10-03 12:41:12,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942046772] [2021-10-03 12:41:12,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-03 12:41:12,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:41:12,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-03 12:41:12,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:41:12,218 INFO L87 Difference]: Start difference. First operand 327 states and 880 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:13,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:41:13,253 INFO L93 Difference]: Finished difference Result 461 states and 1119 transitions. [2021-10-03 12:41:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-03 12:41:13,258 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-03 12:41:13,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:41:13,261 INFO L225 Difference]: With dead ends: 461 [2021-10-03 12:41:13,261 INFO L226 Difference]: Without dead ends: 317 [2021-10-03 12:41:13,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1167.4ms TimeCoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-10-03 12:41:13,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-10-03 12:41:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 269. [2021-10-03 12:41:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.5186567164179103) internal successors, (675), 268 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 675 transitions. [2021-10-03 12:41:13,273 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 675 transitions. Word has length 31 [2021-10-03 12:41:13,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:41:13,274 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 675 transitions. [2021-10-03 12:41:13,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 675 transitions. [2021-10-03 12:41:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-03 12:41:13,275 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:41:13,276 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:41:13,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-03 12:41:13,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-03 12:41:13,490 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:41:13,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:41:13,491 INFO L82 PathProgramCache]: Analyzing trace with hash -606714989, now seen corresponding path program 4 times [2021-10-03 12:41:13,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:41:13,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979969764] [2021-10-03 12:41:13,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:41:13,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:41:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:41:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:41:15,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:41:15,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979969764] [2021-10-03 12:41:15,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979969764] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:15,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247200901] [2021-10-03 12:41:15,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:41:15,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:15,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:41:15,012 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:41:15,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-03 12:41:15,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:41:15,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:41:15,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-03 12:41:15,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:41:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-03 12:41:17,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247200901] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:17,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:41:17,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 26 [2021-10-03 12:41:17,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792323694] [2021-10-03 12:41:17,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:41:17,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:41:17,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:41:17,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:41:17,221 INFO L87 Difference]: Start difference. First operand 269 states and 675 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:41:20,035 INFO L93 Difference]: Finished difference Result 441 states and 1011 transitions. [2021-10-03 12:41:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-03 12:41:20,036 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-03 12:41:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:41:20,038 INFO L225 Difference]: With dead ends: 441 [2021-10-03 12:41:20,038 INFO L226 Difference]: Without dead ends: 420 [2021-10-03 12:41:20,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2796.7ms TimeCoverageRelationStatistics Valid=235, Invalid=2215, Unknown=0, NotChecked=0, Total=2450 [2021-10-03 12:41:20,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-10-03 12:41:20,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 275. [2021-10-03 12:41:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.5364963503649633) internal successors, (695), 274 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 695 transitions. [2021-10-03 12:41:20,049 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 695 transitions. Word has length 32 [2021-10-03 12:41:20,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:41:20,049 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 695 transitions. [2021-10-03 12:41:20,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 695 transitions. [2021-10-03 12:41:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-03 12:41:20,051 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:41:20,051 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:41:20,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-03 12:41:20,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-03 12:41:20,265 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:41:20,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:41:20,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1713257765, now seen corresponding path program 5 times [2021-10-03 12:41:20,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:41:20,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323287946] [2021-10-03 12:41:20,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:41:20,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:41:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:41:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:41:21,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:41:21,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323287946] [2021-10-03 12:41:21,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323287946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:21,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952066251] [2021-10-03 12:41:21,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:41:21,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:21,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:41:21,008 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:41:21,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-03 12:41:22,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-03 12:41:22,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:41:22,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-03 12:41:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:41:24,140 INFO L354 Elim1Store]: treesize reduction 39, result has 38.1 percent of original size [2021-10-03 12:41:24,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 76 [2021-10-03 12:41:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:41:24,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952066251] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:24,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:41:24,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 27 [2021-10-03 12:41:24,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341713314] [2021-10-03 12:41:24,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:41:24,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:41:24,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:41:24,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:41:24,193 INFO L87 Difference]: Start difference. First operand 275 states and 695 transitions. Second operand has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:25,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:41:25,705 INFO L93 Difference]: Finished difference Result 382 states and 924 transitions. [2021-10-03 12:41:25,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 12:41:25,706 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-03 12:41:25,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:41:25,709 INFO L225 Difference]: With dead ends: 382 [2021-10-03 12:41:25,709 INFO L226 Difference]: Without dead ends: 367 [2021-10-03 12:41:25,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 2063.7ms TimeCoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2021-10-03 12:41:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-10-03 12:41:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 349. [2021-10-03 12:41:25,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.410919540229885) internal successors, (839), 348 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:25,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 839 transitions. [2021-10-03 12:41:25,721 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 839 transitions. Word has length 32 [2021-10-03 12:41:25,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:41:25,721 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 839 transitions. [2021-10-03 12:41:25,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:25,722 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 839 transitions. [2021-10-03 12:41:25,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:41:25,723 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:41:25,723 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:41:25,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-03 12:41:25,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:25,935 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:41:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:41:25,936 INFO L82 PathProgramCache]: Analyzing trace with hash -943655312, now seen corresponding path program 6 times [2021-10-03 12:41:25,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:41:25,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138757683] [2021-10-03 12:41:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:41:25,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:41:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:41:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-03 12:41:26,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:41:26,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138757683] [2021-10-03 12:41:26,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138757683] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:26,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629086663] [2021-10-03 12:41:26,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:41:26,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:26,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:41:26,231 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:41:26,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-03 12:41:27,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-03 12:41:27,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:41:27,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-03 12:41:27,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:41:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-03 12:41:28,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629086663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:28,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:41:28,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-03 12:41:28,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678485311] [2021-10-03 12:41:28,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-03 12:41:28,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:41:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-03 12:41:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-10-03 12:41:28,609 INFO L87 Difference]: Start difference. First operand 349 states and 839 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:41:28,806 INFO L93 Difference]: Finished difference Result 353 states and 829 transitions. [2021-10-03 12:41:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-03 12:41:28,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-03 12:41:28,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:41:28,809 INFO L225 Difference]: With dead ends: 353 [2021-10-03 12:41:28,809 INFO L226 Difference]: Without dead ends: 303 [2021-10-03 12:41:28,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 432.1ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-10-03 12:41:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-10-03 12:41:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 261. [2021-10-03 12:41:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.4153846153846152) internal successors, (628), 260 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 628 transitions. [2021-10-03 12:41:28,817 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 628 transitions. Word has length 33 [2021-10-03 12:41:28,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:41:28,818 