/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 14:36:06,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 14:36:06,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 14:36:06,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 14:36:06,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 14:36:06,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 14:36:06,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 14:36:06,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 14:36:06,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 14:36:06,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 14:36:06,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 14:36:06,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 14:36:06,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 14:36:06,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 14:36:06,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 14:36:06,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 14:36:06,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 14:36:06,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 14:36:06,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 14:36:06,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 14:36:06,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 14:36:06,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 14:36:06,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 14:36:06,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 14:36:06,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 14:36:06,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 14:36:06,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 14:36:06,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 14:36:06,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 14:36:06,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-10 14:36:06,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 14:36:06,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 14:36:06,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 14:36:06,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 14:36:06,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 14:36:06,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 14:36:06,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 14:36:06,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 14:36:06,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 14:36:06,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 14:36:06,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 14:36:06,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 14:36:06,857 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 14:36:06,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 14:36:06,858 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 14:36:06,858 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 14:36:06,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 14:36:06,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 14:36:06,860 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 14:36:06,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 14:36:06,861 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 14:36:06,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 14:36:06,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 14:36:06,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 14:36:06,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 14:36:06,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 14:36:06,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 14:36:06,862 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 14:36:06,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 14:36:06,862 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 14:36:06,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 14:36:06,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 14:36:06,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 14:36:06,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 14:36:06,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 14:36:06,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 14:36:06,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 14:36:06,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 14:36:06,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 14:36:06,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 14:36:06,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 14:36:06,863 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 14:36:06,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 14:36:06,863 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 14:36:07,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 14:36:07,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 14:36:07,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 14:36:07,110 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-10 14:36:07,110 INFO L275 PluginConnector]: CDTParser initialized [2021-03-10 14:36:07,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2021-03-10 14:36:07,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/362274650/0f0cd14167bb41f694d4ae454b790e2d/FLAGab6c49fcb [2021-03-10 14:36:07,532 INFO L306 CDTParser]: Found 1 translation units. [2021-03-10 14:36:07,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2021-03-10 14:36:07,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/362274650/0f0cd14167bb41f694d4ae454b790e2d/FLAGab6c49fcb [2021-03-10 14:36:07,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/362274650/0f0cd14167bb41f694d4ae454b790e2d [2021-03-10 14:36:07,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 14:36:07,920 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-10 14:36:07,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-10 14:36:07,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-10 14:36:07,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-10 14:36:07,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 02:36:07" (1/1) ... [2021-03-10 14:36:07,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34cebd5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:07, skipping insertion in model container [2021-03-10 14:36:07,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 02:36:07" (1/1) ... [2021-03-10 14:36:07,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-10 14:36:07,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-10 14:36:08,147 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i[30920,30933] [2021-03-10 14:36:08,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 14:36:08,155 INFO L203 MainTranslator]: Completed pre-run [2021-03-10 14:36:08,189 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i[30920,30933] [2021-03-10 14:36:08,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 14:36:08,233 INFO L208 MainTranslator]: Completed translation [2021-03-10 14:36:08,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08 WrapperNode [2021-03-10 14:36:08,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-10 14:36:08,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 14:36:08,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 14:36:08,234 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 14:36:08,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 14:36:08,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 14:36:08,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 14:36:08,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 14:36:08,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 14:36:08,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 14:36:08,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 14:36:08,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 14:36:08,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 14:36:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-03-10 14:36:08,332 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-03-10 14:36:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-03-10 14:36:08,332 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-03-10 14:36:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-10 14:36:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-10 14:36:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-10 14:36:08,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-10 14:36:08,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-10 14:36:08,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-10 14:36:08,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 14:36:08,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 14:36:08,334 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 14:36:08,582 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 14:36:08,582 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-03-10 14:36:08,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 02:36:08 BoogieIcfgContainer [2021-03-10 14:36:08,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 14:36:08,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 14:36:08,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 14:36:08,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 14:36:08,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.03 02:36:07" (1/3) ... [2021-03-10 14:36:08,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c2a2c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 02:36:08, skipping insertion in model container [2021-03-10 14:36:08,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (2/3) ... [2021-03-10 14:36:08,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c2a2c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 02:36:08, skipping insertion in model container [2021-03-10 14:36:08,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 02:36:08" (3/3) ... [2021-03-10 14:36:08,588 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2021-03-10 14:36:08,592 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 14:36:08,592 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 14:36:08,595 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 14:36:08,595 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 14:36:08,619 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,620 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,620 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,620 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,620 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,620 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,620 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,620 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,621 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,621 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,621 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,621 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,621 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,622 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,622 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,622 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,623 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,623 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,623 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,623 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,623 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,623 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,623 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,623 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,624 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,624 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,624 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,624 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,624 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,624 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,625 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,625 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,625 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,625 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,626 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,626 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,626 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,626 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,626 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,626 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,626 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,626 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,627 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,627 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,627 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,627 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,627 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,627 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,627 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,627 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,628 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,628 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,628 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,628 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,628 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,628 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,628 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,628 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,630 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,630 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,631 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,631 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,632 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,632 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,632 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,632 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,636 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,636 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,636 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,636 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,636 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,637 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:08,638 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 14:36:08,649 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 14:36:08,670 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 14:36:08,670 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 14:36:08,670 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 14:36:08,670 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 14:36:08,670 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 14:36:08,671 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 14:36:08,671 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 14:36:08,671 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 14:36:08,679 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 62 transitions, 134 flow [2021-03-10 14:36:08,750 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1866 states, 1864 states have (on average 3.1448497854077253) internal successors, (5862), 1865 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:08,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 1866 states, 1864 states have (on average 3.1448497854077253) internal successors, (5862), 1865 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:08,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 14:36:08,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:08,774 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:08,774 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:08,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:08,778 INFO L82 PathProgramCache]: Analyzing trace with hash -80803440, now seen corresponding path program 1 times [2021-03-10 14:36:08,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:08,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781730720] [2021-03-10 14:36:08,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:09,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781730720] [2021-03-10 14:36:09,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:09,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 14:36:09,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078439398] [2021-03-10 14:36:09,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 14:36:09,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:09,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 14:36:09,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 14:36:09,052 INFO L87 Difference]: Start difference. First operand has 1866 states, 1864 states have (on average 3.1448497854077253) internal successors, (5862), 1865 states have internal predecessors, (5862), 0 states have call successors, (0), 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 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:09,157 INFO L93 Difference]: Finished difference Result 3730 states and 10826 transitions. [2021-03-10 14:36:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 14:36:09,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 14:36:09,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:09,172 INFO L225 Difference]: With dead ends: 3730 [2021-03-10 14:36:09,172 INFO L226 Difference]: Without dead ends: 1168 [2021-03-10 14:36:09,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 14:36:09,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-03-10 14:36:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 903. [2021-03-10 14:36:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 2.7084257206208426) internal successors, (2443), 902 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2443 transitions. [2021-03-10 14:36:09,254 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2443 transitions. Word has length 26 [2021-03-10 14:36:09,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:09,254 INFO L480 AbstractCegarLoop]: Abstraction has 903 states and 2443 transitions. [2021-03-10 14:36:09,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2443 transitions. [2021-03-10 14:36:09,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 14:36:09,256 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:09,257 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:09,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 14:36:09,257 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:09,257 INFO L82 PathProgramCache]: Analyzing trace with hash 311820000, now seen corresponding path program 1 times [2021-03-10 14:36:09,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:09,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012130457] [2021-03-10 14:36:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:09,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012130457] [2021-03-10 14:36:09,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:09,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 14:36:09,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168287171] [2021-03-10 14:36:09,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 14:36:09,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:09,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 14:36:09,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 14:36:09,339 INFO L87 Difference]: Start difference. First operand 903 states and 2443 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:09,423 INFO L93 Difference]: Finished difference Result 1680 states and 4453 transitions. [2021-03-10 14:36:09,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 14:36:09,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 14:36:09,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:09,429 INFO L225 Difference]: With dead ends: 1680 [2021-03-10 14:36:09,429 INFO L226 Difference]: Without dead ends: 1422 [2021-03-10 14:36:09,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 14:36:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-03-10 14:36:09,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 998. [2021-03-10 14:36:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 2.7191574724172516) internal successors, (2711), 997 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2711 transitions. [2021-03-10 14:36:09,454 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2711 transitions. Word has length 31 [2021-03-10 14:36:09,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:09,455 INFO L480 AbstractCegarLoop]: Abstraction has 998 states and 2711 transitions. [2021-03-10 14:36:09,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:09,455 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2711 transitions. [2021-03-10 14:36:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 14:36:09,459 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:09,459 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:09,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 14:36:09,459 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:09,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:09,465 INFO L82 PathProgramCache]: Analyzing trace with hash 795910062, now seen corresponding path program 1 times [2021-03-10 14:36:09,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:09,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283023316] [2021-03-10 14:36:09,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:09,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283023316] [2021-03-10 14:36:09,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:09,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 14:36:09,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935473409] [2021-03-10 14:36:09,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 14:36:09,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:09,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 14:36:09,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 14:36:09,573 INFO L87 Difference]: Start difference. First operand 998 states and 2711 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:09,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:09,638 INFO L93 Difference]: Finished difference Result 1726 states and 4512 transitions. [2021-03-10 14:36:09,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 14:36:09,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 14:36:09,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:09,643 INFO L225 Difference]: With dead ends: 1726 [2021-03-10 14:36:09,643 INFO L226 Difference]: Without dead ends: 1422 [2021-03-10 14:36:09,644 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 14:36:09,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-03-10 14:36:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1101. [2021-03-10 14:36:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 2.6672727272727275) internal successors, (2934), 1100 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:09,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 2934 transitions. [2021-03-10 14:36:09,681 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 2934 transitions. Word has length 31 [2021-03-10 14:36:09,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:09,682 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 2934 transitions. [2021-03-10 14:36:09,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:09,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 2934 transitions. [2021-03-10 14:36:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 14:36:09,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:09,683 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:09,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 14:36:09,683 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:09,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:09,684 INFO L82 PathProgramCache]: Analyzing trace with hash 596317858, now seen corresponding path program 2 times [2021-03-10 14:36:09,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:09,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934093936] [2021-03-10 14:36:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:09,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934093936] [2021-03-10 14:36:09,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:09,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 14:36:09,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979424523] [2021-03-10 14:36:09,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 14:36:09,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:09,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 14:36:09,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 14:36:09,782 INFO L87 Difference]: Start difference. First operand 1101 states and 2934 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:09,852 INFO L93 Difference]: Finished difference Result 1918 states and 5024 transitions. [2021-03-10 14:36:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 14:36:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 14:36:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:09,857 INFO L225 Difference]: With dead ends: 1918 [2021-03-10 14:36:09,857 INFO L226 Difference]: Without dead ends: 1596 [2021-03-10 14:36:09,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 14:36:09,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-03-10 14:36:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1179. [2021-03-10 14:36:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 2.6816638370118846) internal successors, (3159), 1178 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 3159 transitions. [2021-03-10 14:36:09,885 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 3159 transitions. Word has length 31 [2021-03-10 14:36:09,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:09,886 INFO L480 AbstractCegarLoop]: Abstraction has 1179 states and 3159 transitions. [2021-03-10 14:36:09,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:09,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 3159 transitions. [2021-03-10 14:36:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:09,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:09,888 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:09,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 14:36:09,889 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:09,889 INFO L82 PathProgramCache]: Analyzing trace with hash -147815549, now seen corresponding path program 1 times [2021-03-10 14:36:09,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:09,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356898389] [2021-03-10 14:36:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:09,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356898389] [2021-03-10 14:36:09,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145868041] [2021-03-10 14:36:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:10,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 14:36:10,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:10,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:10,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 14:36:10,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213530926] [2021-03-10 14:36:10,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 14:36:10,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:10,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 14:36:10,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 14:36:10,264 INFO L87 Difference]: Start difference. First operand 1179 states and 3159 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:10,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:10,423 INFO L93 Difference]: Finished difference Result 2364 states and 6203 transitions. [2021-03-10 14:36:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 14:36:10,423 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 14:36:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:10,431 INFO L225 Difference]: With dead ends: 2364 [2021-03-10 14:36:10,431 INFO L226 Difference]: Without dead ends: 2000 [2021-03-10 14:36:10,431 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-03-10 14:36:10,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-03-10 14:36:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1369. [2021-03-10 14:36:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 2.7010233918128654) internal successors, (3695), 1368 states have internal predecessors, (3695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 3695 transitions. [2021-03-10 14:36:10,462 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 3695 transitions. Word has length 36 [2021-03-10 14:36:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:10,463 INFO L480 AbstractCegarLoop]: Abstraction has 1369 states and 3695 transitions. [2021-03-10 14:36:10,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 3695 transitions. [2021-03-10 14:36:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:10,464 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:10,464 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:10,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:10,676 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:10,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1671330910, now seen corresponding path program 1 times [2021-03-10 14:36:10,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:10,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117342107] [2021-03-10 14:36:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:10,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117342107] [2021-03-10 14:36:10,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:10,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 14:36:10,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818655004] [2021-03-10 14:36:10,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 14:36:10,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:10,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 14:36:10,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 14:36:10,750 INFO L87 Difference]: Start difference. First operand 1369 states and 3695 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-03-10 14:36:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:10,838 INFO L93 Difference]: Finished difference Result 2041 states and 5346 transitions. [2021-03-10 14:36:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 14:36:10,839 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 36 [2021-03-10 14:36:10,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:10,844 INFO L225 Difference]: With dead ends: 2041 [2021-03-10 14:36:10,844 INFO L226 Difference]: Without dead ends: 1889 [2021-03-10 14:36:10,844 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 14:36:10,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2021-03-10 14:36:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1433. [2021-03-10 14:36:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 2.685055865921788) internal successors, (3845), 1432 states have internal predecessors, (3845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 3845 transitions. [2021-03-10 14:36:10,872 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 3845 transitions. Word has length 36 [2021-03-10 14:36:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:10,873 INFO L480 AbstractCegarLoop]: Abstraction has 1433 states and 3845 transitions. [2021-03-10 14:36:10,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-03-10 14:36:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 3845 transitions. [2021-03-10 14:36:10,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:10,874 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:10,874 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:10,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 14:36:10,874 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:10,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1471738706, now seen corresponding path program 2 times [2021-03-10 14:36:10,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:10,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105922029] [2021-03-10 14:36:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:11,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105922029] [2021-03-10 14:36:11,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:11,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 14:36:11,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293458305] [2021-03-10 14:36:11,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 14:36:11,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:11,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 14:36:11,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 14:36:11,055 INFO L87 Difference]: Start difference. First operand 1433 states and 3845 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-03-10 14:36:11,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:11,183 INFO L93 Difference]: Finished difference Result 2336 states and 6145 transitions. [2021-03-10 14:36:11,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 14:36:11,183 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 36 [2021-03-10 14:36:11,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:11,189 INFO L225 Difference]: With dead ends: 2336 [2021-03-10 14:36:11,189 INFO L226 Difference]: Without dead ends: 2078 [2021-03-10 14:36:11,189 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 14:36:11,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-03-10 14:36:11,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1424. [2021-03-10 14:36:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.702740688685875) internal successors, (3846), 1423 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3846 transitions. [2021-03-10 14:36:11,213 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3846 transitions. Word has length 36 [2021-03-10 14:36:11,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:11,213 INFO L480 AbstractCegarLoop]: Abstraction has 1424 states and 3846 transitions. [2021-03-10 14:36:11,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-03-10 14:36:11,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3846 transitions. [2021-03-10 14:36:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:11,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:11,215 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:11,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 14:36:11,215 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:11,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:11,215 INFO L82 PathProgramCache]: Analyzing trace with hash 944534279, now seen corresponding path program 1 times [2021-03-10 14:36:11,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:11,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157373382] [2021-03-10 14:36:11,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:11,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157373382] [2021-03-10 14:36:11,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638269075] [2021-03-10 14:36:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:11,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 14:36:11,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:11,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:11,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 14:36:11,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564217708] [2021-03-10 14:36:11,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 14:36:11,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:11,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 14:36:11,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 14:36:11,667 INFO L87 Difference]: Start difference. First operand 1424 states and 3846 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:11,761 INFO L93 Difference]: Finished difference Result 2577 states and 6658 transitions. [2021-03-10 14:36:11,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 14:36:11,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 14:36:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:11,769 INFO L225 Difference]: With dead ends: 2577 [2021-03-10 14:36:11,769 INFO L226 Difference]: Without dead ends: 2097 [2021-03-10 14:36:11,770 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-03-10 14:36:11,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-03-10 14:36:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1548. [2021-03-10 14:36:11,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1547 states have (on average 2.654169360051713) internal successors, (4106), 1547 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 4106 transitions. [2021-03-10 14:36:11,797 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 4106 transitions. Word has length 36 [2021-03-10 14:36:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:11,797 INFO L480 AbstractCegarLoop]: Abstraction has 1548 states and 4106 transitions. [2021-03-10 14:36:11,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 4106 transitions. [2021-03-10 14:36:11,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:11,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:11,799 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:12,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:12,013 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:12,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:12,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1293056211, now seen corresponding path program 2 times [2021-03-10 14:36:12,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:12,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761711332] [2021-03-10 14:36:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:12,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761711332] [2021-03-10 14:36:12,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896445358] [2021-03-10 14:36:12,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:12,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:12,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:12,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 14:36:12,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:12,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:12,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 14:36:12,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732267209] [2021-03-10 14:36:12,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 14:36:12,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:12,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 14:36:12,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 14:36:12,273 INFO L87 Difference]: Start difference. First operand 1548 states and 4106 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:12,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:12,395 INFO L93 Difference]: Finished difference Result 2697 states and 6898 transitions. [2021-03-10 14:36:12,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 14:36:12,395 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 14:36:12,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:12,402 INFO L225 Difference]: With dead ends: 2697 [2021-03-10 14:36:12,402 INFO L226 Difference]: Without dead ends: 2217 [2021-03-10 14:36:12,403 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-03-10 14:36:12,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2021-03-10 14:36:12,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 1586. [2021-03-10 14:36:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 2.661198738170347) internal successors, (4218), 1585 states have internal predecessors, (4218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 4218 transitions. [2021-03-10 14:36:12,440 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 4218 transitions. Word has length 36 [2021-03-10 14:36:12,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:12,440 INFO L480 AbstractCegarLoop]: Abstraction has 1586 states and 4218 transitions. [2021-03-10 14:36:12,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:12,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 4218 transitions. [2021-03-10 14:36:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:12,442 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:12,442 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:12,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 14:36:12,657 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:12,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:12,657 INFO L82 PathProgramCache]: Analyzing trace with hash -607062791, now seen corresponding path program 3 times [2021-03-10 14:36:12,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:12,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114130732] [2021-03-10 14:36:12,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:12,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114130732] [2021-03-10 14:36:12,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070264818] [2021-03-10 14:36:12,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:12,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 14:36:12,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 14:36:12,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:12,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:12,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 14:36:12,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108441735] [2021-03-10 14:36:12,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 14:36:12,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:12,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 14:36:12,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 14:36:12,863 INFO L87 Difference]: Start difference. First operand 1586 states and 4218 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:12,965 INFO L93 Difference]: Finished difference Result 2489 states and 6482 transitions. [2021-03-10 14:36:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 14:36:12,966 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 14:36:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:12,982 INFO L225 Difference]: With dead ends: 2489 [2021-03-10 14:36:12,982 INFO L226 Difference]: Without dead ends: 2167 [2021-03-10 14:36:12,982 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-03-10 14:36:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-03-10 14:36:13,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1634. [2021-03-10 14:36:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 2.6656460502143293) internal successors, (4353), 1633 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:13,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 4353 transitions. [2021-03-10 14:36:13,008 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 4353 transitions. Word has length 36 [2021-03-10 14:36:13,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:13,008 INFO L480 AbstractCegarLoop]: Abstraction has 1634 states and 4353 transitions. [2021-03-10 14:36:13,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:13,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 4353 transitions. [2021-03-10 14:36:13,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:13,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:13,010 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:13,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:13,214 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:13,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1524865637, now seen corresponding path program 1 times [2021-03-10 14:36:13,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:13,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350378590] [2021-03-10 14:36:13,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:13,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350378590] [2021-03-10 14:36:13,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369024633] [2021-03-10 14:36:13,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:13,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:13,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:13,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:13,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 14:36:13,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085901593] [2021-03-10 14:36:13,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 14:36:13,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:13,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 14:36:13,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-10 14:36:13,522 INFO L87 Difference]: Start difference. First operand 1634 states and 4353 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:13,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:13,624 INFO L93 Difference]: Finished difference Result 2438 states and 6300 transitions. [2021-03-10 14:36:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 14:36:13,624 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 14:36:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:13,628 INFO L225 Difference]: With dead ends: 2438 [2021-03-10 14:36:13,628 INFO L226 Difference]: Without dead ends: 2286 [2021-03-10 14:36:13,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-03-10 14:36:13,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-03-10 14:36:13,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1698. [2021-03-10 14:36:13,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 2.6535061873895107) internal successors, (4503), 1697 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 4503 transitions. [2021-03-10 14:36:13,653 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 4503 transitions. Word has length 41 [2021-03-10 14:36:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:13,653 INFO L480 AbstractCegarLoop]: Abstraction has 1698 states and 4503 transitions. [2021-03-10 14:36:13,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 4503 transitions. [2021-03-10 14:36:13,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:13,657 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:13,657 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:13,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 14:36:13,871 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:13,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:13,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1724457841, now seen corresponding path program 2 times [2021-03-10 14:36:13,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:13,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844121118] [2021-03-10 14:36:13,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:13,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844121118] [2021-03-10 14:36:13,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800162434] [2021-03-10 14:36:13,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:13,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:13,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:13,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:13,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:14,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:14,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 14:36:14,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849942160] [2021-03-10 14:36:14,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 14:36:14,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:14,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 14:36:14,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 14:36:14,074 INFO L87 Difference]: Start difference. First operand 1698 states and 4503 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:14,255 INFO L93 Difference]: Finished difference Result 3060 states and 8023 transitions. [2021-03-10 14:36:14,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 14:36:14,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 14:36:14,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:14,259 INFO L225 Difference]: With dead ends: 3060 [2021-03-10 14:36:14,259 INFO L226 Difference]: Without dead ends: 2696 [2021-03-10 14:36:14,259 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-03-10 14:36:14,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-03-10 14:36:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 1691. [2021-03-10 14:36:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 2.6857988165680475) internal successors, (4539), 1690 states have internal predecessors, (4539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 4539 transitions. [2021-03-10 14:36:14,285 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 4539 transitions. Word has length 41 [2021-03-10 14:36:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:14,285 INFO L480 AbstractCegarLoop]: Abstraction has 1691 states and 4539 transitions. [2021-03-10 14:36:14,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 4539 transitions. [2021-03-10 14:36:14,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:14,287 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:14,287 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:14,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 14:36:14,505 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:14,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:14,505 INFO L82 PathProgramCache]: Analyzing trace with hash 784139351, now seen corresponding path program 1 times [2021-03-10 14:36:14,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:14,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354403998] [2021-03-10 14:36:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:14,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354403998] [2021-03-10 14:36:14,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734364572] [2021-03-10 14:36:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:14,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:14,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:14,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:14,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 14:36:14,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827672405] [2021-03-10 14:36:14,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 14:36:14,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:14,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 14:36:14,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-10 14:36:14,786 INFO L87 Difference]: Start difference. First operand 1691 states and 4539 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:14,961 INFO L93 Difference]: Finished difference Result 2938 states and 7493 transitions. [2021-03-10 14:36:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 14:36:14,961 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 14:36:14,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:14,965 INFO L225 Difference]: With dead ends: 2938 [2021-03-10 14:36:14,965 INFO L226 Difference]: Without dead ends: 2546 [2021-03-10 14:36:14,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-03-10 14:36:14,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-03-10 14:36:14,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1776. [2021-03-10 14:36:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.656338028169014) internal successors, (4715), 1775 states have internal predecessors, (4715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 4715 transitions. [2021-03-10 14:36:14,990 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 4715 transitions. Word has length 41 [2021-03-10 14:36:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:14,990 INFO L480 AbstractCegarLoop]: Abstraction has 1776 states and 4715 transitions. [2021-03-10 14:36:14,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 4715 transitions. [2021-03-10 14:36:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:14,992 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:14,992 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:15,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 14:36:15,207 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:15,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1132661283, now seen corresponding path program 2 times [2021-03-10 14:36:15,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:15,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411028520] [2021-03-10 14:36:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:15,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411028520] [2021-03-10 14:36:15,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282182883] [2021-03-10 14:36:15,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:15,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:15,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:15,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:15,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:15,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:15,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 14:36:15,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415560502] [2021-03-10 14:36:15,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 14:36:15,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:15,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 14:36:15,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 14:36:15,444 INFO L87 Difference]: Start difference. First operand 1776 states and 4715 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:15,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:15,702 INFO L93 Difference]: Finished difference Result 3530 states and 8941 transitions. [2021-03-10 14:36:15,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 14:36:15,702 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 14:36:15,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:15,708 INFO L225 Difference]: With dead ends: 3530 [2021-03-10 14:36:15,708 INFO L226 Difference]: Without dead ends: 3050 [2021-03-10 14:36:15,708 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-03-10 14:36:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2021-03-10 14:36:15,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 1968. [2021-03-10 14:36:15,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1967 states have (on average 2.7051347229283174) internal successors, (5321), 1967 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:15,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 5321 transitions. [2021-03-10 14:36:15,756 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 5321 transitions. Word has length 41 [2021-03-10 14:36:15,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:15,756 INFO L480 AbstractCegarLoop]: Abstraction has 1968 states and 5321 transitions. [2021-03-10 14:36:15,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:15,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 5321 transitions. [2021-03-10 14:36:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:15,758 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:15,758 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:15,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 14:36:15,971 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:15,972 INFO L82 PathProgramCache]: Analyzing trace with hash -767457719, now seen corresponding path program 3 times [2021-03-10 14:36:15,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:15,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066486788] [2021-03-10 14:36:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:16,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066486788] [2021-03-10 14:36:16,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732359194] [2021-03-10 14:36:16,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:16,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 14:36:16,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:16,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:16,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:16,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:16,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 14:36:16,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308091769] [2021-03-10 14:36:16,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:16,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:16,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:16,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:16,186 INFO L87 Difference]: Start difference. First operand 1968 states and 5321 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:16,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:16,579 INFO L93 Difference]: Finished difference Result 4000 states and 10552 transitions. [2021-03-10 14:36:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 14:36:16,580 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 14:36:16,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:16,586 INFO L225 Difference]: With dead ends: 4000 [2021-03-10 14:36:16,586 INFO L226 Difference]: Without dead ends: 3360 [2021-03-10 14:36:16,588 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 14:36:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-03-10 14:36:16,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2002. [2021-03-10 14:36:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 2.705647176411794) internal successors, (5414), 2001 states have internal predecessors, (5414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 5414 transitions. [2021-03-10 14:36:16,626 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 5414 transitions. Word has length 41 [2021-03-10 14:36:16,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:16,627 INFO L480 AbstractCegarLoop]: Abstraction has 2002 states and 5414 transitions. [2021-03-10 14:36:16,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:16,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 5414 transitions. [2021-03-10 14:36:16,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:16,629 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:16,629 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:16,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:16,839 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:16,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:16,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1586610595, now seen corresponding path program 2 times [2021-03-10 14:36:16,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:16,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250935780] [2021-03-10 14:36:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:16,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250935780] [2021-03-10 14:36:16,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063406127] [2021-03-10 14:36:16,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:16,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:16,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:16,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:16,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:17,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:17,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 14:36:17,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220890422] [2021-03-10 14:36:17,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 14:36:17,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:17,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 14:36:17,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:17,098 INFO L87 Difference]: Start difference. First operand 2002 states and 5414 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:17,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:17,294 INFO L93 Difference]: Finished difference Result 3462 states and 9194 transitions. [2021-03-10 14:36:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 14:36:17,294 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 46 [2021-03-10 14:36:17,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:17,298 INFO L225 Difference]: With dead ends: 3462 [2021-03-10 14:36:17,298 INFO L226 Difference]: Without dead ends: 3098 [2021-03-10 14:36:17,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-03-10 14:36:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-03-10 14:36:17,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 2192. [2021-03-10 14:36:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 2.7156549520766773) internal successors, (5950), 2191 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 5950 transitions. [2021-03-10 14:36:17,329 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 5950 transitions. Word has length 46 [2021-03-10 14:36:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:17,330 INFO L480 AbstractCegarLoop]: Abstraction has 2192 states and 5950 transitions. [2021-03-10 14:36:17,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 5950 transitions. [2021-03-10 14:36:17,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:17,332 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:17,332 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:17,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:17,550 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash -889210242, now seen corresponding path program 3 times [2021-03-10 14:36:17,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:17,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330667593] [2021-03-10 14:36:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:17,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330667593] [2021-03-10 14:36:17,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463480272] [2021-03-10 14:36:17,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:17,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 14:36:17,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:17,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 14:36:17,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:17,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:17,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-03-10 14:36:17,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701684466] [2021-03-10 14:36:17,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 14:36:17,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:17,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 14:36:17,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-10 14:36:17,772 INFO L87 Difference]: Start difference. First operand 2192 states and 5950 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:17,868 INFO L93 Difference]: Finished difference Result 3067 states and 8107 transitions. [2021-03-10 14:36:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 14:36:17,869 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 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 46 [2021-03-10 14:36:17,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:17,873 INFO L225 Difference]: With dead ends: 3067 [2021-03-10 14:36:17,873 INFO L226 Difference]: Without dead ends: 2915 [2021-03-10 14:36:17,873 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2021-03-10 14:36:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 2256. [2021-03-10 14:36:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.70509977827051) internal successors, (6100), 2255 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:17,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6100 