/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_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 14:36:11,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 14:36:11,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 14:36:11,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 14:36:11,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 14:36:11,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 14:36:11,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 14:36:11,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 14:36:11,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 14:36:11,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 14:36:11,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 14:36:11,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 14:36:11,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 14:36:11,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 14:36:11,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 14:36:11,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 14:36:11,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 14:36:11,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 14:36:11,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 14:36:11,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 14:36:11,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 14:36:11,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 14:36:11,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 14:36:11,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 14:36:11,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 14:36:11,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 14:36:11,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 14:36:11,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 14:36:11,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 14:36:11,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-10 14:36:11,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 14:36:11,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 14:36:11,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 14:36:11,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 14:36:11,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 14:36:11,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 14:36:11,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 14:36:11,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 14:36:11,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 14:36:11,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 14:36:11,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 14:36:11,418 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 14:36:11,444 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 14:36:11,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 14:36:11,445 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 14:36:11,445 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 14:36:11,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 14:36:11,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 14:36:11,448 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 14:36:11,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 14:36:11,448 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 14:36:11,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 14:36:11,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 14:36:11,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 14:36:11,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 14:36:11,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 14:36:11,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 14:36:11,449 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 14:36:11,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 14:36:11,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 14:36:11,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 14:36:11,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 14:36:11,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 14:36:11,450 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 14:36:11,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 14:36:11,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 14:36:11,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 14:36:11,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 14:36:11,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 14:36:11,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 14:36:11,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 14:36:11,451 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 14:36:11,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 14:36:11,451 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 14:36:11,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 14:36:11,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 14:36:11,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 14:36:11,743 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-10 14:36:11,744 INFO L275 PluginConnector]: CDTParser initialized [2021-03-10 14:36:11,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-03-10 14:36:11,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b32742a3/443b1e3215034298b558267ed011a1b8/FLAG281ead593 [2021-03-10 14:36:12,175 INFO L306 CDTParser]: Found 1 translation units. [2021-03-10 14:36:12,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-03-10 14:36:12,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b32742a3/443b1e3215034298b558267ed011a1b8/FLAG281ead593 [2021-03-10 14:36:12,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b32742a3/443b1e3215034298b558267ed011a1b8 [2021-03-10 14:36:12,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 14:36:12,208 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-10 14:36:12,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-10 14:36:12,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-10 14:36:12,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-10 14:36:12,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e32c22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12, skipping insertion in model container [2021-03-10 14:36:12,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-10 14:36:12,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-10 14:36:12,474 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_longest-1.i[30286,30299] [2021-03-10 14:36:12,482 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_longest-1.i[31038,31051] [2021-03-10 14:36:12,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 14:36:12,487 INFO L203 MainTranslator]: Completed pre-run [2021-03-10 14:36:12,505 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_longest-1.i[30286,30299] [2021-03-10 14:36:12,508 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_longest-1.i[31038,31051] [2021-03-10 14:36:12,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 14:36:12,557 INFO L208 MainTranslator]: Completed translation [2021-03-10 14:36:12,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12 WrapperNode [2021-03-10 14:36:12,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-10 14:36:12,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 14:36:12,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 14:36:12,559 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 14:36:12,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 14:36:12,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 14:36:12,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 14:36:12,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 14:36:12,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 14:36:12,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 14:36:12,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 14:36:12,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 14:36:12,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (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 14:36:12,679 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-03-10 14:36:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-03-10 14:36:12,680 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-03-10 14:36:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-03-10 14:36:12,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-10 14:36:12,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-10 14:36:12,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-10 14:36:12,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-10 14:36:12,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-10 14:36:12,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-10 14:36:12,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 14:36:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 14:36:12,681 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 14:36:12,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 14:36:12,958 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-03-10 14:36:12,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 02:36:12 BoogieIcfgContainer [2021-03-10 14:36:12,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 14:36:12,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 14:36:12,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 14:36:12,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 14:36:12,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.03 02:36:12" (1/3) ... [2021-03-10 14:36:12,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b188d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 02:36:12, skipping insertion in model container [2021-03-10 14:36:12,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (2/3) ... [2021-03-10 14:36:12,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b188d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 02:36:12, skipping insertion in model container [2021-03-10 14:36:12,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 02:36:12" (3/3) ... [2021-03-10 14:36:12,967 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2021-03-10 14:36:12,971 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 14:36:12,971 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 14:36:12,973 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 14:36:12,974 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 14:36:13,004 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,005 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,005 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,005 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,005 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,005 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,005 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,005 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,006 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,006 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,006 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,006 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,006 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,006 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,006 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,006 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,007 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,007 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,007 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,007 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,007 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,007 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,007 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,007 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,008 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,008 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,008 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,008 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,008 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,008 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,008 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,009 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,009 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,009 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,009 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,009 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,009 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,009 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,009 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,009 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,010 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,010 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,010 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,010 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,010 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,010 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,010 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,010 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,010 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,011 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,011 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,011 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,011 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,011 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,011 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,011 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,011 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,012 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,012 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,012 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,013 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,013 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,014 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,014 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,022 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,022 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,022 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,022 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,022 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,023 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,025 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 14:36:13,036 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 14:36:13,056 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 14:36:13,056 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 14:36:13,056 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 14:36:13,057 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 14:36:13,057 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 14:36:13,057 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 14:36:13,057 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 14:36:13,057 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 14:36:13,066 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 62 transitions, 134 flow [2021-03-10 14:36:13,140 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 14:36:13,145 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 14:36:13,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 14:36:13,152 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:13,152 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 14:36:13,152 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:13,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:13,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1965619843, now seen corresponding path program 1 times [2021-03-10 14:36:13,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:13,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062512446] [2021-03-10 14:36:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:13,385 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 14:36:13,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062512446] [2021-03-10 14:36:13,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:13,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 14:36:13,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793922492] [2021-03-10 14:36:13,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 14:36:13,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:13,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 14:36:13,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 14:36:13,403 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 14:36:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:13,550 INFO L93 Difference]: Finished difference Result 3730 states and 10826 transitions. [2021-03-10 14:36:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 14:36:13,551 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 14:36:13,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:13,572 INFO L225 Difference]: With dead ends: 3730 [2021-03-10 14:36:13,572 INFO L226 Difference]: Without dead ends: 1168 [2021-03-10 14:36:13,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 14:36:13,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-03-10 14:36:13,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 903. [2021-03-10 14:36:13,648 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 14:36:13,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2443 transitions. [2021-03-10 14:36:13,654 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2443 transitions. Word has length 26 [2021-03-10 14:36:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:13,654 INFO L480 AbstractCegarLoop]: Abstraction has 903 states and 2443 transitions. [2021-03-10 14:36:13,655 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 14:36:13,655 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2443 transitions. [2021-03-10 14:36:13,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [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 [1, 1, 1, 1, 1, 1, 1, 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 14:36:13,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 14:36:13,658 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:13,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:13,658 INFO L82 PathProgramCache]: Analyzing trace with hash -303130507, now seen corresponding path program 1 times [2021-03-10 14:36:13,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:13,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150584291] [2021-03-10 14:36:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:13,780 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 14:36:13,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150584291] [2021-03-10 14:36:13,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:13,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 14:36:13,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666595783] [2021-03-10 14:36:13,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 14:36:13,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:13,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 14:36:13,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 14:36:13,783 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 14:36:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:13,856 INFO L93 Difference]: Finished difference Result 1680 states and 4453 transitions. [2021-03-10 14:36:13,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 14:36:13,857 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 14:36:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:13,862 INFO L225 Difference]: With dead ends: 1680 [2021-03-10 14:36:13,862 INFO L226 Difference]: Without dead ends: 1422 [2021-03-10 14:36:13,862 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 14:36:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-03-10 14:36:13,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 998. [2021-03-10 14:36:13,885 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 14:36:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2711 transitions. [2021-03-10 14:36:13,888 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2711 transitions. Word has length 31 [2021-03-10 14:36:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:13,888 INFO L480 AbstractCegarLoop]: Abstraction has 998 states and 2711 transitions. [2021-03-10 14:36:13,888 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 14:36:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2711 transitions. [2021-03-10 14:36:13,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 14:36:13,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:13,890 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 14:36:13,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 14:36:13,890 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:13,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:13,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2076066167, now seen corresponding path program 1 times [2021-03-10 14:36:13,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:13,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182853421] [2021-03-10 14:36:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:13,955 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 14:36:13,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182853421] [2021-03-10 14:36:13,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:13,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 14:36:13,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101529203] [2021-03-10 14:36:13,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 14:36:13,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:13,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 14:36:13,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 14:36:13,956 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 14:36:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:14,021 INFO L93 Difference]: Finished difference Result 1726 states and 4512 transitions. [2021-03-10 14:36:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 14:36:14,021 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 14:36:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:14,026 INFO L225 Difference]: With dead ends: 1726 [2021-03-10 14:36:14,026 INFO L226 Difference]: Without dead ends: 1422 [2021-03-10 14:36:14,026 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 14:36:14,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-03-10 14:36:14,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1101. [2021-03-10 14:36:14,049 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 14:36:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 2934 transitions. [2021-03-10 14:36:14,053 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 2934 transitions. Word has length 31 [2021-03-10 14:36:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:14,053 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 2934 transitions. [2021-03-10 14:36:14,053 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 14:36:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 2934 transitions. [2021-03-10 14:36:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 14:36:14,054 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:14,054 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 14:36:14,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 14:36:14,055 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1770231059, now seen corresponding path program 2 times [2021-03-10 14:36:14,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:14,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166788162] [2021-03-10 14:36:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:14,175 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 14:36:14,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166788162] [2021-03-10 14:36:14,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:14,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 14:36:14,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931044404] [2021-03-10 14:36:14,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 14:36:14,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:14,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 14:36:14,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 14:36:14,177 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 14:36:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:14,276 INFO L93 Difference]: Finished difference Result 1918 states and 5024 transitions. [2021-03-10 14:36:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 14:36:14,277 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 14:36:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:14,283 INFO L225 Difference]: With dead ends: 1918 [2021-03-10 14:36:14,286 INFO L226 Difference]: Without dead ends: 1596 [2021-03-10 14:36:14,286 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 14:36:14,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-03-10 14:36:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1179. [2021-03-10 14:36:14,310 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 14:36:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 3159 transitions. [2021-03-10 14:36:14,314 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 3159 transitions. Word has length 31 [2021-03-10 14:36:14,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:14,315 INFO L480 AbstractCegarLoop]: Abstraction has 1179 states and 3159 transitions. [2021-03-10 14:36:14,315 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 14:36:14,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 3159 transitions. [2021-03-10 14:36:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:14,318 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:14,318 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 14:36:14,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 14:36:14,318 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:14,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:14,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1032684214, now seen corresponding path program 1 times [2021-03-10 14:36:14,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:14,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517945428] [2021-03-10 14:36:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:14,419 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 14:36:14,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517945428] [2021-03-10 14:36:14,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396213207] [2021-03-10 14:36:14,419 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 14:36:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:14,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 14:36:14,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:14,645 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 14:36:14,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:14,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 14:36:14,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796910189] [2021-03-10 14:36:14,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 14:36:14,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:14,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 14:36:14,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 14:36:14,647 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 14:36:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:14,833 INFO L93 Difference]: Finished difference Result 2364 states and 6203 transitions. [2021-03-10 14:36:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 14:36:14,834 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 14:36:14,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:14,842 INFO L225 Difference]: With dead ends: 2364 [2021-03-10 14:36:14,843 INFO L226 Difference]: Without dead ends: 2000 [2021-03-10 14:36:14,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-03-10 14:36:14,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-03-10 14:36:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1369. [2021-03-10 14:36:14,870 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 14:36:14,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 3695 transitions. [2021-03-10 14:36:14,873 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 3695 transitions. Word has length 36 [2021-03-10 14:36:14,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:14,874 INFO L480 AbstractCegarLoop]: Abstraction has 1369 states and 3695 transitions. [2021-03-10 14:36:14,874 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 14:36:14,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 3695 transitions. [2021-03-10 14:36:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:14,875 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:14,875 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 14:36:15,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:15,095 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:15,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:15,095 INFO L82 PathProgramCache]: Analyzing trace with hash 969132415, now seen corresponding path program 1 times [2021-03-10 14:36:15,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:15,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116423415] [2021-03-10 14:36:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:15,179 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 14:36:15,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116423415] [2021-03-10 14:36:15,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:15,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 14:36:15,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273270677] [2021-03-10 14:36:15,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 14:36:15,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:15,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 14:36:15,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 14:36:15,184 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 14:36:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:15,253 INFO L93 Difference]: Finished difference Result 2041 states and 5346 transitions. [2021-03-10 14:36:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 14:36:15,254 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 14:36:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:15,260 INFO L225 Difference]: With dead ends: 2041 [2021-03-10 14:36:15,260 INFO L226 Difference]: Without dead ends: 1889 [2021-03-10 14:36:15,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 14:36:15,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2021-03-10 14:36:15,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1433. [2021-03-10 14:36:15,285 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 14:36:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 3845 transitions. [2021-03-10 14:36:15,289 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 3845 transitions. Word has length 36 [2021-03-10 14:36:15,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:15,289 INFO L480 AbstractCegarLoop]: Abstraction has 1433 states and 3845 transitions. [2021-03-10 14:36:15,289 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 14:36:15,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 3845 transitions. [2021-03-10 14:36:15,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:15,290 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:15,290 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 14:36:15,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 14:36:15,291 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:15,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1417802485, now seen corresponding path program 2 times [2021-03-10 14:36:15,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:15,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399856234] [2021-03-10 14:36:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:15,377 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 14:36:15,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399856234] [2021-03-10 14:36:15,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:15,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 14:36:15,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284614035] [2021-03-10 14:36:15,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 14:36:15,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:15,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 14:36:15,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 14:36:15,379 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 14:36:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:15,515 INFO L93 Difference]: Finished difference Result 2336 states and 6145 transitions. [2021-03-10 14:36:15,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 14:36:15,516 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 14:36:15,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:15,523 INFO L225 Difference]: With dead ends: 2336 [2021-03-10 14:36:15,523 INFO L226 Difference]: Without dead ends: 2078 [2021-03-10 14:36:15,523 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 14:36:15,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-03-10 14:36:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1412. [2021-03-10 14:36:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.6959603118355777) internal successors, (3804), 1411 states have internal predecessors, (3804), 0 states have call successors, (0), 0 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 14:36:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 3804 transitions. [2021-03-10 14:36:15,553 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 3804 transitions. Word has length 36 [2021-03-10 14:36:15,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:15,554 INFO L480 AbstractCegarLoop]: Abstraction has 1412 states and 3804 transitions. [2021-03-10 14:36:15,554 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 14:36:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 3804 transitions. [2021-03-10 14:36:15,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:15,556 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:15,556 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 14:36:15,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 14:36:15,556 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:15,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1379254383, now seen corresponding path program 3 times [2021-03-10 14:36:15,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:15,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262527966] [2021-03-10 14:36:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:15,630 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 14:36:15,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262527966] [2021-03-10 14:36:15,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:15,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 14:36:15,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111413531] [2021-03-10 14:36:15,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 14:36:15,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:15,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 14:36:15,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 14:36:15,632 INFO L87 Difference]: Start difference. First operand 1412 states and 3804 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 14:36:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:15,765 INFO L93 Difference]: Finished difference Result 2665 states and 7026 transitions. [2021-03-10 14:36:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 14:36:15,765 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 14:36:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:15,773 INFO L225 Difference]: With dead ends: 2665 [2021-03-10 14:36:15,773 INFO L226 Difference]: Without dead ends: 2237 [2021-03-10 14:36:15,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:15,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-03-10 14:36:15,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 1582. [2021-03-10 14:36:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.6824794433902595) internal successors, (4241), 1581 states have internal predecessors, (4241), 0 states have call successors, (0), 0 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 14:36:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 4241 transitions. [2021-03-10 14:36:15,804 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 4241 transitions. Word has length 36 [2021-03-10 14:36:15,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:15,804 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 4241 transitions. [2021-03-10 14:36:15,804 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 14:36:15,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 4241 transitions. [2021-03-10 14:36:15,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:15,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:15,806 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 14:36:15,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 14:36:15,806 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:15,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:15,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1177411618, now seen corresponding path program 1 times [2021-03-10 14:36:15,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:15,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440986702] [2021-03-10 14:36:15,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:15,885 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 14:36:15,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440986702] [2021-03-10 14:36:15,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110754946] [2021-03-10 14:36:15,885 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 14:36:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:15,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:15,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:16,115 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 14:36:16,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:16,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 14:36:16,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421984294] [2021-03-10 14:36:16,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:16,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:16,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:16,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:16,118 INFO L87 Difference]: Start difference. First operand 1582 states and 4241 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 14:36:16,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:16,202 INFO L93 Difference]: Finished difference Result 2318 states and 6060 transitions. [2021-03-10 14:36:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 14:36:16,202 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 14:36:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:16,209 INFO L225 Difference]: With dead ends: 2318 [2021-03-10 14:36:16,209 INFO L226 Difference]: Without dead ends: 2166 [2021-03-10 14:36:16,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 14:36:16,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2021-03-10 14:36:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 1646. [2021-03-10 14:36:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 2.6693009118541036) internal successors, (4391), 1645 states have internal predecessors, (4391), 0 states have call successors, (0), 0 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 14:36:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 4391 transitions. [2021-03-10 14:36:16,251 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 4391 transitions. Word has length 41 [2021-03-10 14:36:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:16,252 INFO L480 AbstractCegarLoop]: Abstraction has 1646 states and 4391 transitions. [2021-03-10 14:36:16,253 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 14:36:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 4391 transitions. [2021-03-10 14:36:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:16,254 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:16,254 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 14:36:16,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 14:36:16,467 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:16,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:16,468 INFO L82 PathProgramCache]: Analyzing trace with hash -728741548, now seen corresponding path program 2 times [2021-03-10 14:36:16,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:16,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246506973] [2021-03-10 14:36:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:16,528 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 14:36:16,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246506973] [2021-03-10 14:36:16,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785799024] [2021-03-10 14:36:16,529 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 14:36:16,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:16,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:16,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:16,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:16,784 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 14:36:16,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:16,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 14:36:16,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572143533] [2021-03-10 14:36:16,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 14:36:16,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:16,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 14:36:16,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 14:36:16,786 INFO L87 Difference]: Start difference. First operand 1646 states and 4391 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:17,076 INFO L93 Difference]: Finished difference Result 3556 states and 9207 transitions. [2021-03-10 14:36:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 14:36:17,077 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 