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 628 transitions. [2021-10-03 12:41:28,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:28,818 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 628 transitions. [2021-10-03 12:41:28,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:41:28,819 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:41:28,820 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:41:28,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-03 12:41:29,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:29,035 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:41:29,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:41:29,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1645916960, now seen corresponding path program 7 times [2021-10-03 12:41:29,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:41:29,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344163968] [2021-10-03 12:41:29,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:41:29,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:41:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:41:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-03 12:41:29,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:41:29,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344163968] [2021-10-03 12:41:29,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344163968] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:29,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443105984] [2021-10-03 12:41:29,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:41:29,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:29,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:41:29,273 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:41:29,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-03 12:41:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:41:30,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-03 12:41:30,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:41:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:41:31,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443105984] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:31,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:41:31,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-03 12:41:31,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276418257] [2021-10-03 12:41:31,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:41:31,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:41:31,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:41:31,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:41:31,248 INFO L87 Difference]: Start difference. First operand 261 states and 628 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:31,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:41:31,603 INFO L93 Difference]: Finished difference Result 413 states and 954 transitions. [2021-10-03 12:41:31,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-03 12:41:31,604 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-03 12:41:31,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:41:31,607 INFO L225 Difference]: With dead ends: 413 [2021-10-03 12:41:31,607 INFO L226 Difference]: Without dead ends: 362 [2021-10-03 12:41:31,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 500.2ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:41:31,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-10-03 12:41:31,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 292. [2021-10-03 12:41:31,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.443298969072165) internal successors, (711), 291 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 711 transitions. [2021-10-03 12:41:31,615 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 711 transitions. Word has length 33 [2021-10-03 12:41:31,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:41:31,615 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 711 transitions. [2021-10-03 12:41:31,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:31,615 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 711 transitions. [2021-10-03 12:41:31,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:41:31,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:41:31,616 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:41:31,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-03 12:41:31,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-03 12:41:31,817 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:41:31,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:41:31,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1028723586, now seen corresponding path program 8 times [2021-10-03 12:41:31,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:41:31,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753277560] [2021-10-03 12:41:31,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:41:31,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:41:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:41:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:41:32,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:41:32,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753277560] [2021-10-03 12:41:32,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753277560] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:32,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923319354] [2021-10-03 12:41:32,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:41:32,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:32,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:41:32,745 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:41:32,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-03 12:41:33,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:41:33,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:41:33,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-03 12:41:33,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:41:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-03 12:41:35,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923319354] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:35,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:41:35,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 24 [2021-10-03 12:41:35,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305958218] [2021-10-03 12:41:35,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-03 12:41:35,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:41:35,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-03 12:41:35,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-10-03 12:41:35,515 INFO L87 Difference]: Start difference. First operand 292 states and 711 transitions. Second operand has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:41:37,326 INFO L93 Difference]: Finished difference Result 429 states and 1002 transitions. [2021-10-03 12:41:37,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-03 12:41:37,327 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-03 12:41:37,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:41:37,329 INFO L225 Difference]: With dead ends: 429 [2021-10-03 12:41:37,329 INFO L226 Difference]: Without dead ends: 398 [2021-10-03 12:41:37,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 2086.1ms TimeCoverageRelationStatistics Valid=290, Invalid=1966, Unknown=0, NotChecked=0, Total=2256 [2021-10-03 12:41:37,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-10-03 12:41:37,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 350. [2021-10-03 12:41:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.361031518624642) internal successors, (824), 349 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 824 transitions. [2021-10-03 12:41:37,339 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 824 transitions. Word has length 33 [2021-10-03 12:41:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:41:37,340 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 824 transitions. [2021-10-03 12:41:37,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 824 transitions. [2021-10-03 12:41:37,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:41:37,342 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:41:37,342 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:41:37,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-03 12:41:37,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-03 12:41:37,557 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:41:37,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:41:37,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1760042776, now seen corresponding path program 9 times [2021-10-03 12:41:37,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:41:37,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400849469] [2021-10-03 12:41:37,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:41:37,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:41:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:41:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:41:39,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:41:39,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400849469] [2021-10-03 12:41:39,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400849469] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:39,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369142988] [2021-10-03 12:41:39,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:41:39,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:39,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:41:39,973 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:41:39,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-03 12:41:41,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-03 12:41:41,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:41:41,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-03 12:41:41,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:41:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-03 12:41:42,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369142988] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:42,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:41:42,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 26 [2021-10-03 12:41:42,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034278367] [2021-10-03 12:41:42,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:41:42,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:41:42,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:41:42,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:41:42,832 INFO L87 Difference]: Start difference. First operand 350 states and 824 transitions. Second operand has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:41:46,267 INFO L93 Difference]: Finished difference Result 485 states and 1104 transitions. [2021-10-03 12:41:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-03 12:41:46,268 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-03 12:41:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:41:46,270 INFO L225 Difference]: With dead ends: 485 [2021-10-03 12:41:46,270 INFO L226 Difference]: Without dead ends: 382 [2021-10-03 12:41:46,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 3617.8ms TimeCoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2021-10-03 12:41:46,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-10-03 12:41:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 216. [2021-10-03 12:41:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.6372093023255814) internal successors, (567), 215 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 567 transitions. [2021-10-03 12:41:46,277 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 567 transitions. Word has length 33 [2021-10-03 12:41:46,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:41:46,277 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 567 transitions. [2021-10-03 12:41:46,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:46,277 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 567 transitions. [2021-10-03 12:41:46,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:41:46,278 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:41:46,278 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:41:46,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-03 12:41:46,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:46,479 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:41:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:41:46,480 INFO L82 PathProgramCache]: Analyzing trace with hash -7999415, now seen corresponding path program 10 times [2021-10-03 12:41:46,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:41:46,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690775935] [2021-10-03 12:41:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:41:46,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:41:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:41:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-03 12:41:47,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:41:47,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690775935] [2021-10-03 12:41:47,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690775935] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:47,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550695927] [2021-10-03 12:41:47,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:41:47,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:47,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:41:47,191 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:41:47,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-03 