transitions. [2021-03-10 14:36:17,898 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6100 transitions. Word has length 46 [2021-03-10 14:36:17,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:17,898 INFO L480 AbstractCegarLoop]: Abstraction has 2256 states and 6100 transitions. [2021-03-10 14:36:17,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:17,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6100 transitions. [2021-03-10 14:36:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:17,900 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:17,900 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:18,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 14:36:18,114 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:18,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:18,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1088802446, now seen corresponding path program 4 times [2021-03-10 14:36:18,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:18,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106250600] [2021-03-10 14:36:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:18,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106250600] [2021-03-10 14:36:18,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846703701] [2021-03-10 14:36:18,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:18,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 14:36:18,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:18,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:18,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:18,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:18,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:18,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221973352] [2021-03-10 14:36:18,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:18,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:18,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:18,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:18,398 INFO L87 Difference]: Start difference. First operand 2256 states and 6100 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:18,733 INFO L93 Difference]: Finished difference Result 3930 states and 10460 transitions. [2021-03-10 14:36:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 14:36:18,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 46 [2021-03-10 14:36:18,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:18,738 INFO L225 Difference]: With dead ends: 3930 [2021-03-10 14:36:18,738 INFO L226 Difference]: Without dead ends: 3566 [2021-03-10 14:36:18,738 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-03-10 14:36:18,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2021-03-10 14:36:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 2217. [2021-03-10 14:36:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 2.7098375451263537) internal successors, (6005), 2216 states have internal predecessors, (6005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6005 transitions. [2021-03-10 14:36:18,765 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6005 transitions. Word has length 46 [2021-03-10 14:36:18,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:18,765 INFO L480 AbstractCegarLoop]: Abstraction has 2217 states and 6005 transitions. [2021-03-10 14:36:18,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:18,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6005 transitions. [2021-03-10 14:36:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:18,767 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:18,767 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:18,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 14:36:18,983 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:18,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:18,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1419794746, now seen corresponding path program 1 times [2021-03-10 14:36:18,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:18,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294287540] [2021-03-10 14:36:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:19,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294287540] [2021-03-10 14:36:19,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978294985] [2021-03-10 14:36:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:19,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:19,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:19,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:19,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:19,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164029227] [2021-03-10 14:36:19,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:19,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:19,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:19,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:19,228 INFO L87 Difference]: Start difference. First operand 2217 states and 6005 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:19,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:19,397 INFO L93 Difference]: Finished difference Result 3279 states and 8523 transitions. [2021-03-10 14:36:19,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 14:36:19,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 46 [2021-03-10 14:36:19,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:19,400 INFO L225 Difference]: With dead ends: 3279 [2021-03-10 14:36:19,400 INFO L226 Difference]: Without dead ends: 3127 [2021-03-10 14:36:19,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-03-10 14:36:19,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3127 states. [2021-03-10 14:36:19,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3127 to 2256. [2021-03-10 14:36:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.70509977827051) internal successors, (6100), 2255 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6100 transitions. [2021-03-10 14:36:19,424 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6100 transitions. Word has length 46 [2021-03-10 14:36:19,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:19,425 INFO L480 AbstractCegarLoop]: Abstraction has 2256 states and 6100 transitions. [2021-03-10 14:36:19,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6100 transitions. [2021-03-10 14:36:19,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:19,427 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:19,427 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:19,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 14:36:19,639 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:19,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1768316678, now seen corresponding path program 2 times [2021-03-10 14:36:19,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:19,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83516106] [2021-03-10 14:36:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:19,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83516106] [2021-03-10 14:36:19,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529152171] [2021-03-10 14:36:19,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:19,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:19,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:19,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:19,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:19,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:19,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:19,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237332118] [2021-03-10 14:36:19,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:19,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:19,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:19,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:19,897 INFO L87 Difference]: Start difference. First operand 2256 states and 6100 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:20,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:20,168 INFO L93 Difference]: Finished difference Result 3247 states and 8567 transitions. [2021-03-10 14:36:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 14:36:20,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 46 [2021-03-10 14:36:20,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:20,171 INFO L225 Difference]: With dead ends: 3247 [2021-03-10 14:36:20,171 INFO L226 Difference]: Without dead ends: 3095 [2021-03-10 14:36:20,172 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-03-10 14:36:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-03-10 14:36:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 2336. [2021-03-10 14:36:20,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 2.71948608137045) internal successors, (6350), 2335 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:20,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 6350 transitions. [2021-03-10 14:36:20,200 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 6350 transitions. Word has length 46 [2021-03-10 14:36:20,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:20,200 INFO L480 AbstractCegarLoop]: Abstraction has 2336 states and 6350 transitions. [2021-03-10 14:36:20,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:20,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 6350 transitions. [2021-03-10 14:36:20,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:20,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:20,202 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:20,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:20,415 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:20,416 INFO L82 PathProgramCache]: Analyzing trace with hash -131802324, now seen corresponding path program 3 times [2021-03-10 14:36:20,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:20,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137927542] [2021-03-10 14:36:20,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:20,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137927542] [2021-03-10 14:36:20,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592685415] [2021-03-10 14:36:20,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:20,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 14:36:20,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:20,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:20,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:20,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:20,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:20,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958228741] [2021-03-10 14:36:20,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:20,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:20,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:20,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:20,724 INFO L87 Difference]: Start difference. First operand 2336 states and 6350 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:21,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:21,156 INFO L93 Difference]: Finished difference Result 4350 states and 11556 transitions. [2021-03-10 14:36:21,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 14:36:21,157 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 46 [2021-03-10 14:36:21,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:21,160 INFO L225 Difference]: With dead ends: 4350 [2021-03-10 14:36:21,160 INFO L226 Difference]: Without dead ends: 3986 [2021-03-10 14:36:21,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 411.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1146, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 14:36:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-03-10 14:36:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 2213. [2021-03-10 14:36:21,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2212 states have (on average 2.7102169981916817) internal successors, (5995), 2212 states have internal predecessors, (5995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 5995 transitions. [2021-03-10 14:36:21,189 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 5995 transitions. Word has length 46 [2021-03-10 14:36:21,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:21,189 INFO L480 AbstractCegarLoop]: Abstraction has 2213 states and 5995 transitions. [2021-03-10 14:36:21,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 5995 transitions. [2021-03-10 14:36:21,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:21,191 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:21,191 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:21,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 14:36:21,406 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:21,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:21,406 INFO L82 PathProgramCache]: Analyzing trace with hash 170319376, now seen corresponding path program 4 times [2021-03-10 14:36:21,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:21,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362717541] [2021-03-10 14:36:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:21,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362717541] [2021-03-10 14:36:21,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67381687] [2021-03-10 14:36:21,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:21,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 14:36:21,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:21,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:21,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:21,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:21,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:21,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235942581] [2021-03-10 14:36:21,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:21,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:21,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:21,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:21,668 INFO L87 Difference]: Start difference. First operand 2213 states and 5995 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:21,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:21,876 INFO L93 Difference]: Finished difference Result 3479 states and 8923 transitions. [2021-03-10 14:36:21,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 14:36:21,877 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 46 [2021-03-10 14:36:21,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:21,879 INFO L225 Difference]: With dead ends: 3479 [2021-03-10 14:36:21,880 INFO L226 Difference]: Without dead ends: 3327 [2021-03-10 14:36:21,880 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-03-10 14:36:21,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-03-10 14:36:21,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 2320. [2021-03-10 14:36:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 2.6877964639931005) internal successors, (6233), 2319 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 6233 transitions. [2021-03-10 14:36:21,907 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 6233 transitions. Word has length 46 [2021-03-10 14:36:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:21,907 INFO L480 AbstractCegarLoop]: Abstraction has 2320 states and 6233 transitions. [2021-03-10 14:36:21,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:21,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 6233 transitions. [2021-03-10 14:36:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:21,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:21,909 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:22,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:22,123 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:22,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:22,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1910402620, now seen corresponding path program 5 times [2021-03-10 14:36:22,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:22,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536586082] [2021-03-10 14:36:22,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:22,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536586082] [2021-03-10 14:36:22,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47133256] [2021-03-10 14:36:22,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:22,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:22,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:22,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:22,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:22,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:22,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:22,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185173232] [2021-03-10 14:36:22,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:22,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:22,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:22,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:22,368 INFO L87 Difference]: Start difference. First operand 2320 states and 6233 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:22,638 INFO L93 Difference]: Finished difference Result 3898 states and 9961 transitions. [2021-03-10 14:36:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 14:36:22,638 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 46 [2021-03-10 14:36:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:22,642 INFO L225 Difference]: With dead ends: 3898 [2021-03-10 14:36:22,642 INFO L226 Difference]: Without dead ends: 3746 [2021-03-10 14:36:22,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-03-10 14:36:22,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3746 states. [2021-03-10 14:36:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3746 to 2425. [2021-03-10 14:36:22,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.7219471947194718) internal successors, (6598), 2424 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:22,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 6598 transitions. [2021-03-10 14:36:22,670 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 6598 transitions. Word has length 46 [2021-03-10 14:36:22,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:22,670 INFO L480 AbstractCegarLoop]: Abstraction has 2425 states and 6598 transitions. [2021-03-10 14:36:22,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 6598 transitions. [2021-03-10 14:36:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:22,673 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:22,673 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:22,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 14:36:22,887 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:22,888 INFO L82 PathProgramCache]: Analyzing trace with hash -594406078, now seen corresponding path program 6 times [2021-03-10 14:36:22,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:22,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610386876] [2021-03-10 14:36:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:22,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610386876] [2021-03-10 14:36:22,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600145254] [2021-03-10 14:36:22,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:22,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 14:36:22,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:22,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 14:36:22,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:23,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:23,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:23,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128084128] [2021-03-10 14:36:23,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:23,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:23,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:23,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:23,157 INFO L87 Difference]: Start difference. First operand 2425 states and 6598 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:23,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:23,455 INFO L93 Difference]: Finished difference Result 3943 states and 10341 transitions. [2021-03-10 14:36:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 14:36:23,455 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 46 [2021-03-10 14:36:23,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:23,459 INFO L225 Difference]: With dead ends: 3943 [2021-03-10 14:36:23,459 INFO L226 Difference]: Without dead ends: 3791 [2021-03-10 14:36:23,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-03-10 14:36:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3791 states. [2021-03-10 14:36:23,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3791 to 2476. [2021-03-10 14:36:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 2.7406060606060607) internal successors, (6783), 2475 states have internal predecessors, (6783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:23,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 6783 transitions. [2021-03-10 14:36:23,487 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 6783 transitions. Word has length 46 [2021-03-10 14:36:23,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:23,487 INFO L480 AbstractCegarLoop]: Abstraction has 2476 states and 6783 transitions. [2021-03-10 14:36:23,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 6783 transitions. [2021-03-10 14:36:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:23,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:23,490 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:23,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 14:36:23,703 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:23,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:23,703 INFO L82 PathProgramCache]: Analyzing trace with hash -654873590, now seen corresponding path program 7 times [2021-03-10 14:36:23,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:23,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107887653] [2021-03-10 14:36:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:23,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107887653] [2021-03-10 14:36:23,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533637022] [2021-03-10 14:36:23,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:23,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:23,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:23,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:23,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307554748] [2021-03-10 14:36:23,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:23,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:23,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:23,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:23,915 INFO L87 Difference]: Start difference. First operand 2476 states and 6783 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:24,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:24,491 INFO L93 Difference]: Finished difference Result 5008 states and 13274 transitions. [2021-03-10 14:36:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 14:36:24,492 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 46 [2021-03-10 14:36:24,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:24,496 INFO L225 Difference]: With dead ends: 5008 [2021-03-10 14:36:24,496 INFO L226 Difference]: Without dead ends: 4474 [2021-03-10 14:36:24,496 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 489.3ms TimeCoverageRelationStatistics Valid=488, Invalid=1674, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 14:36:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4474 states. [2021-03-10 14:36:24,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4474 to 2506. [2021-03-10 14:36:24,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2505 states have (on average 2.7245508982035926) internal successors, (6825), 2505 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 6825 transitions. [2021-03-10 14:36:24,526 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 6825 transitions. Word has length 46 [2021-03-10 14:36:24,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:24,526 INFO L480 AbstractCegarLoop]: Abstraction has 2506 states and 6825 transitions. [2021-03-10 14:36:24,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 6825 transitions. [2021-03-10 14:36:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:24,528 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:24,529 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:24,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 14:36:24,741 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:24,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1251148933, now seen corresponding path program 5 times [2021-03-10 14:36:24,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:24,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841972167] [2021-03-10 14:36:24,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:24,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841972167] [2021-03-10 14:36:24,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611557340] [2021-03-10 14:36:24,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:24,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 14:36:24,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:24,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:24,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:25,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:25,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 14:36:25,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011382279] [2021-03-10 14:36:25,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 14:36:25,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:25,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 14:36:25,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-10 14:36:25,041 INFO L87 Difference]: Start difference. First operand 2506 states and 6825 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:25,168 INFO L93 Difference]: Finished difference Result 3586 states and 9461 transitions. [2021-03-10 14:36:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 14:36:25,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 51 [2021-03-10 14:36:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:25,172 INFO L225 Difference]: With dead ends: 3586 [2021-03-10 14:36:25,172 INFO L226 Difference]: Without dead ends: 3434 [2021-03-10 14:36:25,172 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-03-10 14:36:25,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-03-10 14:36:25,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 2600. [2021-03-10 14:36:25,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.7206617929973067) internal successors, (7071), 2599 states have internal predecessors, (7071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 7071 transitions. [2021-03-10 14:36:25,198 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 7071 transitions. Word has length 51 [2021-03-10 14:36:25,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:25,199 INFO L480 AbstractCegarLoop]: Abstraction has 2600 states and 7071 transitions. [2021-03-10 14:36:25,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 7071 transitions. [2021-03-10 14:36:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:25,201 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:25,201 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:25,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 14:36:25,408 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:25,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:25,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1450741137, now seen corresponding path program 6 times [2021-03-10 14:36:25,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:25,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082209880] [2021-03-10 14:36:25,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:25,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082209880] [2021-03-10 14:36:25,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177444875] [2021-03-10 14:36:25,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:25,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 14:36:25,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:25,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 14:36:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:25,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:25,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 14:36:25,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144071813] [2021-03-10 14:36:25,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:25,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:25,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:25,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:25,609 INFO L87 Difference]: Start difference. First operand 2600 states and 7071 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:25,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:25,852 INFO L93 Difference]: Finished difference Result 4668 states and 12344 transitions. [2021-03-10 14:36:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 14:36:25,852 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 14:36:25,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:25,856 INFO L225 Difference]: With dead ends: 4668 [2021-03-10 14:36:25,856 INFO L226 Difference]: Without dead ends: 4304 [2021-03-10 14:36:25,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-03-10 14:36:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2021-03-10 14:36:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 2541. [2021-03-10 14:36:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 2.7173228346456693) internal successors, (6902), 2540 states have internal predecessors, (6902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 6902 transitions. [2021-03-10 14:36:25,887 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 6902 transitions. Word has length 51 [2021-03-10 14:36:25,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:25,887 INFO L480 AbstractCegarLoop]: Abstraction has 2541 states and 6902 transitions. [2021-03-10 14:36:25,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:25,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 6902 transitions. [2021-03-10 14:36:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:25,889 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:25,889 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:26,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:26,103 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:26,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1057856055, now seen corresponding path program 8 times [2021-03-10 14:36:26,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:26,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177452005] [2021-03-10 14:36:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:26,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177452005] [2021-03-10 14:36:26,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680923999] [2021-03-10 14:36:26,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:26,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:26,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:26,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:26,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:26,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:26,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 14:36:26,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33030192] [2021-03-10 14:36:26,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 14:36:26,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:26,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 14:36:26,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-10 14:36:26,413 INFO L87 Difference]: Start difference. First operand 2541 states and 6902 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:26,659 INFO L93 Difference]: Finished difference Result 3908 states and 10058 transitions. [2021-03-10 14:36:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 14:36:26,659 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 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 51 [2021-03-10 14:36:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:26,663 INFO L225 Difference]: With dead ends: 3908 [2021-03-10 14:36:26,663 INFO L226 Difference]: Without dead ends: 3756 [2021-03-10 14:36:26,663 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-03-10 14:36:26,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3756 states. [2021-03-10 14:36:26,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3756 to 2570. [2021-03-10 14:36:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2569 states have (on average 2.715064227325808) internal successors, (6975), 2569 states have internal predecessors, (6975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 6975 transitions. [2021-03-10 14:36:26,689 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 6975 transitions. Word has length 51 [2021-03-10 14:36:26,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:26,689 INFO L480 AbstractCegarLoop]: Abstraction has 2570 states and 6975 transitions. [2021-03-10 14:36:26,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 6975 transitions. [2021-03-10 14:36:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:26,691 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:26,691 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:26,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:26,907 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:26,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1406377987, now seen corresponding path program 9 times [2021-03-10 14:36:26,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:26,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314062131] [2021-03-10 14:36:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:26,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314062131] [2021-03-10 14:36:26,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793857670] [2021-03-10 14:36:26,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:27,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 14:36:27,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:27,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 14:36:27,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:27,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:27,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 14:36:27,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383848071] [2021-03-10 14:36:27,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:27,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:27,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:27,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:27,168 INFO L87 Difference]: Start difference. First operand 2570 states and 6975 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:27,435 INFO L93 Difference]: Finished difference Result 4226 states and 10956 transitions. [2021-03-10 14:36:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 14:36:27,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 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 51 [2021-03-10 14:36:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:27,439 INFO L225 Difference]: With dead ends: 4226 [2021-03-10 14:36:27,439 INFO L226 Difference]: Without dead ends: 4074 [2021-03-10 14:36:27,441 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 247.0ms TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2021-03-10 14:36:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4074 states. [2021-03-10 14:36:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4074 to 2650. [2021-03-10 14:36:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2650 states, 2649 states have (on average 2.7274443186107966) internal successors, (7225), 2649 states have internal predecessors, (7225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2650 states to 2650 states and 7225 transitions. [2021-03-10 14:36:27,469 INFO L78 Accepts]: Start accepts. Automaton has 2650 states and 7225 transitions. Word has length 51 [2021-03-10 14:36:27,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:27,470 INFO L480 AbstractCegarLoop]: Abstraction has 2650 states and 7225 transitions. [2021-03-10 14:36:27,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:27,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2650 states and 7225 transitions. [2021-03-10 14:36:27,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:27,472 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:27,472 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:27,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 14:36:27,683 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:27,683 INFO L82 PathProgramCache]: Analyzing trace with hash -493741015, now seen corresponding path program 10 times [2021-03-10 14:36:27,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:27,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035180733] [2021-03-10 14:36:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:27,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035180733] [2021-03-10 14:36:27,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92259086] [2021-03-10 14:36:27,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:27,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 14:36:27,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:27,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:27,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:28,221 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 25 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown