./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20/counter-fun.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/counter-fun.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 0f7dee16cde17726490095e08b25146d4d1119f1 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-04 18:52:28,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-04 18:52:28,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-04 18:52:28,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-04 18:52:28,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-04 18:52:28,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-04 18:52:28,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-04 18:52:28,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-04 18:52:28,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-04 18:52:28,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-04 18:52:28,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-04 18:52:28,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-04 18:52:28,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-04 18:52:28,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-04 18:52:28,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-04 18:52:28,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-04 18:52:28,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-04 18:52:28,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-04 18:52:28,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-04 18:52:28,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-04 18:52:28,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-04 18:52:28,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-04 18:52:28,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-04 18:52:28,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-04 18:52:29,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-04 18:52:29,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-04 18:52:29,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-04 18:52:29,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-04 18:52:29,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-04 18:52:29,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-04 18:52:29,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-04 18:52:29,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-04 18:52:29,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-04 18:52:29,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-04 18:52:29,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-04 18:52:29,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-04 18:52:29,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-04 18:52:29,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-04 18:52:29,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-04 18:52:29,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-04 18:52:29,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-04 18:52:29,028 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-04 18:52:29,069 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-04 18:52:29,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-04 18:52:29,070 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-04 18:52:29,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-04 18:52:29,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-04 18:52:29,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-04 18:52:29,072 INFO L138 SettingsManager]: * Use SBE=true [2021-10-04 18:52:29,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-04 18:52:29,073 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-04 18:52:29,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-04 18:52:29,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-04 18:52:29,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-04 18:52:29,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-04 18:52:29,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-04 18:52:29,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-04 18:52:29,075 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-04 18:52:29,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-04 18:52:29,075 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-04 18:52:29,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-04 18:52:29,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-04 18:52:29,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-04 18:52:29,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-04 18:52:29,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-04 18:52:29,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-04 18:52:29,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-04 18:52:29,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-04 18:52:29,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-04 18:52:29,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-04 18:52:29,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-04 18:52:29,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-04 18:52:29,079 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f7dee16cde17726490095e08b25146d4d1119f1 [2021-10-04 18:52:29,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-04 18:52:29,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-04 18:52:29,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-04 18:52:29,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-04 18:52:29,485 INFO L275 PluginConnector]: CDTParser initialized [2021-10-04 18:52:29,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20/counter-fun.wvr.c [2021-10-04 18:52:29,572 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77169fb3f/c7a35b715e2e48b285c953746712f959/FLAGba234d133 [2021-10-04 18:52:30,232 INFO L306 CDTParser]: Found 1 translation units. [2021-10-04 18:52:30,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/counter-fun.wvr.c [2021-10-04 18:52:30,234 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-04 18:52:30,234 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-04 18:52:30,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77169fb3f/c7a35b715e2e48b285c953746712f959/FLAGba234d133 [2021-10-04 18:52:30,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77169fb3f/c7a35b715e2e48b285c953746712f959 [2021-10-04 18:52:30,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-04 18:52:30,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-04 18:52:30,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-04 18:52:30,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-04 18:52:30,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-04 18:52:30,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 06:52:30" (1/1) ... [2021-10-04 18:52:30,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@284ffa97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:30, skipping insertion in model container [2021-10-04 18:52:30,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 06:52:30" (1/1) ... [2021-10-04 18:52:30,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-04 18:52:30,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-04 18:52:30,802 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-04 18:52:30,852 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/counter-fun.wvr.c[1482,1495] [2021-10-04 18:52:30,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-04 18:52:30,870 INFO L203 MainTranslator]: Completed pre-run [2021-10-04 18:52:30,882 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-04 18:52:30,898 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/counter-fun.wvr.c[1482,1495] [2021-10-04 18:52:30,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-04 18:52:30,930 INFO L208 MainTranslator]: Completed translation [2021-10-04 18:52:30,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:30 WrapperNode [2021-10-04 18:52:30,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-04 18:52:30,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-04 18:52:30,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-04 18:52:30,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-04 18:52:30,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:30" (1/1) ... [2021-10-04 18:52:30,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:30" (1/1) ... [2021-10-04 18:52:30,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-04 18:52:30,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-04 18:52:30,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-04 18:52:30,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-04 18:52:30,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:30" (1/1) ... [2021-10-04 18:52:30,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:30" (1/1) ... [2021-10-04 18:52:31,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:30" (1/1) ... [2021-10-04 18:52:31,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:30" (1/1) ... [2021-10-04 18:52:31,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:30" (1/1) ... [2021-10-04 18:52:31,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:30" (1/1) ... [2021-10-04 18:52:31,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:30" (1/1) ... [2021-10-04 18:52:31,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-04 18:52:31,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-04 18:52:31,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-04 18:52:31,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-04 18:52:31,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:30" (1/1) ... [2021-10-04 18:52:31,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-04 18:52:31,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:31,071 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) [2021-10-04 18:52:31,089 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 [2021-10-04 18:52:31,128 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-04 18:52:31,128 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-04 18:52:31,129 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-04 18:52:31,129 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-04 18:52:31,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-04 18:52:31,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-04 18:52:31,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-04 18:52:31,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-04 18:52:31,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-04 18:52:31,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-04 18:52:31,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-04 18:52:31,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-04 18:52:31,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-04 18:52:31,132 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-04 18:52:32,184 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-04 18:52:32,184 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-04 18:52:32,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 06:52:32 BoogieIcfgContainer [2021-10-04 18:52:32,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-04 18:52:32,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-04 18:52:32,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-04 18:52:32,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-04 18:52:32,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.10 06:52:30" (1/3) ... [2021-10-04 18:52:32,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602d63e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 06:52:32, skipping insertion in model container [2021-10-04 18:52:32,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:30" (2/3) ... [2021-10-04 18:52:32,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602d63e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 06:52:32, skipping insertion in model container [2021-10-04 18:52:32,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 06:52:32" (3/3) ... [2021-10-04 18:52:32,200 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-fun.wvr.c [2021-10-04 18:52:32,208 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-04 18:52:32,208 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-04 18:52:32,208 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-04 18:52:32,208 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-04 18:52:32,261 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,261 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,261 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,262 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,262 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,262 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,262 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,262 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,263 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,263 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,263 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,263 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,263 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,264 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,264 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,265 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,265 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,265 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,265 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,266 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,266 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,266 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,266 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,266 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,268 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,268 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,269 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,270 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,270 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,270 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,270 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,271 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,271 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,271 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,272 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,272 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,273 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,273 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,273 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,273 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,274 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,274 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,274 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,274 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,274 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,274 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,275 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,275 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,275 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,276 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,277 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,277 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,277 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,277 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,277 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,278 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,278 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,279 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,279 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,280 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,280 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,281 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,281 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,281 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,282 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,283 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,283 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,283 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,290 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,290 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,290 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,291 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,291 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,291 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,292 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,292 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,292 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,292 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,293 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,293 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,295 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,295 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,295 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,296 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,297 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,297 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,300 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,302 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,302 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,302 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,303 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,303 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:32,310 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-04 18:52:32,389 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-04 18:52:32,401 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 [2021-10-04 18:52:32,405 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-04 18:52:32,432 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-04 18:52:32,446 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 126 transitions, 268 flow [2021-10-04 18:52:32,454 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 126 transitions, 268 flow [2021-10-04 18:52:32,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 122 places, 126 transitions, 268 flow [2021-10-04 18:52:32,563 INFO L129 PetriNetUnfolder]: 11/124 cut-off events. [2021-10-04 18:52:32,563 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-04 18:52:32,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 124 events. 11/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 95. Up to 2 conditions per place. [2021-10-04 18:52:32,577 INFO L116 LiptonReduction]: Number of co-enabled transitions 432 [2021-10-04 18:52:37,512 INFO L131 LiptonReduction]: Checked pairs total: 501 [2021-10-04 18:52:37,513 INFO L133 LiptonReduction]: Total number of compositions: 122 [2021-10-04 18:52:37,528 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 22 transitions, 60 flow [2021-10-04 18:52:37,549 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 36 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2021-10-04 18:52:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2021-10-04 18:52:37,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:52:37,561 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:37,562 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:37,563 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:37,575 INFO L82 PathProgramCache]: Analyzing trace with hash 724835, now seen corresponding path program 1 times [2021-10-04 18:52:37,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:37,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411236849] [2021-10-04 18:52:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:37,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:37,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:37,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411236849] [2021-10-04 18:52:37,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411236849] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:37,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:52:37,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-04 18:52:37,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369520776] [2021-10-04 18:52:37,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-04 18:52:37,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:37,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-04 18:52:37,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-04 18:52:37,954 INFO L87 Difference]: Start difference. First operand has 36 states, 35 states have (on average 2.2) internal successors, (77), 35 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) Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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) [2021-10-04 18:52:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:37,985 INFO L93 Difference]: Finished difference Result 63 states and 138 transitions. [2021-10-04 18:52:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-04 18:52:37,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 15 [2021-10-04 18:52:37,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:37,997 INFO L225 Difference]: With dead ends: 63 [2021-10-04 18:52:37,997 INFO L226 Difference]: Without dead ends: 58 [2021-10-04 18:52:37,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-04 18:52:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-04 18:52:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-04 18:52:38,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.245614035087719) internal successors, (128), 57 states have internal predecessors, (128), 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) [2021-10-04 18:52:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 128 transitions. [2021-10-04 18:52:38,042 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 128 transitions. Word has length 15 [2021-10-04 18:52:38,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:38,044 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 128 transitions. [2021-10-04 18:52:38,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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) [2021-10-04 18:52:38,044 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 128 transitions. [2021-10-04 18:52:38,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:52:38,046 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:38,046 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:38,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-04 18:52:38,046 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:38,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:38,047 INFO