12:41:48,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:41:48,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:41:48,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-03 12:41:48,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:41:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:41:50,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550695927] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:50,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:41:50,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 27 [2021-10-03 12:41:50,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451720260] [2021-10-03 12:41:50,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:41:50,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:41:50,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:41:50,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:41:50,769 INFO L87 Difference]: Start difference. First operand 216 states and 567 transitions. Second operand has 29 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:52,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:41:52,853 INFO L93 Difference]: Finished difference Result 456 states and 1125 transitions. [2021-10-03 12:41:52,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-03 12:41:52,854 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-03 12:41:52,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:41:52,857 INFO L225 Difference]: With dead ends: 456 [2021-10-03 12:41:52,857 INFO L226 Difference]: Without dead ends: 423 [2021-10-03 12:41:52,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 2496.5ms TimeCoverageRelationStatistics Valid=324, Invalid=2226, Unknown=0, NotChecked=0, Total=2550 [2021-10-03 12:41:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-10-03 12:41:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 318. [2021-10-03 12:41:52,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.545741324921136) internal successors, (807), 317 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 807 transitions. [2021-10-03 12:41:52,866 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 807 transitions. Word has length 34 [2021-10-03 12:41:52,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:41:52,866 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 807 transitions. [2021-10-03 12:41:52,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:52,866 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 807 transitions. [2021-10-03 12:41:52,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:41:52,867 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:41:52,867 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:41:52,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-03 12:41:53,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-03 12:41:53,071 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:41:53,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:41:53,071 INFO L82 PathProgramCache]: Analyzing trace with hash -401026425, now seen corresponding path program 11 times [2021-10-03 12:41:53,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:41:53,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49711996] [2021-10-03 12:41:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:41:53,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:41:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:41:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-03 12:41:53,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:41:53,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49711996] [2021-10-03 12:41:53,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49711996] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:53,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616134721] [2021-10-03 12:41:53,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:41:53,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:53,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:41:53,481 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:41:53,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-03 12:41:54,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-03 12:41:54,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:41:54,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:41:54,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:41:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:41:56,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616134721] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:56,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:41:56,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-10-03 12:41:56,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111046998] [2021-10-03 12:41:56,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-03 12:41:56,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:41:56,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-03 12:41:56,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-10-03 12:41:56,865 INFO L87 Difference]: Start difference. First operand 318 states and 807 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:41:58,015 INFO L93 Difference]: Finished difference Result 388 states and 943 transitions. [2021-10-03 12:41:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-03 12:41:58,015 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-03 12:41:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:41:58,018 INFO L225 Difference]: With dead ends: 388 [2021-10-03 12:41:58,018 INFO L226 Difference]: Without dead ends: 343 [2021-10-03 12:41:58,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1457.3ms TimeCoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2021-10-03 12:41:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-10-03 12:41:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 275. [2021-10-03 12:41:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.591240875912409) internal successors, (710), 274 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 710 transitions. [2021-10-03 12:41:58,025 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 710 transitions. Word has length 34 [2021-10-03 12:41:58,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:41:58,025 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 710 transitions. [2021-10-03 12:41:58,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:41:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 710 transitions. [2021-10-03 12:41:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:41:58,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:41:58,027 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:41:58,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-03 12:41:58,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:58,241 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:41:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:41:58,241 INFO L82 PathProgramCache]: Analyzing trace with hash 436658298, now seen corresponding path program 12 times [2021-10-03 12:41:58,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:41:58,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868574624] [2021-10-03 12:41:58,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:41:58,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:41:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:41:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:41:59,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:41:59,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868574624] [2021-10-03 12:41:59,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868574624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:41:59,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962968638] [2021-10-03 12:41:59,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:41:59,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:41:59,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:41:59,347 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:41:59,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-03 12:42:00,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-03 12:42:00,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:42:00,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-03 12:42:00,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:42:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:42:03,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962968638] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:03,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:42:03,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 38 [2021-10-03 12:42:03,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059557808] [2021-10-03 12:42:03,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-03 12:42:03,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:42:03,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-03 12:42:03,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2021-10-03 12:42:03,776 INFO L87 Difference]: Start difference. First operand 275 states and 710 transitions. Second operand has 40 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:07,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:42:07,391 INFO L93 Difference]: Finished difference Result 758 states and 2057 transitions. [2021-10-03 12:42:07,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-03 12:42:07,392 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:42:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:42:07,397 INFO L225 Difference]: With dead ends: 758 [2021-10-03 12:42:07,397 INFO L226 Difference]: Without dead ends: 693 [2021-10-03 12:42:07,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4066.7ms TimeCoverageRelationStatistics Valid=319, Invalid=3713, Unknown=0, NotChecked=0, Total=4032 [2021-10-03 12:42:07,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-10-03 12:42:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 474. [2021-10-03 12:42:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.758985200845666) internal successors, (1305), 473 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1305 transitions. [2021-10-03 12:42:07,411 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1305 transitions. Word has length 35 [2021-10-03 12:42:07,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:42:07,411 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1305 transitions. [2021-10-03 12:42:07,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1305 transitions. [2021-10-03 12:42:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:42:07,413 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:42:07,414 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:42:07,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-03 12:42:07,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:42:07,629 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:42:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:42:07,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1586752308, now seen corresponding path program 13 times [2021-10-03 12:42:07,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:42:07,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989290435] [2021-10-03 12:42:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:42:07,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:42:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:42:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:42:10,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:42:10,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989290435] [2021-10-03 12:42:10,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989290435] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:10,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044232378] [2021-10-03 12:42:10,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:42:10,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:42:10,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:42:10,219 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:42:10,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-03 12:42:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:42:11,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-03 12:42:11,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:42:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-03 12:42:13,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044232378] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:13,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:42:13,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 29 [2021-10-03 12:42:13,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636251718] [2021-10-03 12:42:13,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-03 12:42:13,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:42:13,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-03 12:42:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-10-03 12:42:13,599 INFO L87 Difference]: Start difference. First operand 474 states and 1305 transitions. Second operand has 31 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:42:16,196 INFO L93 Difference]: Finished difference Result 729 states and 1868 transitions. [2021-10-03 12:42:16,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-03 12:42:16,196 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:42:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:42:16,200 INFO L225 Difference]: With dead ends: 729 [2021-10-03 12:42:16,200 INFO L226 Difference]: Without dead ends: 718 [2021-10-03 12:42:16,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 3454.4ms TimeCoverageRelationStatistics Valid=295, Invalid=2461, Unknown=0, NotChecked=0, Total=2756 [2021-10-03 12:42:16,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-10-03 12:42:16,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 442. [2021-10-03 12:42:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.795918367346939) internal successors, (1233), 441 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1233 transitions. [2021-10-03 12:42:16,215 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1233 transitions. Word has length 35 [2021-10-03 12:42:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:42:16,216 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1233 transitions. [2021-10-03 12:42:16,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1233 transitions. [2021-10-03 12:42:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-03 12:42:16,218 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:42:16,218 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:42:16,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-03 12:42:16,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-03 12:42:16,430 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:42:16,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:42:16,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1777578589, now seen corresponding path program 14 times [2021-10-03 12:42:16,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:42:16,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178171708] [2021-10-03 12:42:16,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:42:16,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:42:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:42:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:42:17,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:42:17,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178171708] [2021-10-03 12:42:17,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178171708] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:17,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867216416] [2021-10-03 12:42:17,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:42:17,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:42:17,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:42:17,997 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:42:17,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-03 12:42:19,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:42:19,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:42:19,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-03 12:42:19,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:42:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:42:22,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867216416] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:22,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:42:22,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 36 [2021-10-03 12:42:22,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528321645] [2021-10-03 12:42:22,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-03 12:42:22,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:42:22,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-03 12:42:22,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-10-03 12:42:22,306 INFO L87 Difference]: Start difference. First operand 442 states and 1233 transitions. Second operand has 38 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:29,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:42:29,460 INFO L93 Difference]: Finished difference Result 859 states and 2248 transitions. [2021-10-03 12:42:29,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-03 12:42:29,461 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-03 12:42:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:42:29,466 INFO L225 Difference]: With dead ends: 859 [2021-10-03 12:42:29,466 INFO L226 Difference]: Without dead ends: 852 [2021-10-03 12:42:29,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 6538.4ms TimeCoverageRelationStatistics Valid=577, Invalid=5743, Unknown=0, NotChecked=0, Total=6320 [2021-10-03 12:42:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-10-03 12:42:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 567. [2021-10-03 12:42:29,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.7031802120141344) internal successors, (1530), 566 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1530 transitions. [2021-10-03 12:42:29,484 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1530 transitions. Word has length 36 [2021-10-03 12:42:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:42:29,484 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1530 transitions. [2021-10-03 12:42:29,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1530 transitions. [2021-10-03 12:42:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-03 12:42:29,486 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:42:29,486 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:42:29,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-03 12:42:29,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-03 12:42:29,700 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:42:29,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:42:29,700 INFO L82 PathProgramCache]: Analyzing trace with hash 971448317, now seen corresponding path program 15 times [2021-10-03 12:42:29,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:42:29,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896868305] [2021-10-03 12:42:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:42:29,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:42:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:42:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-03 12:42:30,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:42:30,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896868305] [2021-10-03 12:42:30,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896868305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:30,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769114883] [2021-10-03 12:42:30,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:42:30,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:42:30,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:42:30,024 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:42:30,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-03 12:42:31,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-03 12:42:31,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:42:31,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-03 12:42:31,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:42:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-03 12:42:32,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769114883] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:32,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:42:32,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-10-03 12:42:32,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341575055] [2021-10-03 12:42:32,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 12:42:32,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:42:32,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 12:42:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:42:32,317 INFO L87 Difference]: Start difference. First operand 567 states and 1530 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:42:32,838 INFO L93 Difference]: Finished difference Result 625 states and 1562 transitions. [2021-10-03 12:42:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:42:32,838 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-03 12:42:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:42:32,842 INFO L225 Difference]: With dead ends: 625 [2021-10-03 12:42:32,843 INFO L226 Difference]: Without dead ends: 621 [2021-10-03 12:42:32,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 553.9ms TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2021-10-03 12:42:32,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-10-03 12:42:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 501. [2021-10-03 12:42:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.444) internal successors, (1222), 500 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1222 transitions. [2021-10-03 12:42:32,855 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1222 transitions. Word has length 36 [2021-10-03 12:42:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:42:32,856 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1222 transitions. [2021-10-03 12:42:32,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1222 transitions. [2021-10-03 12:42:32,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-03 12:42:32,858 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:42:32,858 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:42:32,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-03 12:42:33,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-03 12:42:33,072 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:42:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:42:33,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1729172523, now seen corresponding path program 16 times [2021-10-03 12:42:33,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:42:33,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467705757] [2021-10-03 12:42:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:42:33,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:42:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:42:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-03 12:42:33,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:42:33,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467705757] [2021-10-03 12:42:33,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467705757] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:33,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133218042] [2021-10-03 12:42:33,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:42:33,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:42:33,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:42:33,366 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:42:33,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-03 12:42:34,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:42:34,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:42:34,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-03 12:42:34,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:42:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-03 12:42:35,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133218042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:35,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:42:35,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-03 12:42:35,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421169540] [2021-10-03 12:42:35,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:42:35,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:42:35,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:42:35,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:42:35,572 INFO L87 Difference]: Start difference. First operand 501 states and 1222 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:35,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:42:35,789 INFO L93 Difference]: Finished difference Result 709 states and 1682 transitions. [2021-10-03 12:42:35,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:42:35,790 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-03 12:42:35,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:42:35,793 INFO L225 Difference]: With dead ends: 709 [2021-10-03 12:42:35,794 INFO L226 Difference]: Without dead ends: 649 [2021-10-03 12:42:35,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 283.0ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:42:35,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-10-03 12:42:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 518. [2021-10-03 12:42:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.382978723404255) internal successors, (1232), 517 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1232 transitions. [2021-10-03 12:42:35,806 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1232 transitions. Word has length 36 [2021-10-03 12:42:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:42:35,806 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 1232 transitions. [2021-10-03 12:42:35,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1232 transitions. [2021-10-03 12:42:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-03 12:42:35,808 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:42:35,808 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:42:35,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-03 12:42:36,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:42:36,025 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:42:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:42:36,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1052426501, now seen corresponding path program 17 times [2021-10-03 12:42:36,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:42:36,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040340046] [2021-10-03 12:42:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:42:36,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:42:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:42:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:42:37,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:42:37,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040340046] [2021-10-03 