/usr/bin/java -Xmx8000000000 -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-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 18:17:19,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 18:17:19,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 18:17:20,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-13 18:17:20,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-13 18:17:20,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-13 18:17:20,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-13 18:17:20,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-13 18:17:20,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-13 18:17:20,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-13 18:17:20,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-13 18:17:20,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-13 18:17:20,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 18:17:20,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 18:17:20,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 18:17:20,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 18:17:20,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 18:17:20,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 18:17:20,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 18:17:20,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 18:17:20,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 18:17:20,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 18:17:20,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 18:17:20,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 18:17:20,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 18:17:20,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 18:17:20,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 18:17:20,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 18:17:20,054 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 [2021-07-13 18:17:20,093 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 18:17:20,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 18:17:20,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 18:17:20,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 18:17:20,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 18:17:20,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 18:17:20,097 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 18:17:20,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 18:17:20,097 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 18:17:20,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 18:17:20,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 18:17:20,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 18:17:20,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 18:17:20,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 18:17:20,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 18:17:20,099 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 18:17:20,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 18:17:20,099 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 18:17:20,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 18:17:20,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 18:17:20,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 18:17:20,100 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 18:17:20,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 18:17:20,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 18:17:20,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 18:17:20,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 18:17:20,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 18:17:20,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 18:17:20,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 18:17:20,101 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 18:17:20,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 18:17:20,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 18:17:20,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 18:17:20,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 18:17:20,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 18:17:20,433 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-13 18:17:20,437 INFO L275 PluginConnector]: CDTParser initialized [2021-07-13 18:17:20,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-07-13 18:17:20,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23f42f719/54bdc0ef1f3c4b019f7eb23caaa27f21/FLAG479868114 [2021-07-13 18:17:21,026 INFO L306 CDTParser]: Found 1 translation units. [2021-07-13 18:17:21,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-07-13 18:17:21,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23f42f719/54bdc0ef1f3c4b019f7eb23caaa27f21/FLAG479868114 [2021-07-13 18:17:21,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23f42f719/54bdc0ef1f3c4b019f7eb23caaa27f21 [2021-07-13 18:17:21,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 18:17:21,520 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-13 18:17:21,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-13 18:17:21,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-13 18:17:21,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-13 18:17:21,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:17:21" (1/1) ... [2021-07-13 18:17:21,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678fadb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:17:21, skipping insertion in model container [2021-07-13 18:17:21,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:17:21" (1/1) ... [2021-07-13 18:17:21,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-13 18:17:21,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-13 18:17:21,874 WARN L224 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] [2021-07-13 18:17:21,894 WARN L224 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] [2021-07-13 18:17:21,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:17:21,904 INFO L203 MainTranslator]: Completed pre-run [2021-07-13 18:17:21,946 WARN L224 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] [2021-07-13 18:17:21,963 WARN L224 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] [2021-07-13 18:17:21,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:17:22,002 INFO L208 MainTranslator]: Completed translation [2021-07-13 18:17:22,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:17:22 WrapperNode [2021-07-13 18:17:22,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-13 18:17:22,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 18:17:22,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 18:17:22,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 18:17:22,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:17:22" (1/1) ... [2021-07-13 18:17:22,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:17:22" (1/1) ... [2021-07-13 18:17:22,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 18:17:22,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 18:17:22,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 18:17:22,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 18:17:22,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:17:22" (1/1) ... [2021-07-13 18:17:22,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:17:22" (1/1) ... [2021-07-13 18:17:22,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:17:22" (1/1) ... [2021-07-13 18:17:22,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:17:22" (1/1) ... [2021-07-13 18:17:22,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:17:22" (1/1) ... [2021-07-13 18:17:22,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:17:22" (1/1) ... [2021-07-13 18:17:22,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:17:22" (1/1) ... [2021-07-13 18:17:22,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 18:17:22,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 18:17:22,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 18:17:22,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 18:17:22,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:17:22" (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 [2021-07-13 18:17:22,142 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-13 18:17:22,142 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-13 18:17:22,142 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-13 18:17:22,143 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-13 18:17:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-13 18:17:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-07-13 18:17:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-13 18:17:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-13 18:17:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-13 18:17:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-07-13 18:17:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 18:17:22,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 18:17:22,145 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 18:17:22,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 18:17:22,553 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-13 18:17:22,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:17:22 BoogieIcfgContainer [2021-07-13 