L82 PathProgramCache]: Analyzing trace with hash -502236017, now seen corresponding path program 1 times [2021-10-04 18:52:38,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:38,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565166180] [2021-10-04 18:52:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:38,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:38,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:38,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565166180] [2021-10-04 18:52:38,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565166180] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:38,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:52:38,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-04 18:52:38,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088137892] [2021-10-04 18:52:38,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-04 18:52:38,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:38,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-04 18:52:38,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-04 18:52:38,224 INFO L87 Difference]: Start difference. First operand 58 states and 128 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-10-04 18:52:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:38,271 INFO L93 Difference]: Finished difference Result 94 states and 203 transitions. [2021-10-04 18:52:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 18:52:38,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2021-10-04 18:52:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:38,274 INFO L225 Difference]: With dead ends: 94 [2021-10-04 18:52:38,274 INFO L226 Difference]: Without dead ends: 94 [2021-10-04 18:52:38,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-04 18:52:38,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-04 18:52:38,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 62. [2021-10-04 18:52:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.360655737704918) internal successors, (144), 61 states have internal predecessors, (144), 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) [2021-10-04 18:52:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 144 transitions. [2021-10-04 18:52:38,288 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 144 transitions. Word has length 16 [2021-10-04 18:52:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:38,288 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 144 transitions. [2021-10-04 18:52:38,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-10-04 18:52:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 144 transitions. [2021-10-04 18:52:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:52:38,291 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:38,291 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:38,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-04 18:52:38,291 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:38,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:38,292 INFO L82 PathProgramCache]: Analyzing trace with hash 385267664, now seen corresponding path program 1 times [2021-10-04 18:52:38,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:38,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408501834] [2021-10-04 18:52:38,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:38,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:38,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:38,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408501834] [2021-10-04 18:52:38,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408501834] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:38,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296044069] [2021-10-04 18:52:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:38,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:38,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:38,446 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) [2021-10-04 18:52:38,448 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 [2021-10-04 18:52:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:38,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-04 18:52:38,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:38,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296044069] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:38,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-04 18:52:38,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-10-04 18:52:38,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439009014] [2021-10-04 18:52:38,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 18:52:38,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:38,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 18:52:38,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-04 18:52:38,735 INFO L87 Difference]: Start difference. First operand 62 states and 144 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-10-04 18:52:38,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:38,793 INFO L93 Difference]: Finished difference Result 92 states and 196 transitions. [2021-10-04 18:52:38,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 18:52:38,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2021-10-04 18:52:38,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:38,799 INFO L225 Difference]: With dead ends: 92 [2021-10-04 18:52:38,799 INFO L226 Difference]: Without dead ends: 63 [2021-10-04 18:52:38,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-04 18:52:38,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-04 18:52:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-04 18:52:38,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.338709677419355) internal successors, (145), 62 states have internal predecessors, (145), 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) [2021-10-04 18:52:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 145 transitions. [2021-10-04 18:52:38,820 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 145 transitions. Word has length 16 [2021-10-04 18:52:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:38,820 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 145 transitions. [2021-10-04 18:52:38,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-10-04 18:52:38,823 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 145 transitions. [2021-10-04 18:52:38,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 18:52:38,824 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:38,824 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:38,882 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 [2021-10-04 18:52:39,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:39,025 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:39,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:39,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1553584414, now seen corresponding path program 1 times [2021-10-04 18:52:39,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:39,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509209993] [2021-10-04 18:52:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:39,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 18:52:39,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:39,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509209993] [2021-10-04 18:52:39,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509209993] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:39,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071436583] [2021-10-04 18:52:39,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:39,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:39,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:39,151 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) [2021-10-04 18:52:39,173 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 [2021-10-04 18:52:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:39,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-04 18:52:39,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 18:52:39,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071436583] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:39,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-04 18:52:39,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-04 18:52:39,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984604432] [2021-10-04 18:52:39,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 18:52:39,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:39,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 18:52:39,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-04 18:52:39,397 INFO L87 Difference]: Start difference. First operand 63 states and 145 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-10-04 18:52:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:39,448 INFO L93 Difference]: Finished difference Result 95 states and 200 transitions. [2021-10-04 18:52:39,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 18:52:39,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 17 [2021-10-04 18:52:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:39,453 INFO L225 Difference]: With dead ends: 95 [2021-10-04 18:52:39,454 INFO L226 Difference]: Without dead ends: 64 [2021-10-04 18:52:39,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-04 18:52:39,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-04 18:52:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-04 18:52:39,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 63 states have internal predecessors, (146), 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) [2021-10-04 18:52:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 146 transitions. [2021-10-04 18:52:39,477 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 146 transitions. Word has length 17 [2021-10-04 18:52:39,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:39,477 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 146 transitions. [2021-10-04 18:52:39,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-10-04 18:52:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 146 transitions. [2021-10-04 18:52:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-04 18:52:39,482 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:39,482 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:39,518 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 [2021-10-04 18:52:39,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:39,697 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:39,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1795547615, now seen corresponding path program 1 times [2021-10-04 18:52:39,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:39,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677045238] [2021-10-04 18:52:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:39,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 18:52:39,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:39,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677045238] [2021-10-04 18:52:39,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677045238] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:39,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663163984] [2021-10-04 18:52:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:39,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:39,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:39,809 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) [2021-10-04 18:52:39,832 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 [2021-10-04 18:52:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:39,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-04 18:52:39,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 18:52:39,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663163984] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:39,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:39,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-04 18:52:39,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265361803] [2021-10-04 18:52:39,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-04 18:52:39,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:39,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-04 18:52:39,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-04 18:52:39,999 INFO L87 Difference]: Start difference. First operand 64 states and 146 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2021-10-04 18:52:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:40,108 INFO L93 Difference]: Finished difference Result 126 states and 264 transitions. [2021-10-04 18:52:40,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-04 18:52:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 18 [2021-10-04 18:52:40,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:40,113 INFO L225 Difference]: With dead ends: 126 [2021-10-04 18:52:40,113 INFO L226 Difference]: Without dead ends: 126 [2021-10-04 18:52:40,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-04 18:52:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-04 18:52:40,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 68. [2021-10-04 18:52:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.417910447761194) internal successors, (162), 67 states have internal predecessors, (162), 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) [2021-10-04 18:52:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 162 transitions. [2021-10-04 18:52:40,137 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 162 transitions. Word has length 18 [2021-10-04 18:52:40,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:40,138 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 162 transitions. [2021-10-04 18:52:40,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2021-10-04 18:52:40,144 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 162 transitions. [2021-10-04 18:52:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-04 18:52:40,146 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:40,146 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:40,180 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 [2021-10-04 18:52:40,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:40,349 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:40,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:40,351 INFO L82 PathProgramCache]: Analyzing trace with hash 2138013320, now seen corresponding path program 1 times [2021-10-04 18:52:40,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:40,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119098509] [2021-10-04 18:52:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:40,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 18:52:40,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:40,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119098509] [2021-10-04 18:52:40,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119098509] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:40,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:52:40,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-04 18:52:40,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906543052] [2021-10-04 18:52:40,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-04 18:52:40,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:40,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-04 18:52:40,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-04 18:52:40,406 INFO L87 Difference]: Start difference. First operand 68 states and 162 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-04 18:52:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:40,442 INFO L93 Difference]: Finished difference Result 96 states and 210 transitions. [2021-10-04 18:52:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 18:52:40,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2021-10-04 18:52:40,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:40,445 INFO L225 Difference]: With dead ends: 96 [2021-10-04 18:52:40,445 INFO L226 Difference]: Without dead ends: 90 [2021-10-04 18:52:40,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-04 18:52:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-04 18:52:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2021-10-04 18:52:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 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) [2021-10-04 18:52:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 158 transitions. [2021-10-04 18:52:40,451 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 158 transitions. Word has length 18 [2021-10-04 18:52:40,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:40,452 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 158 transitions. [2021-10-04 18:52:40,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-04 18:52:40,453 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 158 transitions. [2021-10-04 18:52:40,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-04 18:52:40,454 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:40,454 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:40,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-04 18:52:40,454 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:40,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:40,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1364223559, now seen corresponding path program 2 times [2021-10-04 18:52:40,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:40,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006953558] [2021-10-04 18:52:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:40,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 18:52:40,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:40,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006953558] [2021-10-04 18:52:40,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006953558] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:40,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943838197] [2021-10-04 18:52:40,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 18:52:40,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:40,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:40,507 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) [2021-10-04 18:52:40,530 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 [2021-10-04 18:52:40,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:52:40,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:40,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-04 18:52:40,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 18:52:40,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943838197] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:40,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:40,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-04 18:52:40,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053241913] [2021-10-04 18:52:40,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-04 18:52:40,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:40,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-04 18:52:40,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-04 18:52:40,681 INFO L87 Difference]: Start difference. First operand 68 states and 158 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 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) [2021-10-04 18:52:40,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:40,739 INFO L93 Difference]: Finished difference Result 96 states and 214 transitions. [2021-10-04 18:52:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 18:52:40,740 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 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 18 [2021-10-04 18:52:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:40,741 INFO L225 Difference]: With dead ends: 96 [2021-10-04 18:52:40,741 INFO L226 Difference]: Without dead ends: 96 [2021-10-04 18:52:40,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-04 18:52:40,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-04 18:52:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2021-10-04 18:52:40,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.3728813559322033) internal successors, (140), 59 states have internal predecessors, (140), 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) [2021-10-04 18:52:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 140 transitions. [2021-10-04 18:52:40,747 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 140 transitions. Word has length 18 [2021-10-04 18:52:40,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:40,747 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 140 transitions. [2021-10-04 18:52:40,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 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) [2021-10-04 18:52:40,748 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 140 transitions. [2021-10-04 18:52:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-04 18:52:40,749 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:40,749 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:40,784 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 [2021-10-04 18:52:40,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:40,964 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:40,965 INFO L82 PathProgramCache]: Analyzing trace with hash -279318246, now seen corresponding path program 2 times [2021-10-04 18:52:40,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:40,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388535761] [2021-10-04 18:52:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:40,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 18:52:41,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:41,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388535761] [2021-10-04 18:52:41,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388535761] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:41,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:52:41,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-04 18:52:41,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495840579] [2021-10-04 18:52:41,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-04 18:52:41,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-04 18:52:41,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-04 18:52:41,015 INFO L87 Difference]: Start difference. First operand 60 states and 140 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-04 18:52:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:41,051 INFO L93 Difference]: Finished difference Result 88 states and 189 transitions. [2021-10-04 18:52:41,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 18:52:41,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2021-10-04 18:52:41,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:41,052 INFO L225 Difference]: With dead ends: 88 [2021-10-04 18:52:41,052 INFO L226 Difference]: Without dead ends: 78 [2021-10-04 18:52:41,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-04 18:52:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-04 18:52:41,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-10-04 18:52:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.305084745762712) internal successors, (136), 59 states have internal predecessors, (136), 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) [2021-10-04 18:52:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 136 transitions. [2021-10-04 18:52:41,057 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 136 transitions. Word has length 18 [2021-10-04 18:52:41,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:41,057 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 136 transitions. [2021-10-04 18:52:41,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-04 18:52:41,057 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 136 transitions. [2021-10-04 18:52:41,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-04 18:52:41,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:41,058 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:41,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-04 18:52:41,059 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:41,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:41,059 INFO L82 PathProgramCache]: Analyzing trace with hash 872879606, now seen corresponding path program 3 times [2021-10-04 18:52:41,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:41,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186624434] [2021-10-04 18:52:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:41,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 18:52:41,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:41,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186624434] [2021-10-04 18:52:41,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186624434] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:41,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:52:41,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-04 18:52:41,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050989183] [2021-10-04 18:52:41,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-04 18:52:41,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:41,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-04 18:52:41,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-04 18:52:41,115 INFO L87 Difference]: Start difference. First operand 60 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-04 18:52:41,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:41,158 INFO L93 Difference]: Finished difference Result 94 states and 202 transitions. [2021-10-04 18:52:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 18:52:41,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2021-10-04 18:52:41,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:41,159 INFO L225 Difference]: With dead ends: 94 [2021-10-04 18:52:41,159 INFO L226 Difference]: Without dead ends: 94 [2021-10-04 18:52:41,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-04 18:52:41,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-04 18:52:41,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 60. [2021-10-04 18:52:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.305084745762712) internal successors, (136), 59 states have internal predecessors, (136), 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) [2021-10-04 18:52:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 136 transitions. [2021-10-04 18:52:41,163 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 136 transitions. Word has length 18 [2021-10-04 18:52:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:41,164 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 136 transitions. [2021-10-04 18:52:41,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-04 18:52:41,164 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 136 transitions. [2021-10-04 18:52:41,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-04 18:52:41,165 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:41,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:41,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-04 18:52:41,165 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:41,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:41,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1760383287, now seen corresponding path program 3 times [2021-10-04 18:52:41,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:41,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109027380] [2021-10-04 18:52:41,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:41,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 18:52:41,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:41,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109027380] [2021-10-04 18:52:41,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109027380] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:41,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069601862] [2021-10-04 18:52:41,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 18:52:41,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:41,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:41,213 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) [2021-10-04 18:52:41,222 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 [2021-10-04 18:52:41,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-04 18:52:41,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:41,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-04 18:52:41,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 18:52:41,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069601862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:41,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:41,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-04 18:52:41,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472858679] [2021-10-04 18:52:41,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-04 18:52:41,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:41,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-04 18:52:41,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-04 18:52:41,403 INFO L87 Difference]: Start difference. First operand 60 states and 136 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2021-10-04 18:52:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:41,455 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2021-10-04 18:52:41,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 18:52:41,456 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 18 [2021-10-04 18:52:41,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:41,457 INFO L225 Difference]: With dead ends: 80 [2021-10-04 18:52:41,457 INFO L226 Difference]: Without dead ends: 80 [2021-10-04 18:52:41,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-04 18:52:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-04 18:52:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-10-04 18:52:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.305084745762712) internal successors, (136), 59 states have internal predecessors, (136), 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) [2021-10-04 18:52:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 136 transitions. [2021-10-04 18:52:41,462 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 136 transitions. Word has length 18 [2021-10-04 18:52:41,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:41,462 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 136 transitions. [2021-10-04 18:52:41,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2021-10-04 18:52:41,462 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 136 transitions. [2021-10-04 18:52:41,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-04 18:52:41,463 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:41,463 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:41,507 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 [2021-10-04 18:52:41,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:41,677 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:41,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:41,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1398976926, now seen corresponding path program 4 times [2021-10-04 18:52:41,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:41,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567066049] [2021-10-04 18:52:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:41,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 18:52:41,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:41,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567066049] [2021-10-04 18:52:41,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567066049] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:41,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:52:41,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-04 18:52:41,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899689588] [2021-10-04 18:52:41,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-04 18:52:41,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:41,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-04 18:52:41,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-04 18:52:41,728 INFO L87 Difference]: Start difference. First operand 60 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-04 18:52:41,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:41,765 INFO L93 Difference]: Finished difference Result 66 states and 140 transitions. [2021-10-04 18:52:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-04 18:52:41,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2021-10-04 18:52:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:41,767 INFO L225 Difference]: With dead ends: 66 [2021-10-04 18:52:41,767 INFO L226 Difference]: Without dead ends: 58 [2021-10-04 18:52:41,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-04 18:52:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-04 18:52:41,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-10-04 18:52:41,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 55 states have internal predecessors, (122), 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) [2021-10-04 18:52:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 122 transitions. [2021-10-04 18:52:41,771 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 122 transitions. Word has length 18 [2021-10-04 18:52:41,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:41,771 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 122 transitions. [2021-10-04 18:52:41,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-04 18:52:41,772 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 