12:42:37,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040340046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:37,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062719353] [2021-10-03 12:42:37,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:42:37,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:42:37,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:42:37,055 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:42:37,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-03 12:42:38,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-03 12:42:38,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:42:38,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-03 12:42:38,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:42:41,887 INFO L354 Elim1Store]: treesize reduction 243, result has 40.9 percent of original size [2021-10-03 12:42:41,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 185 treesize of output 234 [2021-10-03 12:42:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:42:41,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062719353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:41,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:42:41,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 31 [2021-10-03 12:42:41,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486024333] [2021-10-03 12:42:41,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-03 12:42:41,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:42:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-03 12:42:41,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2021-10-03 12:42:41,972 INFO L87 Difference]: Start difference. First operand 518 states and 1232 transitions. Second operand has 33 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:44,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:42:44,978 INFO L93 Difference]: Finished difference Result 738 states and 1756 transitions. [2021-10-03 12:42:44,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 12:42:44,980 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-03 12:42:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:42:44,985 INFO L225 Difference]: With dead ends: 738 [2021-10-03 12:42:44,985 INFO L226 Difference]: Without dead ends: 634 [2021-10-03 12:42:44,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3742.8ms TimeCoverageRelationStatistics Valid=193, Invalid=2257, Unknown=0, NotChecked=0, Total=2450 [2021-10-03 12:42:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-10-03 12:42:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 524. [2021-10-03 12:42:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.332695984703633) internal successors, (1220), 523 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1220 transitions. [2021-10-03 12:42:44,998 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1220 transitions. Word has length 36 [2021-10-03 12:42:44,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:42:44,998 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1220 transitions. [2021-10-03 12:42:44,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1220 transitions. [2021-10-03 12:42:45,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-03 12:42:45,000 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:42:45,000 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:42:45,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-03 12:42:45,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:42:45,215 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:42:45,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:42:45,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1414278752, now seen corresponding path program 18 times [2021-10-03 12:42:45,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:42:45,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327904632] [2021-10-03 12:42:45,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:42:45,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:42:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:42:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-03 12:42:45,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:42:45,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327904632] [2021-10-03 12:42:45,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327904632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:45,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024561382] [2021-10-03 12:42:45,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:42:45,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:42:45,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:42:45,489 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:42:45,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-03 12:42:47,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-03 12:42:47,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:42:47,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:42:47,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:42:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-03 12:42:48,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024561382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:48,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:42:48,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-10-03 12:42:48,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324066486] [2021-10-03 12:42:48,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 12:42:48,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:42:48,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 12:42:48,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:42:48,721 INFO L87 Difference]: Start difference. First operand 524 states and 1220 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:49,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:42:49,201 INFO L93 Difference]: Finished difference Result 724 states and 1664 transitions. [2021-10-03 12:42:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:42:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-03 12:42:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:42:49,205 INFO L225 Difference]: With dead ends: 724 [2021-10-03 12:42:49,205 INFO L226 Difference]: Without dead ends: 626 [2021-10-03 12:42:49,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 755.3ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:42:49,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-10-03 12:42:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 470. [2021-10-03 12:42:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.3475479744136463) internal successors, (1101), 469 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1101 transitions. [2021-10-03 12:42:49,218 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1101 transitions. Word has length 37 [2021-10-03 12:42:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:42:49,218 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 1101 transitions. [2021-10-03 12:42:49,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1101 transitions. [2021-10-03 12:42:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-03 12:42:49,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:42:49,220 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:42:49,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-03 12:42:49,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:42:49,436 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:42:49,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:42:49,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1194485592, now seen corresponding path program 19 times [2021-10-03 12:42:49,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:42:49,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313402024] [2021-10-03 12:42:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:42:49,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:42:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:42:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-03 12:42:49,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:42:49,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313402024] [2021-10-03 12:42:49,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313402024] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:49,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735157638] [2021-10-03 12:42:49,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:42:49,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:42:49,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:42:49,690 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:42:49,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-03 12:42:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:42:51,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-03 12:42:51,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:42:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-03 12:42:53,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735157638] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:53,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:42:53,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-03 12:42:53,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398305946] [2021-10-03 12:42:53,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-03 12:42:53,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:42:53,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-03 12:42:53,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:42:53,090 INFO L87 Difference]: Start difference. First operand 470 states and 1101 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:42:53,456 INFO L93 Difference]: Finished difference Result 570 states and 1310 transitions. [2021-10-03 12:42:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-03 12:42:53,456 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-03 12:42:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:42:53,459 INFO L225 Difference]: With dead ends: 570 [2021-10-03 12:42:53,459 INFO L226 Difference]: Without dead ends: 540 [2021-10-03 12:42:53,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 498.3ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:42:53,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-10-03 12:42:53,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 344. [2021-10-03 12:42:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.3965014577259476) internal successors, (822), 343 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:53,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 822 transitions. [2021-10-03 12:42:53,470 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 822 transitions. Word has length 37 [2021-10-03 12:42:53,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:42:53,471 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 822 transitions. [2021-10-03 12:42:53,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:53,471 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 822 transitions. [2021-10-03 12:42:53,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-03 12:42:53,472 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:42:53,472 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:42:53,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-03 12:42:53,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:42:53,688 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:42:53,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:42:53,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1414573870, now seen corresponding path program 20 times [2021-10-03 12:42:53,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:42:53,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311005324] [2021-10-03 12:42:53,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:42:53,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:42:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:42:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-03 12:42:54,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:42:54,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311005324] [2021-10-03 12:42:54,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311005324] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:54,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553282517] [2021-10-03 12:42:54,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:42:54,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:42:54,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:42:54,215 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:42:54,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-03 12:42:56,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:42:56,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:42:56,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:42:56,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:42:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-03 12:42:58,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553282517] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:42:58,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:42:58,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-10-03 12:42:58,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027168219] [2021-10-03 12:42:58,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-03 12:42:58,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:42:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-03 12:42:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:42:58,020 INFO L87 Difference]: Start difference. First operand 344 states and 822 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:42:59,446 INFO L93 Difference]: Finished difference Result 712 states and 1840 transitions. [2021-10-03 12:42:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 12:42:59,447 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-03 12:42:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:42:59,451 INFO L225 Difference]: With dead ends: 712 [2021-10-03 12:42:59,451 INFO L226 Difference]: Without dead ends: 662 [2021-10-03 12:42:59,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1467.1ms TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 12:42:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-10-03 12:42:59,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 410. [2021-10-03 12:42:59,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.6968215158924207) internal successors, (1103), 409 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1103 transitions. [2021-10-03 12:42:59,463 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1103 transitions. Word has length 37 [2021-10-03 12:42:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:42:59,464 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1103 transitions. [2021-10-03 12:42:59,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:42:59,464 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1103 transitions. [2021-10-03 12:42:59,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-03 12:42:59,465 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:42:59,466 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:42:59,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-03 12:42:59,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:42:59,682 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:42:59,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:42:59,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1049876674, now seen corresponding path program 21 times [2021-10-03 12:42:59,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:42:59,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377284907] [2021-10-03 12:42:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:42:59,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:43:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:43:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:43:01,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:43:01,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377284907] [2021-10-03 12:43:01,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377284907] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:43:01,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791430378] [2021-10-03 12:43:01,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:43:01,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:43:01,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:43:01,217 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:43:01,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-03 12:43:03,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-03 12:43:03,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:43:03,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-03 12:43:03,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:43:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:43:06,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791430378] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:43:06,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:43:06,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 35 [2021-10-03 12:43:06,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648243310] [2021-10-03 12:43:06,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-03 12:43:06,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:43:06,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-03 12:43:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2021-10-03 12:43:06,136 INFO L87 Difference]: Start difference. First operand 410 states and 1103 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:09,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:43:09,811 INFO L93 Difference]: Finished difference Result 659 states and 1638 transitions. [2021-10-03 12:43:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-03 12:43:09,812 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-03 12:43:09,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:43:09,815 INFO L225 Difference]: With dead ends: 659 [2021-10-03 12:43:09,815 INFO L226 Difference]: Without dead ends: 617 [2021-10-03 12:43:09,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 4423.1ms TimeCoverageRelationStatistics Valid=328, Invalid=3454, Unknown=0, NotChecked=0, Total=3782 [2021-10-03 12:43:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-10-03 12:43:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 336. [2021-10-03 12:43:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.9313432835820894) internal successors, (982), 335 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 982 transitions. [2021-10-03 12:43:09,825 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 982 transitions. Word has length 37 [2021-10-03 12:43:09,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:43:09,826 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 982 transitions. [2021-10-03 12:43:09,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:09,826 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 982 transitions. [2021-10-03 12:43:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-03 12:43:09,827 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:43:09,828 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:43:09,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-03 12:43:10,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-03 12:43:10,043 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:43:10,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:43:10,044 INFO L82 PathProgramCache]: Analyzing trace with hash 982253654, now seen corresponding path program 22 times [2021-10-03 12:43:10,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:43:10,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400158334] [2021-10-03 12:43:10,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:43:10,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:43:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:43:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-03 12:43:10,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:43:10,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400158334] [2021-10-03 12:43:10,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400158334] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:43:10,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889314881] [2021-10-03 12:43:10,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:43:10,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:43:10,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:43:10,449 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:43:10,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-03 12:43:12,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:43:12,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:43:12,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-03 12:43:12,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:43:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-03 12:43:14,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889314881] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:43:14,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:43:14,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-10-03 12:43:14,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766964093] [2021-10-03 12:43:14,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-03 12:43:14,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:43:14,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-03 12:43:14,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-10-03 12:43:14,597 INFO L87 Difference]: Start difference. First operand 336 states and 982 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:43:15,484 INFO L93 Difference]: Finished difference Result 886 states and 2417 transitions. [2021-10-03 12:43:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-03 12:43:15,485 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-03 12:43:15,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:43:15,490 INFO L225 Difference]: With dead ends: 886 [2021-10-03 12:43:15,491 INFO L226 Difference]: Without dead ends: 771 [2021-10-03 12:43:15,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1188.5ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-10-03 12:43:15,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-10-03 12:43:15,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 337. [2021-10-03 12:43:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.267857142857143) internal successors, (1098), 336 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1098 transitions. [2021-10-03 12:43:15,504 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1098 transitions. Word has length 37 [2021-10-03 12:43:15,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:43:15,505 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1098 transitions. [2021-10-03 12:43:15,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:15,505 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1098 transitions. [2021-10-03 12:43:15,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 12:43:15,506 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:43:15,506 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:43:15,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-03 12:43:15,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-03 12:43:15,722 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:43:15,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:43:15,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1796765659, now seen corresponding path program 23 times [2021-10-03 12:43:15,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:43:15,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724149481] [2021-10-03 12:43:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:43:15,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:43:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:43:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-03 12:43:16,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:43:16,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724149481] [2021-10-03 12:43:16,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724149481] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:43:16,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39730866] [2021-10-03 12:43:16,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:43:16,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:43:16,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:43:16,236 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:43:16,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-03 12:43:18,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-03 12:43:18,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:43:18,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-03 12:43:18,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:43:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:43:21,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39730866] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:43:21,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:43:21,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-10-03 12:43:21,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417262539] [2021-10-03 12:43:21,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:43:21,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:43:21,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:43:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:43:21,281 INFO L87 Difference]: Start difference. First operand 337 states and 1098 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:22,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:43:22,410 INFO L93 Difference]: Finished difference Result 609 states and 1886 transitions. [2021-10-03 12:43:22,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:43:22,410 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 12:43:22,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:43:22,415 INFO L225 Difference]: With dead ends: 609 [2021-10-03 12:43:22,415 INFO L226 Difference]: Without dead ends: 573 [2021-10-03 12:43:22,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1451.4ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-10-03 12:43:22,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-10-03 12:43:22,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 367. [2021-10-03 12:43:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.390710382513661) internal successors, (1241), 366 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:22,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1241 transitions. [2021-10-03 12:43:22,429 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1241 transitions. Word has length 38 [2021-10-03 12:43:22,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:43:22,429 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1241 transitions. [2021-10-03 12:43:22,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:22,430 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1241 transitions. [2021-10-03 12:43:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-03 12:43:22,431 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:43:22,432 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:43:22,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-03 12:43:22,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:43:22,648 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:43:22,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:43:22,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1896198902, now seen corresponding path program 24 times [2021-10-03 12:43:22,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:43:22,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636027895] [2021-10-03 12:43:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:43:22,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:43:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:43:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-03 12:43:23,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:43:23,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636027895] [2021-10-03 12:43:23,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636027895] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:43:23,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814134348] [2021-10-03 12:43:23,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:43:23,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:43:23,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:43:23,205 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:43:23,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-03 12:43:25,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-03 12:43:25,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:43:25,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-03 12:43:25,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:43:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:43:29,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814134348] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:43:29,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:43:29,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 35 [2021-10-03 12:43:29,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516063205] [2021-10-03 12:43:29,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-03 12:43:29,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:43:29,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-03 12:43:29,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 12:43:29,492 INFO L87 Difference]: Start difference. First operand 367 states and 1241 transitions. Second operand has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:43:31,671 INFO L93 Difference]: Finished difference Result 424 states and 1193 transitions. [2021-10-03 12:43:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-03 12:43:31,671 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-03 12:43:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:43:31,674 INFO L225 Difference]: With dead ends: 424 [2021-10-03 12:43:31,674 INFO L226 Difference]: Without dead ends: 342 [2021-10-03 12:43:31,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 3245.8ms TimeCoverageRelationStatistics Valid=301, Invalid=3239, Unknown=0, NotChecked=0, Total=3540 [2021-10-03 12:43:31,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-10-03 12:43:31,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 322. [2021-10-03 12:43:31,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.2118380062305296) internal successors, (1031), 321 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1031 transitions. [2021-10-03 12:43:31,682 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1031 transitions. Word has length 39 [2021-10-03 12:43:31,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:43:31,683 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1031 transitions. [2021-10-03 12:43:31,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1031 transitions. [2021-10-03 12:43:31,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-03 12:43:31,684 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:43:31,684 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:43:31,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-03 12:43:31,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-03 12:43:31,885 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:43:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:43:31,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1552779580, now seen corresponding path program 25 times [2021-10-03 12:43:31,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:43:31,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551565900] [2021-10-03 12:43:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:43:31,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:43:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:43:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:43:33,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:43:33,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551565900] [2021-10-03 12:43:33,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551565900] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:43:33,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746927427] [2021-10-03 12:43:33,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:43:33,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:43:33,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:43:33,994 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:43:33,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-03 12:43:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:43:36,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-03 12:43:36,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:43:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:43:41,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746927427] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:43:41,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:43:41,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 46 [2021-10-03 12:43:41,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970808712] [2021-10-03 12:43:41,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-03 12:43:41,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:43:41,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-03 12:43:41,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2131, Unknown=0, NotChecked=0, Total=2256 [2021-10-03 12:43:41,062 INFO L87 Difference]: Start difference. First operand 322 states and 1031 transitions. Second operand has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:43:50,249 INFO L93 Difference]: Finished difference Result 838 states and 2050 transitions. [2021-10-03 12:43:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-03 12:43:50,250 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-03 12:43:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:43:50,252 INFO L225 Difference]: With dead ends: 838 [2021-10-03 12:43:50,253 INFO L226 Difference]: Without dead ends: 378 [2021-10-03 12:43:50,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 9939.9ms TimeCoverageRelationStatistics Valid=641, Invalid=9061, Unknown=0, NotChecked=0, Total=9702 [2021-10-03 12:43:50,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-10-03 12:43:50,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 317. [2021-10-03 12:43:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.2373417721518987) internal successors, (1023), 316 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 1023 transitions. [2021-10-03 12:43:50,261 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 1023 transitions. Word has length 41 [2021-10-03 12:43:50,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:43:50,262 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 1023 transitions. [2021-10-03 12:43:50,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:50,262 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 1023 transitions. [2021-10-03 12:43:50,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-03 12:43:50,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:43:50,263 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:43:50,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-03 12:43:50,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:43:50,475 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:43:50,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:43:50,476 INFO L82 PathProgramCache]: Analyzing trace with hash -718675174, now seen corresponding path program 26 times [2021-10-03 12:43:50,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:43:50,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185717440] [2021-10-03 12:43:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:43:50,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:43:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:43:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 23 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-03 12:43:50,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:43:50,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185717440] [2021-10-03 12:43:50,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185717440] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:43:50,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139155427] [2021-10-03 12:43:50,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:43:50,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:43:50,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:43:50,759 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:43:50,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-03 12:43:53,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:43:53,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:43:53,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:43:53,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:43:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-03 12:43:54,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139155427] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:43:54,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:43:54,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-03 12:43:54,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027792565] [2021-10-03 12:43:54,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-03 12:43:54,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:43:54,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-03 12:43:54,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:43:54,789 INFO L87 Difference]: Start difference. First operand 317 states and 1023 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:43:55,345 INFO L93 Difference]: Finished difference Result 400 states and 1151 transitions. [2021-10-03 12:43:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-03 12:43:55,345 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-03 12:43:55,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:43:55,347 INFO L225 Difference]: With dead ends: 400 [2021-10-03 12:43:55,347 INFO L226 Difference]: Without dead ends: 318 [2021-10-03 12:43:55,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 846.3ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:43:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-10-03 12:43:55,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2021-10-03 12:43:55,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.230283911671924) internal successors, (1024), 317 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 1024 transitions. [2021-10-03 12:43:55,354 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 1024 transitions. Word has length 41 [2021-10-03 12:43:55,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:43:55,354 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 1024 transitions. [2021-10-03 12:43:55,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:43:55,355 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 1024 transitions. [2021-10-03 12:43:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-03 12:43:55,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:43:55,356 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:43:55,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-10-03 12:43:55,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:43:55,557 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:43:55,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:43:55,559 INFO L82 PathProgramCache]: Analyzing trace with hash -108458621, now seen corresponding path program 27 times [2021-10-03 12:43:55,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:43:55,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611551144] [2021-10-03 12:43:55,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:43:55,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:43:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:43:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-03 12:43:57,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:43:57,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611551144] [2021-10-03 12:43:57,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611551144] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:43:57,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642186708] [2021-10-03 12:43:57,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:43:57,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:43:57,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:43:57,189 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:43:57,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-03 12:43:59,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-03 12:43:59,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:43:59,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-03 12:43:59,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:44:04,319 INFO L354 Elim1Store]: treesize reduction 312, result has 43.6 percent of original size [2021-10-03 12:44:04,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 217 treesize of output 318 [2021-10-03 12:44:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-03 12:44:04,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642186708] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:44:04,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:44:04,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 38 [2021-10-03 12:44:04,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971243780] [2021-10-03 12:44:04,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-03 12:44:04,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:44:04,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-03 12:44:04,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2021-10-03 12:44:04,414 INFO L87 Difference]: Start difference. First operand 318 states and 1024 transitions. Second operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:44:08,846 INFO L93 Difference]: Finished difference Result 467 states and 1296 transitions. [2021-10-03 12:44:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-03 12:44:08,846 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-03 12:44:08,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:44:08,847 INFO L225 Difference]: With dead ends: 467 [2021-10-03 12:44:08,847 INFO L226 Difference]: Without dead ends: 446 [2021-10-03 12:44:08,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 5254.3ms TimeCoverageRelationStatistics Valid=262, Invalid=3644, Unknown=0, NotChecked=0, Total=3906 [2021-10-03 12:44:08,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-10-03 12:44:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 421. [2021-10-03 12:44:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.8904761904761904) internal successors, (1214), 420 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:08,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1214 transitions. [2021-10-03 12:44:08,855 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1214 transitions. Word has length 42 [2021-10-03 12:44:08,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:44:08,855 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1214 transitions. [2021-10-03 12:44:08,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:08,856 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1214 transitions. [2021-10-03 12:44:08,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-03 12:44:08,856 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:44:08,856 INFO L512 BasicCegarLoop]: trace histogram [7, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:44:08,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-03 12:44:09,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-03 12:44:09,058 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:44:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:44:09,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1628385338, now seen corresponding path program 28 times [2021-10-03 12:44:09,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:44:09,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782596010] [2021-10-03 12:44:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:44:09,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:44:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:44:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-03 12:44:10,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:44:10,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782596010] [2021-10-03 12:44:10,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782596010] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:44:10,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311145302] [2021-10-03 12:44:10,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:44:10,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:44:10,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:44:10,789 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:44:10,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-03 12:44:13,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:44:13,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:44:13,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-03 12:44:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:44:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 57 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-03 12:44:17,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311145302] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:44:17,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:44:17,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-10-03 12:44:17,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064477932] [2021-10-03 12:44:17,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-03 12:44:17,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:44:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-03 12:44:17,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1604, Unknown=0, NotChecked=0, Total=1722 [2021-10-03 12:44:17,627 INFO L87 Difference]: Start difference. First operand 421 states and 1214 transitions. Second operand has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:23,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:44:23,606 INFO L93 Difference]: Finished difference Result 501 states and 925 transitions. [2021-10-03 12:44:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-03 12:44:23,607 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-03 12:44:23,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:44:23,607 INFO L225 Difference]: With dead ends: 501 [2021-10-03 12:44:23,608 INFO L226 Difference]: Without dead ends: 0 [2021-10-03 12:44:23,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 6930.3ms TimeCoverageRelationStatistics Valid=412, Invalid=5594, Unknown=0, NotChecked=0, Total=6006 [2021-10-03 12:44:23,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-03 12:44:23,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-03 12:44:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-03 12:44:23,609 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2021-10-03 12:44:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:44:23,609 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-03 12:44:23,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-03 12:44:23,609 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-03 12:44:23,612 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-03 12:44:23,612 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-03 12:44:23,612 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-03 12:44:23,612 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-03 12:44:23,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-03 12:44:23,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-10-03 12:44:23,818 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-03 12:44:23,819 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-03 12:44:23,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 12:44:23 BasicIcfg [2021-10-03 12:44:23,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-03 12:44:23,821 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-03 12:44:23,821 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-03 12:44:23,821 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-03 12:44:23,822 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:40:06" (3/4) ... [2021-10-03 12:44:23,825 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-03 12:44:23,831 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-03 12:44:23,832 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-03 12:44:23,832 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-03 12:44:23,843 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-03 12:44:23,843 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-03 12:44:23,844 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-03 12:44:23,930 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-03 12:44:23,930 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-03 12:44:23,931 INFO L168 Benchmark]: Toolchain (without parser) took 259358.09 ms. Allocated memory was 52.4 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 28.0 MB in the beginning and 763.3 MB in the end (delta: -735.3 MB). Peak memory consumption was 706.6 MB. Max. memory is 16.1 GB. [2021-10-03 12:44:23,931 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 52.4 MB. Free memory is still 33.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 12:44:23,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.65 ms. Allocated memory is still 52.4 MB. Free memory was 27.7 MB in the beginning and 27.3 MB in the end (delta: 454.2 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-10-03 12:44:23,932 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.29 ms. Allocated memory is still 52.4 MB. Free memory was 27.3 MB in the beginning and 24.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-03 12:44:23,933 INFO L168 Benchmark]: Boogie Preprocessor took 93.81 ms. Allocated memory is still 52.4 MB. Free memory was 24.7 MB in the beginning and 22.7 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 12:44:23,933 INFO L168 Benchmark]: RCFGBuilder took 1367.69 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 22.7 MB in the beginning and 36.6 MB in the end (delta: -13.9 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2021-10-03 12:44:23,934 INFO L168 Benchmark]: TraceAbstraction took 257348.20 ms. Allocated memory was 62.9 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 36.0 MB in the beginning and 766.9 MB in the end (delta: -730.9 MB). Peak memory consumption was 698.8 MB. Max. memory is 16.1 GB. [2021-10-03 12:44:23,934 INFO L168 Benchmark]: Witness Printer took 109.04 ms. Allocated memory is still 1.5 GB. Free memory was 766.9 MB in the beginning and 763.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-03 12:44:23,941 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 52.4 MB. Free memory is still 33.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 317.65 ms. Allocated memory is still 52.4 MB. Free memory was 27.7 MB in the beginning and 27.3 MB in the end (delta: 454.2 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 107.29 ms. Allocated memory is still 52.4 MB. Free memory was 27.3 MB in the beginning and 24.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 93.81 ms. Allocated memory is still 52.4 MB. Free memory was 24.7 MB in the beginning and 22.7 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1367.69 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 22.7 MB in the beginning and 36.6 MB in the end (delta: -13.9 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 257348.20 ms. Allocated memory was 62.9 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 36.0 MB in the beginning and 766.9 MB in the end (delta: -730.9 MB). Peak memory consumption was 698.8 MB. Max. memory is 16.1 GB. * Witness Printer took 109.04 ms. Allocated memory is still 1.5 GB. Free memory was 766.9 MB in the beginning and 763.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8630.1ms, 207 PlacesBefore, 33 PlacesAfterwards, 221 TransitionsBefore, 29 TransitionsAfterwards, 2196 CoEnabledTransitionPairs, 7 FixpointIterations, 139 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 16 TrivialYvCompositions, 4 ConcurrentYvCompositions, 18 ChoiceCompositions, 224 TotalNumberOfCompositions, 2138 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1984, positive: 1958, positive conditional: 0, positive unconditional: 1958, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1328, positive: 1322, positive conditional: 0, positive unconditional: 1322, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1328, positive: 1322, positive conditional: 0, positive unconditional: 1322, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 28, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1984, positive: 636, positive conditional: 0, positive unconditional: 636, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 1328, unknown conditional: 0, unknown unconditional: 1328] , Statistics on independence cache: Total cache size (in pairs): 44, Positive cache size: 42, Positive conditional cache size: 0, Positive unconditional cache size: 42, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 132]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 232 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 257124.7ms, OverallIterations: 53, TraceHistogramMax: 7, EmptinessCheckTime: 91.2ms, AutomataDifference: 75919.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8689.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1507 SDtfs, 6137 SDslu, 18234 SDs, 0 SdLazy, 28170 SolverSat, 2075 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23225.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2652 GetRequests, 1034 SyntacticMatches, 0 SemanticMatches, 1618 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13752 ImplicationChecksByTransitivity, 87026.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=567occurred in iteration=39, InterpolantAutomatonStates: 1021, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 572.0ms AutomataMinimizationTime, 53 MinimizatonAttempts, 5484 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1119.8ms SsaConstructionTime, 11623.3ms SatisfiabilityAnalysisTime, 101579.4ms InterpolantComputationTime, 3122 NumberOfCodeBlocks, 3117 NumberOfCodeBlocksAsserted, 195 NumberOfCheckSat, 3021 ConstructedInterpolants, 90 QuantifiedInterpolants, 64671 SizeOfPredicates, 1288 NumberOfNonLiveVariables, 12931 ConjunctsInSsa, 1208 ConjunctsInUnsatCore, 101 InterpolantComputations, 5 PerfectInterpolantSequences, 935/2481 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-03 12:44:24,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...