18:17:22,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 18:17:22,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 18:17:22,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 18:17:22,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 18:17:22,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:17:21" (1/3) ... [2021-07-13 18:17:22,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fae2952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:17:22, skipping insertion in model container [2021-07-13 18:17:22,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:17:22" (2/3) ... [2021-07-13 18:17:22,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fae2952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:17:22, skipping insertion in model container [2021-07-13 18:17:22,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:17:22" (3/3) ... [2021-07-13 18:17:22,562 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2021-07-13 18:17:22,567 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 18:17:22,568 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 18:17:22,568 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 18:17:22,568 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 18:17:22,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,602 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,602 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,602 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,602 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,602 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,602 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,603 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,603 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,603 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,603 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,604 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,604 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,604 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,604 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,604 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,604 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,604 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,605 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,605 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,606 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,606 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,606 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,606 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,606 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,606 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,607 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,607 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,607 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,608 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,609 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,609 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,609 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,609 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,609 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,609 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,610 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,610 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,611 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,611 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,611 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,611 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,611 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,611 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,612 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,614 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,614 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,615 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,615 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,617 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,617 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,618 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,618 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,618 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,618 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,624 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,624 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,625 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,627 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-13 18:17:22,651 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 18:17:22,685 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:17:22,685 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:17:22,686 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:17:22,686 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:17:22,686 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:17:22,686 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:17:22,686 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:17:22,686 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 18:17:22,699 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-07-13 18:17:22,768 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:22,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:22,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 18:17:22,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:22,784 INFO L508 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] [2021-07-13 18:17:22,784 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:22,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1746009969, now seen corresponding path program 1 times [2021-07-13 18:17:22,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:22,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232442339] [2021-07-13 18:17:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:23,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:23,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232442339] [2021-07-13 18:17:23,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232442339] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:17:23,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:17:23,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 18:17:23,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589108829] [2021-07-13 18:17:23,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 18:17:23,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:23,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 18:17:23,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:17:23,136 INFO L87 Difference]: Start difference. First operand has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:23,276 INFO L93 Difference]: Finished difference Result 1756 states and 4724 transitions. [2021-07-13 18:17:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 18:17:23,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 18:17:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:23,307 INFO L225 Difference]: With dead ends: 1756 [2021-07-13 18:17:23,307 INFO L226 Difference]: Without dead ends: 1425 [2021-07-13 18:17:23,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:17:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-07-13 18:17:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-07-13 18:17:23,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.7184986595174263) internal successors, (3042), 1119 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-07-13 18:17:23,435 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-07-13 18:17:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:23,435 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-07-13 18:17:23,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:23,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-07-13 18:17:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 18:17:23,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:23,444 INFO L508 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, 1] [2021-07-13 18:17:23,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 18:17:23,444 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:23,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1710770003, now seen corresponding path program 1 times [2021-07-13 18:17:23,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:23,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205114448] [2021-07-13 18:17:23,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:23,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:23,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205114448] [2021-07-13 18:17:23,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205114448] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:17:23,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:17:23,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 18:17:23,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801131363] [2021-07-13 18:17:23,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 18:17:23,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:23,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 