122 transitions. [2021-10-04 18:52:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-04 18:52:41,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:41,773 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:41,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-04 18:52:41,773 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:41,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:41,774 INFO L82 PathProgramCache]: Analyzing trace with hash -443277698, now seen corresponding path program 5 times [2021-10-04 18:52:41,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:41,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981059270] [2021-10-04 18:52:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:41,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 18:52:41,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:41,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981059270] [2021-10-04 18:52:41,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981059270] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:41,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:52:41,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-04 18:52:41,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57611565] [2021-10-04 18:52:41,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-04 18:52:41,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:41,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-04 18:52:41,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-04 18:52:41,820 INFO L87 Difference]: Start difference. First operand 56 states and 122 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-04 18:52:41,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:41,867 INFO L93 Difference]: Finished difference Result 60 states and 132 transitions. [2021-10-04 18:52:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 18:52:41,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2021-10-04 18:52:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:41,868 INFO L225 Difference]: With dead ends: 60 [2021-10-04 18:52:41,869 INFO L226 Difference]: Without dead ends: 60 [2021-10-04 18:52:41,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-04 18:52:41,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-04 18:52:41,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-10-04 18:52:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 55 states have internal predecessors, (122), 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) [2021-10-04 18:52:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 122 transitions. [2021-10-04 18:52:41,872 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 122 transitions. Word has length 18 [2021-10-04 18:52:41,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:41,873 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 122 transitions. [2021-10-04 18:52:41,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-04 18:52:41,873 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 122 transitions. [2021-10-04 18:52:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-04 18:52:41,874 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:41,874 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:41,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-04 18:52:41,875 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:41,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1207413773, now seen corresponding path program 1 times [2021-10-04 18:52:41,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:41,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725070671] [2021-10-04 18:52:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:41,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 18:52:41,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:41,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725070671] [2021-10-04 18:52:41,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725070671] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:41,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154549629] [2021-10-04 18:52:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:41,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:41,968 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) [2021-10-04 18:52:41,992 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 [2021-10-04 18:52:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:42,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-04 18:52:42,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:42,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 10 [2021-10-04 18:52:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 18:52:42,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154549629] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:42,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:42,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-10-04 18:52:42,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663369764] [2021-10-04 18:52:42,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-04 18:52:42,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:42,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-04 18:52:42,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-04 18:52:42,193 INFO L87 Difference]: Start difference. First operand 56 states and 122 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 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) [2021-10-04 18:52:42,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:42,254 INFO L93 Difference]: Finished difference Result 107 states and 238 transitions. [2021-10-04 18:52:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-04 18:52:42,255 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 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 [2021-10-04 18:52:42,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:42,256 INFO L225 Difference]: With dead ends: 107 [2021-10-04 18:52:42,256 INFO L226 Difference]: Without dead ends: 57 [2021-10-04 18:52:42,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-04 18:52:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-04 18:52:42,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-04 18:52:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 56 states have internal predecessors, (123), 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) [2021-10-04 18:52:42,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 123 transitions. [2021-10-04 18:52:42,260 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 123 transitions. Word has length 19 [2021-10-04 18:52:42,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:42,260 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 123 transitions. [2021-10-04 18:52:42,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 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) [2021-10-04 18:52:42,261 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 123 transitions. [2021-10-04 18:52:42,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-04 18:52:42,261 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:42,262 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:42,296 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 [2021-10-04 18:52:42,474 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,SelfDestructingSolverStorable12 [2021-10-04 18:52:42,475 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2115931805, now seen corresponding path program 2 times [2021-10-04 18:52:42,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:42,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117843031] [2021-10-04 18:52:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:42,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 18:52:42,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:42,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117843031] [2021-10-04 18:52:42,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117843031] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:42,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091569657] [2021-10-04 18:52:42,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 18:52:42,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:42,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:42,677 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) [2021-10-04 18:52:42,695 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 [2021-10-04 18:52:42,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:52:42,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:42,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-04 18:52:42,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:43,154 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-04 18:52:43,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 24 [2021-10-04 18:52:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:43,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091569657] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:43,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:43,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2021-10-04 18:52:43,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662035363] [2021-10-04 18:52:43,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 18:52:43,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:43,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 18:52:43,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-04 18:52:43,178 INFO L87 Difference]: Start difference. First operand 57 states and 123 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) [2021-10-04 18:52:43,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:43,485 INFO L93 Difference]: Finished difference Result 266 states and 595 transitions. [2021-10-04 18:52:43,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 18:52:43,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 20 [2021-10-04 18:52:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:43,487 INFO L225 Difference]: With dead ends: 266 [2021-10-04 18:52:43,487 INFO L226 Difference]: Without dead ends: 132 [2021-10-04 18:52:43,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-10-04 18:52:43,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-04 18:52:43,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2021-10-04 18:52:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 88 states have internal predecessors, (181), 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) [2021-10-04 18:52:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 181 transitions. [2021-10-04 18:52:43,493 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 181 transitions. Word has length 20 [2021-10-04 18:52:43,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:43,493 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 181 transitions. [2021-10-04 18:52:43,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) [2021-10-04 18:52:43,494 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 181 transitions. [2021-10-04 18:52:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-04 18:52:43,494 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:43,495 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:43,542 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 [2021-10-04 18:52:43,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-04 18:52:43,706 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:43,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:43,707 INFO L82 PathProgramCache]: Analyzing trace with hash -374077845, now seen corresponding path program 3 times [2021-10-04 18:52:43,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:43,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677579209] [2021-10-04 18:52:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:43,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 18:52:43,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:43,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677579209] [2021-10-04 18:52:43,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677579209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:43,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500634304] [2021-10-04 18:52:43,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 18:52:43,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:43,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:43,937 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) [2021-10-04 18:52:43,946 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 [2021-10-04 18:52:44,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-04 18:52:44,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:44,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-04 18:52:44,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:44,092 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 31 treesize of output 29 [2021-10-04 18:52:44,350 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-04 18:52:44,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-10-04 18:52:44,449 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-04 18:52:44,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 26 [2021-10-04 18:52:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:44,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500634304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:44,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:44,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 14 [2021-10-04 18:52:44,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096448759] [2021-10-04 18:52:44,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:52:44,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:44,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:52:44,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:52:44,474 INFO L87 Difference]: Start difference. First operand 89 states and 181 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 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) [2021-10-04 18:52:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:44,930 INFO L93 Difference]: Finished difference Result 202 states and 423 transitions. [2021-10-04 18:52:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-04 18:52:44,930 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 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 20 [2021-10-04 18:52:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:44,931 INFO L225 Difference]: With dead ends: 202 [2021-10-04 18:52:44,931 INFO L226 Difference]: Without dead ends: 58 [2021-10-04 18:52:44,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 467.5ms TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-10-04 18:52:44,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-04 18:52:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-04 18:52:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.175438596491228) internal successors, (124), 57 states have internal predecessors, (124), 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) [2021-10-04 18:52:44,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 124 transitions. [2021-10-04 18:52:44,935 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 124 transitions. Word has length 20 [2021-10-04 18:52:44,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:44,935 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 124 transitions. [2021-10-04 18:52:44,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 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) [2021-10-04 18:52:44,935 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 124 transitions. [2021-10-04 18:52:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 18:52:44,936 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:44,936 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:44,975 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 [2021-10-04 18:52:45,146 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,SelfDestructingSolverStorable14 [2021-10-04 18:52:45,147 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:45,148 INFO L82 PathProgramCache]: Analyzing trace with hash 808437188, now seen corresponding path program 4 times [2021-10-04 18:52:45,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:45,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14545461] [2021-10-04 18:52:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:45,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:45,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:45,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14545461] [2021-10-04 18:52:45,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14545461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:45,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237455827] [2021-10-04 18:52:45,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 18:52:45,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:45,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:45,632 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) [2021-10-04 18:52:45,656 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 [2021-10-04 18:52:45,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 18:52:45,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:45,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-04 18:52:45,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:46,278 INFO L354 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2021-10-04 18:52:46,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 56 [2021-10-04 18:52:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 18:52:46,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237455827] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:46,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:46,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2021-10-04 18:52:46,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194355292] [2021-10-04 18:52:46,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-04 18:52:46,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:46,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-04 18:52:46,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-10-04 18:52:46,362 INFO L87 Difference]: Start difference. First operand 58 states and 124 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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) [2021-10-04 18:52:46,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:46,613 INFO L93 Difference]: Finished difference Result 147 states and 326 transitions. [2021-10-04 18:52:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-04 18:52:46,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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 [2021-10-04 18:52:46,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:46,615 INFO L225 Difference]: With dead ends: 147 [2021-10-04 18:52:46,616 INFO L226 Difference]: Without dead ends: 142 [2021-10-04 18:52:46,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-10-04 18:52:46,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-04 18:52:46,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2021-10-04 18:52:46,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.34375) internal successors, (300), 128 states have internal predecessors, (300), 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) [2021-10-04 18:52:46,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 300 transitions. [2021-10-04 18:52:46,622 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 300 transitions. Word has length 21 [2021-10-04 18:52:46,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:46,622 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 300 transitions. [2021-10-04 18:52:46,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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) [2021-10-04 18:52:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 300 transitions. [2021-10-04 18:52:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 18:52:46,623 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:46,623 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:46,660 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 [2021-10-04 18:52:46,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:46,825 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:46,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:46,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1744676148, now seen corresponding path program 5 times [2021-10-04 18:52:46,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:46,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324072741] [2021-10-04 18:52:46,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:46,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:47,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:47,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324072741] [2021-10-04 18:52:47,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324072741] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:47,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340261498] [2021-10-04 18:52:47,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 18:52:47,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:47,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:47,525 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) [2021-10-04 18:52:47,548 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 [2021-10-04 18:52:47,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:52:47,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:47,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-04 18:52:47,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:47,795 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-10-04 18:52:47,796 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 3 case distinctions, treesize of input 116 treesize of output 123 [2021-10-04 18:52:48,349 INFO L354 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2021-10-04 18:52:48,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 40 treesize of output 66 [2021-10-04 18:52:48,857 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-04 18:52:48,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 59 [2021-10-04 18:52:49,103 INFO L354 Elim1Store]: treesize reduction 60, result has 27.7 percent of original size [2021-10-04 18:52:49,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 66 [2021-10-04 18:52:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:49,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340261498] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:49,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:49,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-04 18:52:49,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068188167] [2021-10-04 18:52:49,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-04 18:52:49,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:49,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-04 18:52:49,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-10-04 18:52:49,180 INFO L87 Difference]: Start difference. First operand 129 states and 300 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 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) [2021-10-04 18:52:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:50,270 INFO L93 Difference]: Finished difference Result 367 states and 853 transitions. [2021-10-04 18:52:50,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-04 18:52:50,271 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 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 [2021-10-04 18:52:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:50,276 INFO L225 Difference]: With dead ends: 367 [2021-10-04 18:52:50,276 INFO L226 Difference]: Without dead ends: 357 [2021-10-04 18:52:50,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1289.5ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-10-04 18:52:50,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-10-04 18:52:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 164. [2021-10-04 18:52:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.294478527607362) internal successors, (374), 163 states have internal predecessors, (374), 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) [2021-10-04 18:52:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 374 transitions. [2021-10-04 18:52:50,286 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 374 transitions. Word has length 21 [2021-10-04 18:52:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:50,287 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 374 transitions. [2021-10-04 18:52:50,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 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) [2021-10-04 18:52:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 374 transitions. [2021-10-04 18:52:50,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-04 18:52:50,288 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:50,288 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:50,322 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 [2021-10-04 18:52:50,503 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,SelfDestructingSolverStorable16 [2021-10-04 18:52:50,504 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:50,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:50,505 INFO L82 PathProgramCache]: Analyzing trace with hash 245905842, now seen corresponding path program 6 times [2021-10-04 18:52:50,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:50,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797639700] [2021-10-04 18:52:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:50,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-04 18:52:50,556 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-04 18:52:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-04 18:52:50,621 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-04 18:52:50,621 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-04 18:52:50,622 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-04 18:52:50,624 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-04 18:52:50,624 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-04 18:52:50,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-04 18:52:50,632 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-04 18:52:50,632 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-04 18:52:50,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 06:52:50 BasicIcfg [2021-10-04 18:52:50,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-04 18:52:50,686 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-04 18:52:50,686 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-04 18:52:50,686 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-04 18:52:50,687 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 06:52:32" (3/4) ... [2021-10-04 18:52:50,689 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-04 18:52:50,752 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-04 18:52:50,752 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-04 18:52:50,754 INFO L168 Benchmark]: Toolchain (without parser) took 20146.95 ms. Allocated memory was 44.0 MB in the beginning and 174.1 MB in the end (delta: 130.0 MB). Free memory was 20.6 MB in the beginning and 64.1 MB in the end (delta: -43.5 MB). Peak memory consumption was 87.7 MB. Max. memory is 16.1 GB. [2021-10-04 18:52:50,754 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 44.0 MB. Free memory is still 27.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-04 18:52:50,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.78 ms. Allocated memory is still 44.0 MB. Free memory was 20.3 MB in the beginning and 21.0 MB in the end (delta: -753.8 kB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2021-10-04 18:52:50,755 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.71 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.9 MB in the beginning and 39.0 MB in the end (delta: -18.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2021-10-04 18:52:50,755 INFO L168 Benchmark]: Boogie Preprocessor took 38.86 ms. Allocated memory is still 54.5 MB. Free memory was 39.0 MB in the beginning and 37.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-04 18:52:50,756 INFO L168 Benchmark]: RCFGBuilder took 1159.07 ms. Allocated memory is still 54.5 MB. Free memory was 37.3 MB in the beginning and 35.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. [2021-10-04 18:52:50,756 INFO L168 Benchmark]: TraceAbstraction took 18493.45 ms. Allocated memory was 54.5 MB in the beginning and 174.1 MB in the end (delta: 119.5 MB). Free memory was 34.7 MB in the beginning and 70.4 MB in the end (delta: -35.7 MB). Peak memory consumption was 84.8 MB. Max. memory is 16.1 GB. [2021-10-04 18:52:50,757 INFO L168 Benchmark]: Witness Printer took 66.93 ms. Allocated memory is still 174.1 MB. Free memory was 70.4 MB in the beginning and 64.1 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-04 18:52:50,759 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 44.0 MB. Free memory is still 27.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 316.78 ms. Allocated memory is still 44.0 MB. Free memory was 20.3 MB in the beginning and 21.0 MB in the end (delta: -753.8 kB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.71 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.9 MB in the beginning and 39.0 MB in the end (delta: -18.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.86 ms. Allocated memory is still 54.5 MB. Free memory was 39.0 MB in the beginning and 37.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1159.07 ms. Allocated memory is still 54.5 MB. Free memory was 37.3 MB in the beginning and 35.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18493.45 ms. Allocated memory was 54.5 MB in the beginning and 174.1 MB in the end (delta: 119.5 MB). Free memory was 34.7 MB in the beginning and 70.4 MB in the end (delta: -35.7 MB). Peak memory consumption was 84.8 MB. Max. memory is 16.1 GB. * Witness Printer took 66.93 ms. Allocated memory is still 174.1 MB. Free memory was 70.4 MB in the beginning and 64.1 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5059.5ms, 122 PlacesBefore, 25 PlacesAfterwards, 126 TransitionsBefore, 22 TransitionsAfterwards, 432 CoEnabledTransitionPairs, 7 FixpointIterations, 85 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 4 ConcurrentYvCompositions, 7 ChoiceCompositions, 122 TotalNumberOfCompositions, 501 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 472, positive: 456, positive conditional: 0, positive unconditional: 456, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 277, positive: 272, positive conditional: 0, positive unconditional: 272, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 277, positive: 269, positive conditional: 0, positive unconditional: 269, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 99, positive: 67, positive conditional: 0, positive unconditional: 67, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 472, positive: 184, positive conditional: 0, positive unconditional: 184, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 277, unknown conditional: 0, unknown unconditional: 277] , Statistics on independence cache: Total cache size (in pairs): 26, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - 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 - CounterExampleResult [Line: 60]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] 0 int *f, *f_inv; [L18] 0 int counter, N, n, n_inv; [L45] 0 pthread_t t1, t2; [L47] 0 N = __VERIFIER_nondet_int() [L48] 0 n = __VERIFIER_nondet_int() [L49] 0 n_inv = __VERIFIER_nondet_int() [L14] COND FALSE 0 !(!cond) [L66] 0 int* arr = (int*)malloc(sizeof(int) * size); [L67] 0 int i = 0; VAL [counter=0, f={0:0}, f={0:0}, N=1, n=3, n=2] [L67] COND TRUE 0 i < size [L68] 0 arr[i] = __VERIFIER_nondet_int() [L67] 0 i++ VAL [counter=0, f={0:0}, f={0:0}, n=2, N=1, n=3] [L67] COND TRUE 0 i < size [L68] 0 arr[i] = __VERIFIER_nondet_int() [L67] 0 i++ VAL [counter=0, f={0:0}, f={0:0}, n=2, n=3, N=1] [L67] COND FALSE 0 !(i < size) [L70] 0 return arr; [L50] 0 f = create_fresh_int_array(n) [L14] COND FALSE 0 !(!cond) [L66] 0 int* arr = (int*)malloc(sizeof(int) * size); [L67] 0 int i = 0; VAL [counter=0, f={3:0}, f={0:0}, N=1, n=2, n=3] [L67] COND TRUE 0 i < size [L68] 0 arr[i] = __VERIFIER_nondet_int() [L67] 0 i++ VAL [counter=0, f={0:0}, f={3:0}, n=2, n=3, N=1] [L67] COND TRUE 0 i < size [L68] 0 arr[i] = __VERIFIER_nondet_int() [L67] 0 i++ VAL [counter=0, f={3:0}, f={0:0}, N=1, n=2, n=3] [L67] COND TRUE 0 i < size [L68] 0 arr[i] = __VERIFIER_nondet_int() [L67] 0 i++ VAL [counter=0, f={0:0}, f={3:0}, n=2, N=1, n=3] [L67] COND FALSE 0 !(i < size) [L70] 0 return arr; [L51] 0 f_inv = create_fresh_int_array(n_inv) [L54] FCALL, FORK 0 pthread_create(&t1, NULL, thread1, NULL) VAL [counter=0, f={11:0}, f={3:0}, n=3, n=2, N=1] [L23] 1 int i=0; VAL [counter=0, f={3:0}, f={11:0}, n=3, N=1, n=2] [L55] FCALL, FORK 0 pthread_create(&t2, NULL, thread2, NULL) VAL [counter=0, f={11:0}, f={3:0}, N=1, n=3, n=2] [L56] 0 \read(t1) VAL [counter=0, f={11:0}, f={3:0}, n=2, n=3, N=1] [L34] 2 int i=0; VAL [counter=0, f={3:0}, f={11:0}, N=1, n=2, n=3] [L34] COND TRUE 2 i= 0 && f[counter] < n_inv [L37] EXPR 2 f[counter] [L37] 2 f[counter] >= 0 && f[counter] < n_inv [L14] COND FALSE 2 !(!cond) [L38] EXPR 2 f[counter] [L38] 2 f_inv[f[counter]] [L14] COND FALSE 2 !(!cond) [L39] EXPR 2 f[counter] [L39] 2 counter = f[counter] [L34] 2 i++ VAL [counter=1, f={11:0}, f={3:0}, n=2, N=1, n=3] [L23] COND TRUE 1 i= 0 && f[counter] < n_inv [L26] EXPR 1 f[counter] [L26] 1 f[counter] >= 0 && f[counter] < n_inv [L14] COND FALSE 1 !(!cond) [L27] EXPR 1 f[counter] [L27] 1 f_inv[f[counter]] [L14] COND FALSE 1 !(!cond) [L28] EXPR 1 f[counter] [L28] 1 counter = f[counter] [L23] 1 i++ VAL [counter=2, f={11:0}, f={3:0}, n=2, N=1, n=3] [L23] COND FALSE 1 !(i