14:36:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:17,093 INFO L225 Difference]: With dead ends: 3556 [2021-03-10 14:36:17,094 INFO L226 Difference]: Without dead ends: 2864 [2021-03-10 14:36:17,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-03-10 14:36:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-03-10 14:36:17,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 1754. [2021-03-10 14:36:17,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 2.674272675413577) internal successors, (4688), 1753 states have internal predecessors, (4688), 0 states have call successors, (0), 0 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 14:36:17,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 4688 transitions. [2021-03-10 14:36:17,129 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 4688 transitions. Word has length 41 [2021-03-10 14:36:17,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:17,129 INFO L480 AbstractCegarLoop]: Abstraction has 1754 states and 4688 transitions. [2021-03-10 14:36:17,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:17,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 4688 transitions. [2021-03-10 14:36:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:17,132 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:17,132 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 14:36:17,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-10 14:36:17,350 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:17,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:17,350 INFO L82 PathProgramCache]: Analyzing trace with hash 956871302, now seen corresponding path program 1 times [2021-03-10 14:36:17,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:17,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235159468] [2021-03-10 14:36:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:17,412 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 14:36:17,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235159468] [2021-03-10 14:36:17,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104484167] [2021-03-10 14:36:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:17,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:17,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:17,569 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 14:36:17,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:17,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 14:36:17,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291245153] [2021-03-10 14:36:17,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:17,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:17,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:17,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:17,571 INFO L87 Difference]: Start difference. First operand 1754 states and 4688 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 14:36:17,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:17,649 INFO L93 Difference]: Finished difference Result 2664 states and 6830 transitions. [2021-03-10 14:36:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 14:36:17,649 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 14:36:17,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:17,653 INFO L225 Difference]: With dead ends: 2664 [2021-03-10 14:36:17,653 INFO L226 Difference]: Without dead ends: 2512 [2021-03-10 14:36:17,654 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 14:36:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-03-10 14:36:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 1779. [2021-03-10 14:36:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 2.6676040494938134) internal successors, (4743), 1778 states have internal predecessors, (4743), 0 states have call successors, (0), 0 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 14:36:17,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 4743 transitions. [2021-03-10 14:36:17,683 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 4743 transitions. Word has length 41 [2021-03-10 14:36:17,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:17,683 INFO L480 AbstractCegarLoop]: Abstraction has 1779 states and 4743 transitions. [2021-03-10 14:36:17,683 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 14:36:17,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 4743 transitions. [2021-03-10 14:36:17,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:17,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:17,685 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 14:36:17,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:17,895 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:17,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:17,895 INFO L82 PathProgramCache]: Analyzing trace with hash 249785212, now seen corresponding path program 2 times [2021-03-10 14:36:17,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:17,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880932516] [2021-03-10 14:36:17,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:17,944 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 14:36:17,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880932516] [2021-03-10 14:36:17,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105798211] [2021-03-10 14:36:17,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:17,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:17,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:17,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:17,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:18,121 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 14:36:18,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:18,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 14:36:18,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437864957] [2021-03-10 14:36:18,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:18,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:18,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:18,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:18,124 INFO L87 Difference]: Start difference. First operand 1779 states and 4743 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 14:36:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:18,215 INFO L93 Difference]: Finished difference Result 2664 states and 6830 transitions. [2021-03-10 14:36:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 14:36:18,215 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 14:36:18,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:18,219 INFO L225 Difference]: With dead ends: 2664 [2021-03-10 14:36:18,219 INFO L226 Difference]: Without dead ends: 2512 [2021-03-10 14:36:18,219 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-03-10 14:36:18,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-03-10 14:36:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 1758. [2021-03-10 14:36:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 2.6738759248719406) internal successors, (4698), 1757 states have internal predecessors, (4698), 0 states have call successors, (0), 0 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 14:36:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 4698 transitions. [2021-03-10 14:36:18,245 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 4698 transitions. Word has length 41 [2021-03-10 14:36:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:18,245 INFO L480 AbstractCegarLoop]: Abstraction has 1758 states and 4698 transitions. [2021-03-10 14:36:18,245 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 14:36:18,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 4698 transitions. [2021-03-10 14:36:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:18,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:18,247 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 14:36:18,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 14:36:18,462 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:18,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:18,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1083067482, now seen corresponding path program 3 times [2021-03-10 14:36:18,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:18,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420890315] [2021-03-10 14:36:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:18,517 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 14:36:18,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420890315] [2021-03-10 14:36:18,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333067803] [2021-03-10 14:36:18,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:18,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 14:36:18,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:18,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:18,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:18,675 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 14:36:18,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:18,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 14:36:18,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576712752] [2021-03-10 14:36:18,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:18,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:18,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:18,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:18,677 INFO L87 Difference]: Start difference. First operand 1758 states and 4698 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 14:36:18,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:18,839 INFO L93 Difference]: Finished difference Result 2940 states and 7553 transitions. [2021-03-10 14:36:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 14:36:18,840 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 14:36:18,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:18,843 INFO L225 Difference]: With dead ends: 2940 [2021-03-10 14:36:18,843 INFO L226 Difference]: Without dead ends: 2636 [2021-03-10 14:36:18,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-03-10 14:36:18,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-03-10 14:36:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1838. [2021-03-10 14:36:18,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1837 states have (on average 2.69352204681546) internal successors, (4948), 1837 states have internal predecessors, (4948), 0 states have call successors, (0), 0 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 14:36:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 4948 transitions. [2021-03-10 14:36:18,869 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 4948 transitions. Word has length 41 [2021-03-10 14:36:18,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:18,869 INFO L480 AbstractCegarLoop]: Abstraction has 1838 states and 4948 transitions. [2021-03-10 14:36:18,870 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 14:36:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 4948 transitions. [2021-03-10 14:36:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:18,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:18,871 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 14:36:19,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:19,087 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:19,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:19,088 INFO L82 PathProgramCache]: Analyzing trace with hash 671673730, now seen corresponding path program 4 times [2021-03-10 14:36:19,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:19,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415046365] [2021-03-10 14:36:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:19,149 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 14:36:19,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415046365] [2021-03-10 14:36:19,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035767442] [2021-03-10 14:36:19,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:19,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 14:36:19,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:19,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:19,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:19,329 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 14:36:19,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:19,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 14:36:19,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389996903] [2021-03-10 14:36:19,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 14:36:19,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:19,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 14:36:19,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 14:36:19,332 INFO L87 Difference]: Start difference. First operand 1838 states and 4948 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 14:36:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:19,716 INFO L93 Difference]: Finished difference Result 4574 states and 11912 transitions. [2021-03-10 14:36:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 14:36:19,717 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 14:36:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:19,722 INFO L225 Difference]: With dead ends: 4574 [2021-03-10 14:36:19,723 INFO L226 Difference]: Without dead ends: 3670 [2021-03-10 14:36:19,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 340.9ms TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 14:36:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2021-03-10 14:36:19,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2069. [2021-03-10 14:36:19,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.6832688588007736) internal successors, (5549), 2068 states have internal predecessors, (5549), 0 states have call successors, (0), 0 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 14:36:19,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 5549 transitions. [2021-03-10 14:36:19,761 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 5549 transitions. Word has length 41 [2021-03-10 14:36:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:19,761 INFO L480 AbstractCegarLoop]: Abstraction has 2069 states and 5549 transitions. [2021-03-10 14:36:19,761 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 14:36:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 5549 transitions. [2021-03-10 14:36:19,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:19,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:19,763 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 14:36:19,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 14:36:19,979 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:19,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2033165846, now seen corresponding path program 2 times [2021-03-10 14:36:19,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:19,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852432713] [2021-03-10 14:36:19,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:20,046 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 14:36:20,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852432713] [2021-03-10 14:36:20,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298929165] [2021-03-10 14:36:20,046 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 14:36:20,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:20,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:20,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:20,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:20,233 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 14:36:20,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:20,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 14:36:20,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14451170] [2021-03-10 14:36:20,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 14:36:20,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:20,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 14:36:20,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:20,235 INFO L87 Difference]: Start difference. First operand 2069 states and 5549 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 14:36:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:20,418 INFO L93 Difference]: Finished difference Result 3552 states and 9329 transitions. [2021-03-10 14:36:20,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 14:36:20,418 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 14:36:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:20,423 INFO L225 Difference]: With dead ends: 3552 [2021-03-10 14:36:20,423 INFO L226 Difference]: Without dead ends: 3188 [2021-03-10 14:36:20,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-03-10 14:36:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3188 states. [2021-03-10 14:36:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3188 to 2279. [2021-03-10 14:36:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 2.7036874451273047) internal successors, (6159), 2278 states have internal predecessors, (6159), 0 states have call successors, (0), 0 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 14:36:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 6159 transitions. [2021-03-10 14:36:20,464 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 6159 transitions. Word has length 46 [2021-03-10 14:36:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:20,464 INFO L480 AbstractCegarLoop]: Abstraction has 2279 states and 6159 transitions. [2021-03-10 14:36:20,465 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 14:36:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 6159 transitions. [2021-03-10 14:36:20,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:20,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:20,467 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 14:36:20,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 14:36:20,683 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:20,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1969614047, now seen corresponding path program 3 times [2021-03-10 14:36:20,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:20,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255747826] [2021-03-10 14:36:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:20,785 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 14:36:20,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255747826] [2021-03-10 14:36:20,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568294942] [2021-03-10 14:36:20,785 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 14:36:20,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 14:36:20,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:20,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 14:36:20,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:20,926 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 14:36:20,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:20,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-03-10 14:36:20,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521580613] [2021-03-10 14:36:20,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 14:36:20,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:20,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 14:36:20,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-10 14:36:20,928 INFO L87 Difference]: Start difference. First operand 2279 states and 6159 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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 14:36:21,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:21,026 INFO L93 Difference]: Finished difference Result 3217 states and 8396 transitions. [2021-03-10 14:36:21,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 14:36:21,027 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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 46 [2021-03-10 14:36:21,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:21,031 INFO L225 Difference]: With dead ends: 3217 [2021-03-10 14:36:21,031 INFO L226 Difference]: Without dead ends: 3065 [2021-03-10 14:36:21,032 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2021-03-10 14:36:21,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 2352. [2021-03-10 14:36:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.689919183326244) internal successors, (6324), 2351 states have internal predecessors, (6324), 0 states have call successors, (0), 0 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 14:36:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6324 transitions. [2021-03-10 14:36:21,070 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6324 transitions. Word has length 46 [2021-03-10 14:36:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:21,070 INFO L480 AbstractCegarLoop]: Abstraction has 2352 states and 6324 transitions. [2021-03-10 14:36:21,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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 14:36:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6324 transitions. [2021-03-10 14:36:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:21,073 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:21,073 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 14:36:21,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 14:36:21,288 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:21,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1876683179, now seen corresponding path program 4 times [2021-03-10 14:36:21,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:21,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773112885] [2021-03-10 14:36:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:21,352 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 14:36:21,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773112885] [2021-03-10 14:36:21,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554108341] [2021-03-10 14:36:21,352 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 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 14:36:21,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 14:36:21,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:21,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:21,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:21,620 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 14:36:21,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:21,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:21,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446486413] [2021-03-10 14:36:21,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:21,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:21,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:21,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:21,621 INFO L87 Difference]: Start difference. First operand 2352 states and 6324 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 14:36:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:21,941 INFO L93 Difference]: Finished difference Result 4060 states and 10675 transitions. [2021-03-10 14:36:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 14:36:21,941 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 14:36:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:21,946 INFO L225 Difference]: With dead ends: 4060 [2021-03-10 14:36:21,947 INFO L226 Difference]: Without dead ends: 3696 [2021-03-10 14:36:21,947 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-03-10 14:36:21,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2021-03-10 14:36:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 2370. [2021-03-10 14:36:21,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 2369 states have (on average 2.6964964119881807) internal successors, (6388), 2369 states have internal predecessors, (6388), 0 states have call successors, (0), 0 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 14:36:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 6388 transitions. [2021-03-10 14:36:21,981 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 6388 transitions. Word has length 46 [2021-03-10 14:36:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:21,981 INFO L480 AbstractCegarLoop]: Abstraction has 2370 states and 6388 transitions. [2021-03-10 14:36:21,981 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 14:36:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 6388 transitions. [2021-03-10 14:36:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:21,983 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:21,983 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 14:36:22,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:22,204 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:22,204 INFO L82 PathProgramCache]: Analyzing trace with hash -191070329, now seen corresponding path program 1 times [2021-03-10 14:36:22,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:22,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663385921] [2021-03-10 14:36:22,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:22,278 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 14:36:22,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663385921] [2021-03-10 14:36:22,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266754266] [2021-03-10 14:36:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:36:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:22,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:22,465 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 14:36:22,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:22,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:22,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287769423] [2021-03-10 14:36:22,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:22,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:22,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:22,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:22,467 INFO L87 Difference]: Start difference. First operand 2370 states and 6388 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 14:36:22,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:22,706 INFO L93 Difference]: Finished difference Result 3555 states and 9096 transitions. [2021-03-10 14:36:22,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 14:36:22,706 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 14:36:22,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:22,711 INFO L225 Difference]: With dead ends: 3555 [2021-03-10 14:36:22,712 INFO L226 Difference]: Without dead ends: 3403 [2021-03-10 14:36:22,712 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-03-10 14:36:22,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2021-03-10 14:36:22,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 2483. [2021-03-10 14:36:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.67566478646253) internal successors, (6641), 2482 states have internal predecessors, (6641), 0 states have call successors, (0), 0 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 14:36:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 6641 transitions. [2021-03-10 14:36:22,746 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 6641 transitions. Word has length 46 [2021-03-10 14:36:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:22,746 INFO L480 AbstractCegarLoop]: Abstraction has 2483 states and 6641 transitions. [2021-03-10 14:36:22,746 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 14:36:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 6641 transitions. [2021-03-10 14:36:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:22,749 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:22,749 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 14:36:22,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 14:36:22,959 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:22,959 INFO L82 PathProgramCache]: Analyzing trace with hash -898156419, now seen corresponding path program 2 times [2021-03-10 14:36:22,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:22,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061905334] [2021-03-10 14:36:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:23,017 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 14:36:23,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061905334] [2021-03-10 14:36:23,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498237624] [2021-03-10 14:36:23,017 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 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 14:36:23,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:23,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:23,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:23,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:23,211 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 14:36:23,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:23,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:23,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797158707] [2021-03-10 14:36:23,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:23,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:23,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:23,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:23,215 INFO L87 Difference]: Start difference. First operand 2483 states and 6641 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 14:36:23,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:23,487 INFO L93 Difference]: Finished difference Result 3884 states and 9862 transitions. [2021-03-10 14:36:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 14:36:23,488 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 14:36:23,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:23,492 INFO L225 Difference]: With dead ends: 3884 [2021-03-10 14:36:23,493 INFO L226 Difference]: Without dead ends: 3732 [2021-03-10 14:36:23,493 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 263.7ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-03-10 14:36:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2021-03-10 14:36:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 2456. [2021-03-10 14:36:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.704276985743381) internal successors, (6639), 2455 states have internal predecessors, (6639), 0 states have call successors, (0), 0 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 14:36:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6639 transitions. [2021-03-10 14:36:23,527 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6639 transitions. Word has length 46 [2021-03-10 14:36:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:23,527 INFO L480 AbstractCegarLoop]: Abstraction has 2456 states and 6639 transitions. [2021-03-10 14:36:23,527 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 14:36:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6639 transitions. [2021-03-10 14:36:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:23,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:23,529 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 14:36:23,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:23,743 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:23,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:23,744 INFO L82 PathProgramCache]: Analyzing trace with hash -64874149, now seen corresponding path program 3 times [2021-03-10 14:36:23,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:23,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136027121] [2021-03-10 14:36:23,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:23,811 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 14:36:23,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136027121] [2021-03-10 14:36:23,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217961965] [2021-03-10 14:36:23,811 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 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 14:36:23,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 14:36:23,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:23,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:23,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:23,987 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 14:36:23,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:23,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:23,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901416140] [2021-03-10 14:36:23,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:23,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:23,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:23,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:23,988 INFO L87 Difference]: Start difference. First operand 2456 states and 6639 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 14:36:24,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:24,309 INFO L93 Difference]: Finished difference Result 3715 states and 9712 transitions. [2021-03-10 14:36:24,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 14:36:24,309 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 14:36:24,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:24,313 INFO L225 Difference]: With dead ends: 3715 [2021-03-10 14:36:24,313 INFO L226 Difference]: Without dead ends: 3563 [2021-03-10 14:36:24,313 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 284.6ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-03-10 14:36:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-03-10 14:36:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2578. [2021-03-10 14:36:24,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2577 states have (on average 2.7167248738843615) internal successors, (7001), 2577 states have internal predecessors, (7001), 0 states have call successors, (0), 0 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 14:36:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 7001 transitions. [2021-03-10 14:36:24,346 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 7001 transitions. Word has length 46 [2021-03-10 14:36:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:24,346 INFO L480 AbstractCegarLoop]: Abstraction has 2578 states and 7001 transitions. [2021-03-10 14:36:24,346 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 14:36:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 7001 transitions. [2021-03-10 14:36:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:24,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:24,349 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 14:36:24,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 14:36:24,562 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:24,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:24,562 INFO L82 PathProgramCache]: Analyzing trace with hash -476267901, now seen corresponding path program 4 times [2021-03-10 14:36:24,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:24,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763036016] [2021-03-10 14:36:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:24,618 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 14:36:24,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763036016] [2021-03-10 14:36:24,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336792873] [2021-03-10 14:36:24,618 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 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 14:36:24,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 14:36:24,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:24,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:24,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:24,864 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 14:36:24,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:24,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:24,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312782499] [2021-03-10 14:36:24,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:24,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:24,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:24,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:24,872 INFO L87 Difference]: Start difference. First operand 2578 states and 7001 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 14:36:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:25,446 INFO L93 Difference]: Finished difference Result 5106 states and 13467 transitions. [2021-03-10 14:36:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 14:36:25,446 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 14:36:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:25,452 INFO L225 Difference]: With dead ends: 5106 [2021-03-10 14:36:25,452 INFO L226 Difference]: Without dead ends: 4572 [2021-03-10 14:36:25,453 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 494.3ms TimeCoverageRelationStatistics Valid=488, Invalid=1674, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 14:36:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4572 states. [2021-03-10 14:36:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4572 to 2506. [2021-03-10 14:36:25,491 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 14:36:25,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 6825 transitions. [2021-03-10 14:36:25,495 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 6825 transitions. Word has length 46 [2021-03-10 14:36:25,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:25,495 INFO L480 AbstractCegarLoop]: Abstraction has 2506 states and 6825 transitions. [2021-03-10 14:36:25,495 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 14:36:25,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 6825 transitions. [2021-03-10 14:36:25,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:25,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:25,498 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 14:36:25,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:25,715 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:25,715 INFO L82 PathProgramCache]: Analyzing trace with hash -790685570, now seen corresponding path program 5 times [2021-03-10 14:36:25,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:25,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353993360] [2021-03-10 14:36:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:25,804 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 14:36:25,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353993360] [2021-03-10 14:36:25,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134523053] [2021-03-10 14:36:25,804 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 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 14:36:25,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 14:36:25,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:25,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:25,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:26,002 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 14:36:26,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:26,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 14:36:26,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256260407] [2021-03-10 14:36:26,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 14:36:26,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:26,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 14:36:26,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-10 14:36:26,003 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 14:36:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:26,157 INFO L93 Difference]: Finished difference Result 3586 states and 9461 transitions. [2021-03-10 14:36:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 14:36:26,158 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 14:36:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:26,161 INFO L225 Difference]: With dead ends: 3586 [2021-03-10 14:36:26,161 INFO L226 Difference]: Without dead ends: 3434 [2021-03-10 14:36:26,162 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-03-10 14:36:26,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-03-10 14:36:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 2600. [2021-03-10 14:36:26,199 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 14:36:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 7071 transitions. [2021-03-10 14:36:26,203 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 7071 transitions. Word has length 51 [2021-03-10 14:36:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:26,203 INFO L480 AbstractCegarLoop]: Abstraction has 2600 states and 7071 transitions. [2021-03-10 14:36:26,203 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 14:36:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 7071 transitions. [2021-03-10 14:36:26,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:26,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:26,206 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 14:36:26,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 14:36:26,421 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:26,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:26,421 INFO L82 PathProgramCache]: Analyzing trace with hash -342015500, now seen corresponding path program 6 times [2021-03-10 14:36:26,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:26,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952462270] [2021-03-10 14:36:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:26,500 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 14:36:26,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952462270] [2021-03-10 14:36:26,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543835058] [2021-03-10 14:36:26,500 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 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 14:36:26,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 14:36:26,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:26,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 14:36:26,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:26,639 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 14:36:26,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:26,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 14:36:26,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116119225] [2021-03-10 14:36:26,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:26,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:26,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:26,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:26,641 INFO L87 Difference]: Start difference. First operand 2600 states and 7071 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:26,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:26,900 INFO L93 Difference]: Finished difference Result 4668 states and 12344 transitions. [2021-03-10 14:36:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 14:36:26,900 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 14:36:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:26,904 INFO L225 Difference]: With dead ends: 4668 [2021-03-10 14:36:26,904 INFO L226 Difference]: Without dead ends: 4304 [2021-03-10 14:36:26,904 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-03-10 14:36:26,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2021-03-10 14:36:26,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 2541. [2021-03-10 14:36:26,942 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 14:36:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 6902 transitions. [2021-03-10 14:36:26,945 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 6902 transitions. Word has length 51 [2021-03-10 14:36:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:26,946 INFO L480 AbstractCegarLoop]: Abstraction has 2541 states and 6902 transitions. [2021-03-10 14:36:26,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 6902 transitions. [2021-03-10 14:36:26,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:26,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:26,948 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 14:36:27,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 14:36:27,165 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:27,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:27,165 INFO L82 PathProgramCache]: Analyzing trace with hash -489773940, now seen corresponding path program 5 times [2021-03-10 14:36:27,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:27,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238300863] [2021-03-10 14:36:27,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:27,243 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 14:36:27,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238300863] [2021-03-10 14:36:27,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878225669] [2021-03-10 14:36:27,243 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 14:36:27,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 14:36:27,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:27,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:27,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:27,441 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 14:36:27,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:27,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 14:36:27,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441035830] [2021-03-10 14:36:27,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 14:36:27,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:27,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 14:36:27,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-10 14:36:27,442 INFO L87 Difference]: Start difference. First operand 2541 states and 6902 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 14:36:27,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:27,652 INFO L93 Difference]: Finished difference Result 3828 states and 9898 transitions. [2021-03-10 14:36:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 14:36:27,653 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 14:36:27,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:27,656 INFO L225 Difference]: With dead ends: 3828 [2021-03-10 14:36:27,656 INFO L226 Difference]: Without dead ends: 3676 [2021-03-10 14:36:27,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-03-10 14:36:27,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3676 states. [2021-03-10 14:36:27,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3676 to 2570. [2021-03-10 14:36:27,713 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 14:36:27,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 6975 transitions. [2021-03-10 14:36:27,717 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 6975 transitions. Word has length 51 [2021-03-10 14:36:27,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:27,717 INFO L480 AbstractCegarLoop]: Abstraction has 2570 states and 6975 transitions. [2021-03-10 14:36:27,717 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 14:36:27,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 6975 transitions. [2021-03-10 14:36:27,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:27,719 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:27,719 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 14:36:27,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 14:36:27,934 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:27,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:27,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1898056490, now seen corresponding path program 6 times [2021-03-10 14:36:27,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:27,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387237270] [2021-03-10 14:36:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:28,001 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 14:36:28,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387237270] [2021-03-10 14:36:28,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567016690] [2021-03-10 14:36:28,002 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 14:36:28,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 14:36:28,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:28,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 14:36:28,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:28,234 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 14:36:28,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:28,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 14:36:28,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576222652] [2021-03-10 14:36:28,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 14:36:28,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 14:36:28,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-10 14:36:28,236 INFO L87 Difference]: Start difference. First operand 2570 states and 6975 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 14:36:28,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:28,519 INFO L93 Difference]: Finished difference Result 3886 states and 10251 transitions. [2021-03-10 14:36:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 14:36:28,519 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 14:36:28,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:28,523 INFO L225 Difference]: With dead ends: 3886 [2021-03-10 14:36:28,523 INFO L226 Difference]: Without dead ends: 3734 [2021-03-10 14:36:28,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 292.2ms TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2021-03-10 14:36:28,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3734 states. [2021-03-10 14:36:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3734 to 2650. [2021-03-10 14:36:28,556 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 14:36:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2650 states to 2650 states and 7225 transitions. [2021-03-10 14:36:28,560 INFO L78 Accepts]: Start accepts. Automaton has 2650 states and 7225 transitions. Word has length 51 [2021-03-10 14:36:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:28,560 INFO L480 AbstractCegarLoop]: Abstraction has 2650 states and 7225 transitions. [2021-03-10 14:36:28,560 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 14:36:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2650 states and 7225 transitions. [2021-03-10 14:36:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:28,563 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:28,563 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 14:36:28,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 14:36:28,771 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:28,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:28,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1992536988, now seen corresponding path program 7 times [2021-03-10 14:36:28,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:28,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517956863] [2021-03-10 14:36:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:28,831 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 14:36:28,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517956863] [2021-03-10 14:36:28,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102843356] [2021-03-10 14:36:28,831 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 14:36:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:28,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:28,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:29,284 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 17 [2021-03-10 14:36:29,304 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 14:36:29,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:29,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 14:36:29,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514115925] [2021-03-10 14:36:29,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 14:36:29,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:29,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 14:36:29,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-10 14:36:29,305 INFO L87 Difference]: Start difference. First operand 2650 states and 7225 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 14:36:29,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:29,943 INFO L93 Difference]: Finished difference Result 5642 states and 14830 transitions. [2021-03-10 14:36:29,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 14:36:29,944 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 14:36:29,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:29,949 INFO L225 Difference]: With dead ends: 5642 [2021-03-10 14:36:29,949 INFO L226 Difference]: Without dead ends: 5102 [2021-03-10 14:36:29,950 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 787.4ms TimeCoverageRelationStatistics Valid=483, Invalid=1869, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 14:36:29,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5102 states. [2021-03-10 14:36:29,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5102 to 2570. [2021-03-10 14:36:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2569 states have (on average 2.7341377968080964) internal successors, (7024), 2569 states have internal predecessors, (7024), 0 states have call successors, (0), 0 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 14:36:29,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 7024 transitions. [2021-03-10 14:36:29,996 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 7024 transitions. Word has length 51 [2021-03-10 14:36:29,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:29,996 INFO L480 AbstractCegarLoop]: Abstraction has 2570 states and 7024 transitions. [2021-03-10 14:36:29,996 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 14:36:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 7024 transitions. [2021-03-10 14:36:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:29,999 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:29,999 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 14:36:30,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:30,216 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:30,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:30,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1343597350, now seen corresponding path program 8 times [2021-03-10 14:36:30,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:30,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705014076] [2021-03-10 14:36:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:30,298 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 14:36:30,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705014076] [2021-03-10 14:36:30,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546379498] [2021-03-10 14:36:30,299 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 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 14:36:30,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:30,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:30,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:30,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:30,491 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 14:36:30,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:30,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 14:36:30,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671501800] [2021-03-10 14:36:30,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 14:36:30,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:30,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 14:36:30,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-10 14:36:30,492 INFO L87 Difference]: Start difference. First operand 2570 states and 7024 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 14:36:30,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:30,799 INFO L93 Difference]: Finished difference Result 4122 states and 10561 transitions. [2021-03-10 14:36:30,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 14:36:30,799 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 14:36:30,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:30,803 INFO L225 Difference]: With dead ends: 4122 [2021-03-10 14:36:30,803 INFO L226 Difference]: Without dead ends: 3970 [2021-03-10 14:36:30,804 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-03-10 14:36:30,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2021-03-10 14:36:30,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 2635. [2021-03-10 14:36:30,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 2.7198177676537587) internal successors, (7164), 2634 states have internal predecessors, (7164), 0 states have call successors, (0), 0 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 14:36:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 7164 transitions. [2021-03-10 14:36:30,840 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 7164 transitions. Word has length 51 [2021-03-10 14:36:30,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:30,840 INFO L480 AbstractCegarLoop]: Abstraction has 2635 states and 7164 transitions. [2021-03-10 14:36:30,840 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 14:36:30,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 7164 transitions. [2021-03-10 14:36:30,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:30,843 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:30,843 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 14:36:31,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 14:36:31,057 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:31,057 INFO L82 PathProgramCache]: Analyzing trace with hash 636511260, now seen corresponding path program 9 times [2021-03-10 14:36:31,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:31,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141930926] [2021-03-10 14:36:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:31,123 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 14:36:31,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141930926] [2021-03-10 14:36:31,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360328844] [2021-03-10 14:36:31,124 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 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 14:36:31,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 14:36:31,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:31,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 14:36:31,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:31,317 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 14:36:31,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:31,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 14:36:31,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704931017] [2021-03-10 14:36:31,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 14:36:31,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:31,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 14:36:31,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:31,318 INFO L87 Difference]: Start difference. First operand 2635 states and 7164 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:31,677 INFO L93 Difference]: Finished difference Result 4564 states and 11644 transitions. [2021-03-10 14:36:31,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 14:36:31,677 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 14:36:31,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:31,683 INFO L225 Difference]: With dead ends: 4564 [2021-03-10 14:36:31,683 INFO L226 Difference]: Without dead ends: 4324 [2021-03-10 14:36:31,683 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 308.0ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 14:36:31,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-03-10 14:36:31,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 2735. [2021-03-10 14:36:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2735 states, 2734 states have (on average 2.7227505486466717) internal successors, (7444), 2734 states have internal predecessors, (7444), 0 states have call successors, (0), 0 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 14:36:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 7444 transitions. [2021-03-10 14:36:31,743 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 7444 transitions. Word has length 51 [2021-03-10 14:36:31,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:31,744 INFO L480 AbstractCegarLoop]: Abstraction has 2735 states and 7444 transitions. [2021-03-10 14:36:31,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:31,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 7444 transitions. [2021-03-10 14:36:31,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:31,750 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:31,750 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 14:36:31,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 14:36:31,966 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:31,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:31,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1469793530, now seen corresponding path program 10 times [2021-03-10 14:36:31,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:31,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582669364] [2021-03-10 14:36:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:32,031 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 14:36:32,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582669364] [2021-03-10 14:36:32,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035100338] [2021-03-10 14:36:32,032 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 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 14:36:32,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 14:36:32,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:32,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:32,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:32,252 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 14:36:32,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:32,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 14:36:32,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107327062] [2021-03-10 14:36:32,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 14:36:32,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:32,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 14:36:32,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-10 14:36:32,253 INFO L87 Difference]: Start difference. First operand 2735 states and 7444 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 14:36:32,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:32,678 INFO L93 Difference]: Finished difference Result 4707 states and 12355 transitions. [2021-03-10 14:36:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 14:36:32,678 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 14:36:32,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:32,682 INFO L225 Difference]: With dead ends: 4707 [2021-03-10 14:36:32,682 INFO L226 Difference]: Without dead ends: 4555 [2021-03-10 14:36:32,683 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 396.8ms TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 14:36:32,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4555 states. [2021-03-10 14:36:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4555 to 2800. [2021-03-10 14:36:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 2.7595569846373706) internal successors, (7724), 2799 states have internal predecessors, (7724), 0 states have call successors, (0), 0 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 14:36:32,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 7724 transitions. [2021-03-10 14:36:32,713 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 7724 transitions. Word has length 51 [2021-03-10 14:36:32,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:32,713 INFO L480 AbstractCegarLoop]: Abstraction has 2800 states and 7724 transitions. [2021-03-10 14:36:32,713 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 14:36:32,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 7724 transitions. [2021-03-10 14:36:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:32,715 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:32,716 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 14:36:32,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:32,923 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:32,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1058399778, now seen corresponding path program 11 times [2021-03-10 14:36:32,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:32,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188925282] [2021-03-10 14:36:32,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:32,987 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 14:36:32,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188925282] [2021-03-10 14:36:32,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100255817] [2021-03-10 14:36:32,987 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 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 14:36:33,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 14:36:33,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:33,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:33,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:47:23,908 WARN L340 FreeRefinementEngine]: Global settings require throwing the following exception [2021-03-10 14:47:24,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 14:47:24,131 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NegativeArraySizeException: -1097238550 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildDualFiniteJunction(DualJunctionTir.java:651) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildCorrespondingFiniteJunctionForAntiDer(DualJunctionTir.java:615) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildBoundConstraint(DualJunctionTir.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.access$2(DualJunctionTir.java:421) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateConjuncts(DualJunctionTir.java:205) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne(DualJunctionTir.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryExhaustivelyToEliminate(DualJunctionTir.java:125) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminate(DualJunctionTir.java:112) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:862) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:828) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:746) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:383) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:315) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:464) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:315) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:602) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:404) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:315) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-03-10 14:47:24,135 INFO L168 Benchmark]: Toolchain (without parser) took 671929.27 ms. Allocated memory was 404.8 MB in the beginning and 15.3 GB in the end (delta: 14.9 GB). Free memory was 368.4 MB in the beginning and 9.5 GB in the end (delta: -9.2 GB). Peak memory consumption was 12.2 GB. Max. memory is 16.0 GB. [2021-03-10 14:47:24,135 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 404.8 MB. Free memory was 386.4 MB in the beginning and 386.3 MB in the end (delta: 75.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 14:47:24,135 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.77 ms. Allocated memory is still 404.8 MB. Free memory was 367.8 MB in the beginning and 369.7 MB in the end (delta: -1.9 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.0 GB. [2021-03-10 14:47:24,135 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.03 ms. Allocated memory is still 404.8 MB. Free memory was 369.7 MB in the beginning and 367.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 14:47:24,135 INFO L168 Benchmark]: Boogie Preprocessor took 30.66 ms. Allocated memory is still 404.8 MB. Free memory was 367.6 MB in the beginning and 366.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 14:47:24,135 INFO L168 Benchmark]: RCFGBuilder took 332.23 ms. Allocated memory is still 404.8 MB. Free memory was 366.6 MB in the beginning and 343.5 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-03-10 14:47:24,135 INFO L168 Benchmark]: TraceAbstraction took 671171.28 ms. Allocated memory was 404.8 MB in the beginning and 15.3 GB in the end (delta: 14.9 GB). Free memory was 342.5 MB in the beginning and 9.5 GB in the end (delta: -9.2 GB). Peak memory consumption was 12.2 GB. Max. memory is 16.0 GB. [2021-03-10 14:47:24,135 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 404.8 MB. Free memory was 386.4 MB in the beginning and 386.3 MB in the end (delta: 75.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 348.77 ms. Allocated memory is still 404.8 MB. Free memory was 367.8 MB in the beginning and 369.7 MB in the end (delta: -1.9 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 40.03 ms. Allocated memory is still 404.8 MB. Free memory was 369.7 MB in the beginning and 367.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 30.66 ms. Allocated memory is still 404.8 MB. Free memory was 367.6 MB in the beginning and 366.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 332.23 ms. Allocated memory is still 404.8 MB. Free memory was 366.6 MB in the beginning and 343.5 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 671171.28 ms. Allocated memory was 404.8 MB in the beginning and 15.3 GB in the end (delta: 14.9 GB). Free memory was 342.5 MB in the beginning and 9.5 GB in the end (delta: -9.2 GB). Peak memory consumption was 12.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NegativeArraySizeException: -1097238550 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NegativeArraySizeException: -1097238550: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildDualFiniteJunction(DualJunctionTir.java:651) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...