18:17:23,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:17:23,624 INFO L87 Difference]: Start difference. First operand 1120 states and 3042 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:23,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:23,756 INFO L93 Difference]: Finished difference Result 2001 states and 5364 transitions. [2021-07-13 18:17:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 18:17:23,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 18:17:23,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:23,776 INFO L225 Difference]: With dead ends: 2001 [2021-07-13 18:17:23,777 INFO L226 Difference]: Without dead ends: 1670 [2021-07-13 18:17:23,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 18:17:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-07-13 18:17:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1304. [2021-07-13 18:17:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 2.7206446661550268) internal successors, (3545), 1303 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 3545 transitions. [2021-07-13 18:17:23,876 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 3545 transitions. Word has length 37 [2021-07-13 18:17:23,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:23,893 INFO L482 AbstractCegarLoop]: Abstraction has 1304 states and 3545 transitions. [2021-07-13 18:17:23,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 3545 transitions. [2021-07-13 18:17:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 18:17:23,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:23,896 INFO L508 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, 1] [2021-07-13 18:17:23,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 18:17:23,896 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:23,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:23,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1534224383, now seen corresponding path program 1 times [2021-07-13 18:17:23,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:23,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777800891] [2021-07-13 18:17:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:24,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:24,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777800891] [2021-07-13 18:17:24,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777800891] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:17:24,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:17:24,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 18:17:24,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270501011] [2021-07-13 18:17:24,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 18:17:24,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:24,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 18:17:24,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:17:24,044 INFO L87 Difference]: Start difference. First operand 1304 states and 3545 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:24,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:24,172 INFO L93 Difference]: Finished difference Result 2270 states and 6052 transitions. [2021-07-13 18:17:24,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 18:17:24,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 18:17:24,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:24,185 INFO L225 Difference]: With dead ends: 2270 [2021-07-13 18:17:24,186 INFO L226 Difference]: Without dead ends: 2003 [2021-07-13 18:17:24,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 18:17:24,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-07-13 18:17:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1514. [2021-07-13 18:17:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 2.701916721744878) internal successors, (4088), 1513 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-07-13 18:17:24,274 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-07-13 18:17:24,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:24,275 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-07-13 18:17:24,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:24,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-07-13 18:17:24,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 18:17:24,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:24,280 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:24,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 18:17:24,280 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:24,282 INFO L82 PathProgramCache]: Analyzing trace with hash 628492421, now seen corresponding path program 1 times [2021-07-13 18:17:24,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:24,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329508544] [2021-07-13 18:17:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:24,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:24,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329508544] [2021-07-13 18:17:24,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329508544] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:17:24,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:17:24,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 18:17:24,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727440844] [2021-07-13 18:17:24,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 18:17:24,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:24,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 18:17:24,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-13 18:17:24,464 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:24,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:24,692 INFO L93 Difference]: Finished difference Result 2827 states and 7572 transitions. [2021-07-13 18:17:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 18:17:24,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 18:17:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:24,710 INFO L225 Difference]: With dead ends: 2827 [2021-07-13 18:17:24,710 INFO L226 Difference]: Without dead ends: 2381 [2021-07-13 18:17:24,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 156.7ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:17:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-07-13 18:17:24,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1701. [2021-07-13 18:17:24,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.72) internal successors, (4624), 1700 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:24,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 4624 transitions. [2021-07-13 18:17:24,770 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 4624 transitions. Word has length 42 [2021-07-13 18:17:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:24,772 INFO L482 AbstractCegarLoop]: Abstraction has 1701 states and 4624 transitions. [2021-07-13 18:17:24,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:24,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 4624 transitions. [2021-07-13 18:17:24,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 18:17:24,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:24,775 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:24,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 18:17:24,775 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:24,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:24,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1458436131, now seen corresponding path program 2 times [2021-07-13 18:17:24,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:24,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109325117] [2021-07-13 18:17:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:24,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:24,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109325117] [2021-07-13 18:17:24,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109325117] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:17:24,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:17:24,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 18:17:24,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21320258] [2021-07-13 18:17:24,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 18:17:24,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:24,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 18:17:24,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 18:17:24,912 INFO L87 Difference]: Start difference. First operand 1701 states and 4624 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:24,998 INFO L93 Difference]: Finished difference Result 2480 states and 6588 transitions. [2021-07-13 18:17:24,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 18:17:24,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 18:17:24,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:25,011 INFO L225 Difference]: With dead ends: 2480 [2021-07-13 18:17:25,011 INFO L226 Difference]: Without dead ends: 2328 [2021-07-13 18:17:25,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:17:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-13 18:17:25,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1731. [2021-07-13 18:17:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.707514450867052) internal successors, (4684), 1730 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 4684 transitions. [2021-07-13 18:17:25,084 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 4684 transitions. Word has length 42 [2021-07-13 18:17:25,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:25,085 INFO L482 AbstractCegarLoop]: Abstraction has 1731 states and 4684 transitions. [2021-07-13 18:17:25,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:25,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 4684 transitions. [2021-07-13 18:17:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 18:17:25,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:25,088 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:25,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 18:17:25,088 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:25,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:25,089 INFO L82 PathProgramCache]: Analyzing trace with hash 695993441, now seen corresponding path program 3 times [2021-07-13 18:17:25,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:25,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619092262] [2021-07-13 18:17:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:25,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:25,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619092262] [2021-07-13 18:17:25,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619092262] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:17:25,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:17:25,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 18:17:25,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043574340] [2021-07-13 18:17:25,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 18:17:25,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:25,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 18:17:25,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 18:17:25,166 INFO L87 Difference]: Start difference. First operand 1731 states and 4684 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:25,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:25,333 INFO L93 Difference]: Finished difference Result 3149 states and 8380 transitions. [2021-07-13 18:17:25,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 18:17:25,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 18:17:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:25,349 INFO L225 Difference]: With dead ends: 3149 [2021-07-13 18:17:25,349 INFO L226 Difference]: Without dead ends: 2834 [2021-07-13 18:17:25,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:17:25,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-07-13 18:17:25,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1941. [2021-07-13 18:17:25,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.6943298969072167) internal successors, (5227), 1940 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5227 transitions. [2021-07-13 18:17:25,413 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5227 transitions. Word has length 42 [2021-07-13 18:17:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:25,414 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 5227 transitions. [2021-07-13 18:17:25,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5227 transitions. [2021-07-13 18:17:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 18:17:25,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:25,419 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:25,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 18:17:25,419 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:25,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1827767716, now seen corresponding path program 1 times [2021-07-13 18:17:25,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:25,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501858540] [2021-07-13 18:17:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:25,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:25,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501858540] [2021-07-13 18:17:25,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501858540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:25,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698968579] [2021-07-13 18:17:25,546 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 [2021-07-13 18:17:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:25,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:17:25,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:26,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698968579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:26,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:26,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 18:17:26,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580597805] [2021-07-13 18:17:26,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:17:26,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:26,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:17:26,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:17:26,042 INFO L87 Difference]: Start difference. First operand 1941 states and 5227 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:26,429 INFO L93 Difference]: Finished difference Result 4266 states and 11356 transitions. [2021-07-13 18:17:26,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:17:26,431 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 47 [2021-07-13 18:17:26,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:26,448 INFO L225 Difference]: With dead ends: 4266 [2021-07-13 18:17:26,449 INFO L226 Difference]: Without dead ends: 3529 [2021-07-13 18:17:26,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:17:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2021-07-13 18:17:26,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 2150. [2021-07-13 18:17:26,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 2.7240577012563985) internal successors, (5854), 2149 states have internal predecessors, (5854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 5854 transitions. [2021-07-13 18:17:26,529 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 5854 transitions. Word has length 47 [2021-07-13 18:17:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:26,529 INFO L482 AbstractCegarLoop]: Abstraction has 2150 states and 5854 transitions. [2021-07-13 18:17:26,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:26,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 5854 transitions. [2021-07-13 18:17:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 18:17:26,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:26,533 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:26,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-13 18:17:26,756 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:26,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:26,757 INFO L82 PathProgramCache]: Analyzing trace with hash 129141136, now seen corresponding path program 2 times [2021-07-13 18:17:26,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:26,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893242023] [2021-07-13 18:17:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:26,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:26,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893242023] [2021-07-13 18:17:26,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893242023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:26,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338929298] [2021-07-13 18:17:26,859 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 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 [2021-07-13 18:17:26,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:17:26,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:26,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:17:26,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:27,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338929298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:27,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:27,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 18:17:27,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645274201] [2021-07-13 18:17:27,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:17:27,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:27,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:17:27,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:17:27,150 INFO L87 Difference]: Start difference. First operand 2150 states and 5854 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:27,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:27,375 INFO L93 Difference]: Finished difference Result 3549 states and 9211 transitions. [2021-07-13 18:17:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 18:17:27,376 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 47 [2021-07-13 18:17:27,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:27,398 INFO L225 Difference]: With dead ends: 3549 [2021-07-13 18:17:27,399 INFO L226 Difference]: Without dead ends: 3157 [2021-07-13 18:17:27,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:17:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-07-13 18:17:27,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 2260. [2021-07-13 18:17:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2259 states have (on average 2.691013722886233) internal successors, (6079), 2259 states have internal predecessors, (6079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 6079 transitions. [2021-07-13 18:17:27,512 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 6079 transitions. Word has length 47 [2021-07-13 18:17:27,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:27,512 INFO L482 AbstractCegarLoop]: Abstraction has 2260 states and 6079 transitions. [2021-07-13 18:17:27,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 6079 transitions. [2021-07-13 18:17:27,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 18:17:27,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:27,517 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:27,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:27,733 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:27,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:27,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1467133920, now seen corresponding path program 3 times [2021-07-13 18:17:27,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:27,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816108423] [2021-07-13 18:17:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:27,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:27,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816108423] [2021-07-13 18:17:27,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816108423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:27,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307884820] [2021-07-13 18:17:27,844 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 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 [2021-07-13 18:17:27,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 18:17:27,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:27,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:17:27,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:28,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307884820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:28,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:28,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 18:17:28,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70333427] [2021-07-13 18:17:28,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:17:28,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:28,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:17:28,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:17:28,140 INFO L87 Difference]: Start difference. First operand 2260 states and 6079 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:28,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:28,474 INFO L93 Difference]: Finished difference Result 4390 states and 11364 transitions. [2021-07-13 18:17:28,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:17:28,475 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 47 [2021-07-13 18:17:28,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:28,487 INFO L225 Difference]: With dead ends: 4390 [2021-07-13 18:17:28,488 INFO L226 Difference]: Without dead ends: 3998 [2021-07-13 18:17:28,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:17:28,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3998 states. [2021-07-13 18:17:28,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3998 to 2423. [2021-07-13 18:17:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.7345169281585466) internal successors, (6623), 2422 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6623 transitions. [2021-07-13 18:17:28,578 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6623 transitions. Word has length 47 [2021-07-13 18:17:28,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:28,579 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 6623 transitions. [2021-07-13 18:17:28,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:28,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6623 transitions. [2021-07-13 18:17:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 18:17:28,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:28,583 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:28,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 18:17:28,797 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:28,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:28,797 INFO L82 PathProgramCache]: Analyzing trace with hash -480898396, now seen corresponding path program 4 times [2021-07-13 18:17:28,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:28,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682536167] [2021-07-13 18:17:28,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:28,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:28,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682536167] [2021-07-13 18:17:28,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682536167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:28,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487674767] [2021-07-13 18:17:28,874 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 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 [2021-07-13 18:17:28,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:17:28,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:28,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:17:28,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:29,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487674767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:29,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:29,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 18:17:29,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430282085] [2021-07-13 18:17:29,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:17:29,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:29,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:17:29,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:17:29,110 INFO L87 Difference]: Start difference. First operand 2423 states and 6623 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:29,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:29,707 INFO L93 Difference]: Finished difference Result 5771 states and 15228 transitions. [2021-07-13 18:17:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 18:17:29,708 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 47 [2021-07-13 18:17:29,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:29,721 INFO L225 Difference]: With dead ends: 5771 [2021-07-13 18:17:29,721 INFO L226 Difference]: Without dead ends: 4898 [2021-07-13 18:17:29,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 495.3ms TimeCoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:17:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-07-13 18:17:29,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2817. [2021-07-13 18:17:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.7169744318181817) internal successors, (7651), 2816 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:29,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 7651 transitions. [2021-07-13 18:17:29,803 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 7651 transitions. Word has length 47 [2021-07-13 18:17:29,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:29,803 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 7651 transitions. [2021-07-13 18:17:29,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:29,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 7651 transitions. [2021-07-13 18:17:29,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 18:17:29,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:29,809 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:30,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:30,033 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:30,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:30,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1211930671, now seen corresponding path program 5 times [2021-07-13 18:17:30,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:30,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173932840] [2021-07-13 18:17:30,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:30,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:30,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173932840] [2021-07-13 18:17:30,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173932840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:30,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330006540] [2021-07-13 18:17:30,125 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 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 [2021-07-13 18:17:30,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 18:17:30,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:30,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:17:30,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:30,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330006540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:30,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:30,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 18:17:30,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819562402] [2021-07-13 18:17:30,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:17:30,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:30,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:17:30,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:17:30,380 INFO L87 Difference]: Start difference. First operand 2817 states and 7651 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:30,610 INFO L93 Difference]: Finished difference Result 4116 states and 10667 transitions. [2021-07-13 18:17:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 18:17:30,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 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 52 [2021-07-13 18:17:30,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:30,620 INFO L225 Difference]: With dead ends: 4116 [2021-07-13 18:17:30,620 INFO L226 Difference]: Without dead ends: 3964 [2021-07-13 18:17:30,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:17:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3964 states. [2021-07-13 18:17:30,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3964 to 2842. [2021-07-13 18:17:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.7124252023935234) internal successors, (7706), 2841 states have internal predecessors, (7706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 7706 transitions. [2021-07-13 18:17:30,688 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 7706 transitions. Word has length 52 [2021-07-13 18:17:30,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:30,688 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 7706 transitions. [2021-07-13 18:17:30,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 7706 transitions. [2021-07-13 18:17:30,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 18:17:30,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:30,693 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:30,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:30,909 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:30,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:30,909 INFO L82 PathProgramCache]: Analyzing trace with hash 126062113, now seen corresponding path program 6 times [2021-07-13 18:17:30,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:30,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111804435] [2021-07-13 18:17:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:31,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:31,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111804435] [2021-07-13 18:17:31,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111804435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:31,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909418979] [2021-07-13 18:17:31,007 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 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 [2021-07-13 18:17:31,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 18:17:31,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:31,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:17:31,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:31,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909418979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:31,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:31,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 18:17:31,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704659978] [2021-07-13 18:17:31,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:17:31,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:31,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:17:31,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:17:31,260 INFO L87 Difference]: Start difference. First operand 2842 states and 7706 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:31,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:31,669 INFO L93 Difference]: Finished difference Result 4933 states and 12980 transitions. [2021-07-13 18:17:31,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:17:31,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 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 52 [2021-07-13 18:17:31,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:31,682 INFO L225 Difference]: With dead ends: 4933 [2021-07-13 18:17:31,682 INFO L226 Difference]: Without dead ends: 4629 [2021-07-13 18:17:31,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:17:31,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2021-07-13 18:17:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 3037. [2021-07-13 18:17:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3037 states, 3036 states have (on average 2.745718050065876) internal successors, (8336), 3036 states have internal predecessors, (8336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3037 states to 3037 states and 8336 transitions. [2021-07-13 18:17:31,766 INFO L78 Accepts]: Start accepts. Automaton has 3037 states and 8336 transitions. Word has length 52 [2021-07-13 18:17:31,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:31,766 INFO L482 AbstractCegarLoop]: Abstraction has 3037 states and 8336 transitions. [2021-07-13 18:17:31,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:31,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3037 states and 8336 transitions. [2021-07-13 18:17:31,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 18:17:31,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:31,777 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:32,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:32,002 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:32,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1821970203, now seen corresponding path program 7 times [2021-07-13 18:17:32,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:32,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613210091] [2021-07-13 18:17:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:32,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:32,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613210091] [2021-07-13 18:17:32,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613210091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:32,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344290452] [2021-07-13 18:17:32,084 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 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 [2021-07-13 18:17:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:17:32,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:32,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344290452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:32,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:32,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 18:17:32,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732235794] [2021-07-13 18:17:32,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:17:32,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:32,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:17:32,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:17:32,322 INFO L87 Difference]: Start difference. First operand 3037 states and 8336 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:32,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:32,935 INFO L93 Difference]: Finished difference Result 6026 states and 16276 transitions. [2021-07-13 18:17:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 18:17:32,936 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 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 52 [2021-07-13 18:17:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:32,949 INFO L225 Difference]: With dead ends: 6026 [2021-07-13 18:17:32,950 INFO L226 Difference]: Without dead ends: 5350 [2021-07-13 18:17:32,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 546.8ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:17:32,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5350 states. [2021-07-13 18:17:33,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5350 to 3186. [2021-07-13 18:17:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 2.778335949764521) internal successors, (8849), 3185 states have internal predecessors, (8849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:33,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 8849 transitions. [2021-07-13 18:17:33,033 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 8849 transitions. Word has length 52 [2021-07-13 18:17:33,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:33,033 INFO L482 AbstractCegarLoop]: Abstraction has 3186 states and 8849 transitions. [2021-07-13 18:17:33,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:33,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 8849 transitions. [2021-07-13 18:17:33,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 18:17:33,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:33,039 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:33,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:33,263 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:33,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:33,264 INFO L82 PathProgramCache]: Analyzing trace with hash -737531317, now seen corresponding path program 1 times [2021-07-13 18:17:33,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:33,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320338415] [2021-07-13 18:17:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:33,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:33,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320338415] [2021-07-13 18:17:33,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320338415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:33,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087762217] [2021-07-13 18:17:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 18:17:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:33,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:17:33,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:33,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087762217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:33,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:33,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 18:17:33,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17366192] [2021-07-13 18:17:33,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:17:33,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:33,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:17:33,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:17:33,641 INFO L87 Difference]: Start difference. First operand 3186 states and 8849 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:33,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:33,906 INFO L93 Difference]: Finished difference Result 4617 states and 12244 transitions. [2021-07-13 18:17:33,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 18:17:33,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 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 52 [2021-07-13 18:17:33,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:33,922 INFO L225 Difference]: With dead ends: 4617 [2021-07-13 18:17:33,922 INFO L226 Difference]: Without dead ends: 4465 [2021-07-13 18:17:33,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:17:33,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4465 states. [2021-07-13 18:17:33,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4465 to 3236. [2021-07-13 18:17:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 3235 states have (on average 2.7693972179289026) internal successors, (8959), 3235 states have internal predecessors, (8959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 8959 transitions. [2021-07-13 18:17:34,003 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 8959 transitions. Word has length 52 [2021-07-13 18:17:34,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:34,003 INFO L482 AbstractCegarLoop]: Abstraction has 3236 states and 8959 transitions. [2021-07-13 18:17:34,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:34,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 8959 transitions. [2021-07-13 18:17:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 18:17:34,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:34,009 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:34,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 18:17:34,225 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:34,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:34,225 INFO L82 PathProgramCache]: Analyzing trace with hash -264203099, now seen corresponding path program 2 times [2021-07-13 18:17:34,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:34,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534751999] [2021-07-13 18:17:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:34,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:34,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534751999] [2021-07-13 18:17:34,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534751999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:34,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014034786] [2021-07-13 18:17:34,308 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 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 [2021-07-13 18:17:34,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:17:34,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:34,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:17:34,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:34,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014034786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:34,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:34,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 18:17:34,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567611000] [2021-07-13 18:17:34,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:17:34,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:34,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:17:34,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:17:34,566 INFO L87 Difference]: Start difference. First operand 3236 states and 8959 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:34,760 INFO L93 Difference]: Finished difference Result 4457 states and 11924 transitions. [2021-07-13 18:17:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 18:17:34,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 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 52 [2021-07-13 18:17:34,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:34,771 INFO L225 Difference]: With dead ends: 4457 [2021-07-13 18:17:34,771 INFO L226 Difference]: Without dead ends: 4305 [2021-07-13 18:17:34,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:17:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-07-13 18:17:34,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3235. [2021-07-13 18:17:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3234 states have (on average 2.7680890538033394) internal successors, (8952), 3234 states have internal predecessors, (8952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 8952 transitions. [2021-07-13 18:17:34,856 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 8952 transitions. Word has length 52 [2021-07-13 18:17:34,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:34,857 INFO L482 AbstractCegarLoop]: Abstraction has 3235 states and 8952 transitions. [2021-07-13 18:17:34,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:34,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 8952 transitions. [2021-07-13 18:17:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 18:17:34,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:34,862 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:35,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:35,077 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:35,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:35,077 INFO L82 PathProgramCache]: Analyzing trace with hash -817398155, now seen corresponding path program 3 times [2021-07-13 18:17:35,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:35,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779431920] [2021-07-13 18:17:35,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:35,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:35,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779431920] [2021-07-13 18:17:35,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779431920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:35,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916747864] [2021-07-13 18:17:35,168 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 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 [2021-07-13 18:17:35,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 18:17:35,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:35,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:17:35,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:35,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916747864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:35,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:35,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 18:17:35,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811402284] [2021-07-13 18:17:35,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:17:35,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:35,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:17:35,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:17:35,424 INFO L87 Difference]: Start difference. First operand 3235 states and 8952 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:35,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:35,819 INFO L93 Difference]: Finished difference Result 5327 states and 14287 transitions. [2021-07-13 18:17:35,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:17:35,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 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 52 [2021-07-13 18:17:35,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:35,830 INFO L225 Difference]: With dead ends: 5327 [2021-07-13 18:17:35,830 INFO L226 Difference]: Without dead ends: 5175 [2021-07-13 18:17:35,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 367.3ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:17:35,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5175 states. [2021-07-13 18:17:35,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5175 to 3363. [2021-07-13 18:17:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 2.796252230814991) internal successors, (9401), 3362 states have internal predecessors, (9401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 9401 transitions. [2021-07-13 18:17:35,946 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 9401 transitions. Word has length 52 [2021-07-13 18:17:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:35,946 INFO L482 AbstractCegarLoop]: Abstraction has 3363 states and 9401 transitions. [2021-07-13 18:17:35,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 9401 transitions. [2021-07-13 18:17:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 18:17:35,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:35,952 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:36,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:36,173 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:36,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:36,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1529536825, now seen corresponding path program 4 times [2021-07-13 18:17:36,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:36,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960942949] [2021-07-13 18:17:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:36,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:36,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960942949] [2021-07-13 18:17:36,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960942949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:36,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360283082] [2021-07-13 18:17:36,252 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 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 [2021-07-13 18:17:36,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:17:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:36,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:17:36,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:36,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360283082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:36,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:36,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 18:17:36,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782065454] [2021-07-13 18:17:36,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:17:36,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:36,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:17:36,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:17:36,481 INFO L87 Difference]: Start difference. First operand 3363 states and 9401 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:37,096 INFO L93 Difference]: Finished difference Result 6683 states and 18179 transitions. [2021-07-13 18:17:37,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 18:17:37,096 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 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 52 [2021-07-13 18:17:37,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:37,129 INFO L225 Difference]: With dead ends: 6683 [2021-07-13 18:17:37,129 INFO L226 Difference]: Without dead ends: 6253 [2021-07-13 18:17:37,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 540.1ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 18:17:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2021-07-13 18:17:37,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 3417. [2021-07-13 18:17:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 2.768735362997658) internal successors, (9458), 3416 states have internal predecessors, (9458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 9458 transitions. [2021-07-13 18:17:37,213 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 9458 transitions. Word has length 52 [2021-07-13 18:17:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:37,213 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 9458 transitions. [2021-07-13 18:17:37,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 9458 transitions. [2021-07-13 18:17:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 18:17:37,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:37,218 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:37,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 18:17:37,439 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:37,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:37,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1798256098, now seen corresponding path program 8 times [2021-07-13 18:17:37,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:37,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140918564] [2021-07-13 18:17:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:37,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:37,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140918564] [2021-07-13 18:17:37,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140918564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:37,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545266951] [2021-07-13 18:17:37,531 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 [2021-07-13 18:17:37,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:17:37,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:37,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:17:37,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:37,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545266951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:37,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:37,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 18:17:37,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695118054] [2021-07-13 18:17:37,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:17:37,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:37,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:17:37,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:17:37,814 INFO L87 Difference]: Start difference. First operand 3417 states and 9458 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:38,060 INFO L93 Difference]: Finished difference Result 4904 states and 12966 transitions. [2021-07-13 18:17:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:17:38,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 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 57 [2021-07-13 18:17:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:38,068 INFO L225 Difference]: With dead ends: 4904 [2021-07-13 18:17:38,068 INFO L226 Difference]: Without dead ends: 4752 [2021-07-13 18:17:38,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:17:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4752 states. [2021-07-13 18:17:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4752 to 3417. [2021-07-13 18:17:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 2.768735362997658) internal successors, (9458), 3416 states have internal predecessors, (9458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 9458 transitions. [2021-07-13 18:17:38,131 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 9458 transitions. Word has length 57 [2021-07-13 18:17:38,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:38,132 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 9458 transitions. [2021-07-13 18:17:38,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:38,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 9458 transitions. [2021-07-13 18:17:38,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 18:17:38,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:38,138 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:38,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 18:17:38,353 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:38,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:38,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1035813408, now seen corresponding path program 9 times [2021-07-13 18:17:38,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:38,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025290309] [2021-07-13 18:17:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:38,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:38,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025290309] [2021-07-13 18:17:38,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025290309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:38,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271435684] [2021-07-13 18:17:38,481 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 [2021-07-13 18:17:38,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 18:17:38,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:38,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:17:38,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:39,217 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 998 DAG size of output: 1001 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown