/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 18:17:20,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 18:17:20,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 18:17:20,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-13 18:17:20,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-13 18:17:20,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-13 18:17:20,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-13 18:17:20,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-13 18:17:20,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-13 18:17:20,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-13 18:17:20,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-13 18:17:20,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-13 18:17:20,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 18:17:20,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 18:17:20,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 18:17:20,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 18:17:20,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 18:17:20,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 18:17:20,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 18:17:20,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 18:17:20,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 18:17:20,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 18:17:20,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 18:17:20,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 18:17:20,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 18:17:20,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 18:17:20,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 18:17:20,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 18:17:20,333 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 18:17:20,370 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 18:17:20,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 18:17:20,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 18:17:20,371 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 18:17:20,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 18:17:20,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 18:17:20,374 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 18:17:20,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 18:17:20,374 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 18:17:20,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 18:17:20,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 18:17:20,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 18:17:20,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 18:17:20,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 18:17:20,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 18:17:20,376 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 18:17:20,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 18:17:20,376 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 18:17:20,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 18:17:20,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 18:17:20,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 18:17:20,377 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 18:17:20,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 18:17:20,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 18:17:20,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 18:17:20,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 18:17:20,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 18:17:20,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 18:17:20,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 18:17:20,378 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 18:17:20,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 18:17:20,378 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 18:17:20,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 18:17:20,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 18:17:20,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 18:17:20,746 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-13 18:17:20,746 INFO L275 PluginConnector]: CDTParser initialized [2021-07-13 18:17:20,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2021-07-13 18:17:20,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17e400a4b/17d87c9acccf42cc82cc90cf41ee53cd/FLAGbb08ec3df [2021-07-13 18:17:21,319 INFO L306 CDTParser]: Found 1 translation units. [2021-07-13 18:17:21,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2021-07-13 18:17:21,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17e400a4b/17d87c9acccf42cc82cc90cf41ee53cd/FLAGbb08ec3df [2021-07-13 18:17:21,637 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17e400a4b/17d87c9acccf42cc82cc90cf41ee53cd [2021-07-13 18:17:21,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 18:17:21,641 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-13 18:17:21,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-13 18:17:21,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-13 18:17:21,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-13 18:17:21,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:17:21" (1/1) ... [2021-07-13 18:17:21,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f4dd0eb 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 18:17:21,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:17:21" (1/1) ... [2021-07-13 18:17:21,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-13 18:17:21,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-13 18:17:22,005 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-2.i[30922,30935] [2021-07-13 18:17:22,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:17:22,014 INFO L203 MainTranslator]: Completed pre-run [2021-07-13 18:17:22,070 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-2.i[30922,30935] [2021-07-13 18:17:22,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:17:22,114 INFO L208 MainTranslator]: Completed translation [2021-07-13 18:17:22,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:17:22 WrapperNode [2021-07-13 18:17:22,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-13 18:17:22,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 18:17:22,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 18:17:22,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 18:17:22,122 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 18:17:22,136 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 18:17:22,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 18:17:22,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 18:17:22,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 18:17:22,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 18:17:22,158 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 18:17:22,158 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 18:17:22,161 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 18:17:22,161 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 18:17:22,165 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 18:17:22,169 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 18:17:22,170 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 18:17:22,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 18:17:22,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 18:17:22,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 18:17:22,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 18:17:22,174 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 18:17:22,247 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-13 18:17:22,248 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-13 18:17:22,248 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-13 18:17:22,249 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-13 18:17:22,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-13 18:17:22,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-07-13 18:17:22,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-13 18:17:22,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-13 18:17:22,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-13 18:17:22,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-07-13 18:17:22,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 18:17:22,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 18:17:22,253 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 18:17:22,614 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 18:17:22,614 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-13 18:17:22,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:17:22 BoogieIcfgContainer [2021-07-13 18:17:22,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 18:17:22,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 18:17:22,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 18:17:22,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 18:17:22,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:17:21" (1/3) ... [2021-07-13 18:17:22,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5275cb2d 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 18:17:22,621 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 18:17:22,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5275cb2d 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 18:17:22,621 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 18:17:22,623 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2021-07-13 18:17:22,628 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 18:17:22,628 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 18:17:22,628 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 18:17:22,629 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 18:17:22,652 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,653 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,653 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,653 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,653 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,653 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,655 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,655 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,655 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,655 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,655 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,655 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,656 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,656 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,656 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,656 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,658 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,658 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,658 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,658 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,658 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,658 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,658 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,660 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,660 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,660 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,660 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,660 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,660 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,661 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,661 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,661 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,661 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,661 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,661 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,661 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,662 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,662 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,662 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,663 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,664 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,664 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,664 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,664 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,664 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,669 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,669 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,670 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,670 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,670 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,670 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:17:22,672 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-13 18:17:22,691 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 18:17:22,707 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:17:22,707 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:17:22,707 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:17:22,707 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:17:22,708 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:17:22,708 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:17:22,708 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:17:22,708 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 18:17:22,719 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-07-13 18:17:22,777 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 18:17:22,781 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 18:17:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 18:17:22,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:22,795 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 18:17:22,795 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:22,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-07-13 18:17:22,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:22,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984634553] [2021-07-13 18:17:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:23,206 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 18:17:23,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:23,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984634553] [2021-07-13 18:17:23,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984634553] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:17:23,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:17:23,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 18:17:23,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71908328] [2021-07-13 18:17:23,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 18:17:23,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:23,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 18:17:23,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:17:23,237 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 18:17:23,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:23,464 INFO L93 Difference]: Finished difference Result 1756 states and 4724 transitions. [2021-07-13 18:17:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 18:17:23,481 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 18:17:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:23,522 INFO L225 Difference]: With dead ends: 1756 [2021-07-13 18:17:23,522 INFO L226 Difference]: Without dead ends: 1425 [2021-07-13 18:17:23,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:17:23,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-07-13 18:17:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-07-13 18:17:23,647 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 18:17:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-07-13 18:17:23,663 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-07-13 18:17:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:23,663 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-07-13 18:17:23,664 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 18:17:23,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-07-13 18:17:23,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 18:17:23,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:23,674 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 18:17:23,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 18:17:23,674 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:23,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:23,679 INFO L82 PathProgramCache]: Analyzing trace with hash 352608555, now seen corresponding path program 1 times [2021-07-13 18:17:23,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:23,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266332686] [2021-07-13 18:17:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:23,908 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 18:17:23,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:23,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266332686] [2021-07-13 18:17:23,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266332686] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:17:23,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:17:23,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 18:17:23,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114833201] [2021-07-13 18:17:23,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 18:17:23,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:23,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 18:17:23,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:17:23,911 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 18:17:24,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:24,042 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-07-13 18:17:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 18:17:24,043 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 18:17:24,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:24,053 INFO L225 Difference]: With dead ends: 2025 [2021-07-13 18:17:24,054 INFO L226 Difference]: Without dead ends: 1758 [2021-07-13 18:17:24,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 18:17:24,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-07-13 18:17:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-07-13 18:17:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.7328605200945626) internal successors, (3468), 1269 states have internal predecessors, (3468), 0 states have call successors, (0), 0 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 18:17:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-07-13 18:17:24,104 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-07-13 18:17:24,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:24,104 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-07-13 18:17:24,105 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 18:17:24,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-07-13 18:17:24,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 18:17:24,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:24,108 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 18:17:24,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 18:17:24,109 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:24,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:24,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-07-13 18:17:24,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:24,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443069289] [2021-07-13 18:17:24,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:24,185 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 18:17:24,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:24,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443069289] [2021-07-13 18:17:24,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443069289] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:17:24,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:17:24,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 18:17:24,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013212483] [2021-07-13 18:17:24,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 18:17:24,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:24,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 18:17:24,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:17:24,188 INFO L87 Difference]: Start difference. First operand 1270 states and 3468 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 18:17:24,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:24,277 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-07-13 18:17:24,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 18:17:24,278 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 18:17:24,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:24,288 INFO L225 Difference]: With dead ends: 2062 [2021-07-13 18:17:24,289 INFO L226 Difference]: Without dead ends: 1758 [2021-07-13 18:17:24,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 18:17:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-07-13 18:17:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-07-13 18:17:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.683381088825215) internal successors, (3746), 1396 states have internal predecessors, (3746), 0 states have call successors, (0), 0 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 18:17:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-07-13 18:17:24,338 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-07-13 18:17:24,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:24,339 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-07-13 18:17:24,339 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 18:17:24,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-07-13 18:17:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 18:17:24,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:24,343 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 18:17:24,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 18:17:24,344 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:24,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-07-13 18:17:24,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:24,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550904484] [2021-07-13 18:17:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:24,471 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 18:17:24,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:24,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550904484] [2021-07-13 18:17:24,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550904484] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:17:24,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:17:24,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 18:17:24,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679351423] [2021-07-13 18:17:24,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 18:17:24,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:24,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 18:17:24,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:17:24,480 INFO L87 Difference]: Start difference. First operand 1397 states and 3746 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 18:17:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:24,612 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-07-13 18:17:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 18:17:24,614 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 18:17:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:24,632 INFO L225 Difference]: With dead ends: 2318 [2021-07-13 18:17:24,632 INFO L226 Difference]: Without dead ends: 1987 [2021-07-13 18:17:24,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 18:17:24,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-07-13 18:17:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-07-13 18:17:24,683 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 18:17:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-07-13 18:17:24,691 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-07-13 18:17:24,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:24,693 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-07-13 18:17:24,694 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 18:17:24,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-07-13 18:17:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 18:17:24,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:24,697 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] [2021-07-13 18:17:24,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 18:17:24,697 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:24,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:24,698 INFO L82 PathProgramCache]: Analyzing trace with hash 476803984, now seen corresponding path program 1 times [2021-07-13 18:17:24,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:24,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368602098] [2021-07-13 18:17:24,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:24,846 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 18:17:24,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:24,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368602098] [2021-07-13 18:17:24,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368602098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:24,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071529411] [2021-07-13 18:17:24,847 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 18:17:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:24,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 18:17:24,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:25,273 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 18:17:25,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071529411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:25,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:25,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 18:17:25,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101687697] [2021-07-13 18:17:25,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:17:25,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:25,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:17:25,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:17:25,276 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:25,498 INFO L93 Difference]: Finished difference Result 2931 states and 7780 transitions. [2021-07-13 18:17:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 18:17:25,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 18:17:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:25,513 INFO L225 Difference]: With dead ends: 2931 [2021-07-13 18:17:25,513 INFO L226 Difference]: Without dead ends: 2549 [2021-07-13 18:17:25,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:17:25,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-07-13 18:17:25,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1814. [2021-07-13 18:17:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 2.724765581908439) internal successors, (4940), 1813 states have internal predecessors, (4940), 0 states have call successors, (0), 0 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 18:17:25,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 4940 transitions. [2021-07-13 18:17:25,609 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 4940 transitions. Word has length 42 [2021-07-13 18:17:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:25,609 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 4940 transitions. [2021-07-13 18:17:25,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:25,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 4940 transitions. [2021-07-13 18:17:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 18:17:25,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:25,613 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 18:17:25,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:25,829 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash -504897849, now seen corresponding path program 1 times [2021-07-13 18:17:25,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:25,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571982142] [2021-07-13 18:17:25,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:25,921 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 18:17:25,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:25,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571982142] [2021-07-13 18:17:25,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571982142] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:17:25,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:17:25,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 18:17:25,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332447005] [2021-07-13 18:17:25,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 18:17:25,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:25,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 18:17:25,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 18:17:25,924 INFO L87 Difference]: Start difference. First operand 1814 states and 4940 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 18:17:26,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:26,012 INFO L93 Difference]: Finished difference Result 2566 states and 6814 transitions. [2021-07-13 18:17:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 18:17:26,013 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 18:17:26,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:26,026 INFO L225 Difference]: With dead ends: 2566 [2021-07-13 18:17:26,026 INFO L226 Difference]: Without dead ends: 2414 [2021-07-13 18:17:26,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 18:17:26,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-07-13 18:17:26,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1902. [2021-07-13 18:17:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.7064702788006314) internal successors, (5145), 1901 states have internal predecessors, (5145), 0 states have call successors, (0), 0 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 18:17:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5145 transitions. [2021-07-13 18:17:26,089 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5145 transitions. Word has length 42 [2021-07-13 18:17:26,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:26,090 INFO L482 AbstractCegarLoop]: Abstraction has 1902 states and 5145 transitions. [2021-07-13 18:17:26,090 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 18:17:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5145 transitions. [2021-07-13 18:17:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 18:17:26,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:26,093 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 18:17:26,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 18:17:26,094 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:26,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:26,094 INFO L82 PathProgramCache]: Analyzing trace with hash -704490053, now seen corresponding path program 2 times [2021-07-13 18:17:26,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:26,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688314189] [2021-07-13 18:17:26,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:26,203 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 18:17:26,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:26,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688314189] [2021-07-13 18:17:26,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688314189] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:17:26,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:17:26,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 18:17:26,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966173774] [2021-07-13 18:17:26,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 18:17:26,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:26,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 18:17:26,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 18:17:26,205 INFO L87 Difference]: Start difference. First operand 1902 states and 5145 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 18:17:26,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:26,352 INFO L93 Difference]: Finished difference Result 2949 states and 7860 transitions. [2021-07-13 18:17:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 18:17:26,353 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 18:17:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:26,366 INFO L225 Difference]: With dead ends: 2949 [2021-07-13 18:17:26,367 INFO L226 Difference]: Without dead ends: 2682 [2021-07-13 18:17:26,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:17:26,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-07-13 18:17:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1884. [2021-07-13 18:17:26,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 2.729155602761551) internal successors, (5139), 1883 states have internal predecessors, (5139), 0 states have call successors, (0), 0 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 L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 5139 transitions. [2021-07-13 18:17:26,430 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 5139 transitions. Word has length 42 [2021-07-13 18:17:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:26,430 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 5139 transitions. [2021-07-13 18:17:26,430 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 18:17:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 5139 transitions. [2021-07-13 18:17:26,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 18:17:26,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:26,434 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] [2021-07-13 18:17:26,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 18:17:26,434 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:26,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:26,435 INFO L82 PathProgramCache]: Analyzing trace with hash -109178658, now seen corresponding path program 1 times [2021-07-13 18:17:26,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:26,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764899880] [2021-07-13 18:17:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:26,554 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 18:17:26,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:26,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764899880] [2021-07-13 18:17:26,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764899880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:26,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713580898] [2021-07-13 18:17:26,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:26,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 18:17:26,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:26,770 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 18:17:26,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713580898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:26,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:26,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 18:17:26,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356243602] [2021-07-13 18:17:26,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:17:26,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:26,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:17:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:17:26,772 INFO L87 Difference]: Start difference. First operand 1884 states and 5139 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:26,924 INFO L93 Difference]: Finished difference Result 3126 states and 8198 transitions. [2021-07-13 18:17:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 18:17:26,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 18:17:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:26,954 INFO L225 Difference]: With dead ends: 3126 [2021-07-13 18:17:26,954 INFO L226 Difference]: Without dead ends: 2646 [2021-07-13 18:17:26,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:17:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-07-13 18:17:27,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2032. [2021-07-13 18:17:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 2.6853766617429837) internal successors, (5454), 2031 states have internal predecessors, (5454), 0 states have call successors, (0), 0 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 18:17:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 5454 transitions. [2021-07-13 18:17:27,022 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 5454 transitions. Word has length 42 [2021-07-13 18:17:27,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:27,024 INFO L482 AbstractCegarLoop]: Abstraction has 2032 states and 5454 transitions. [2021-07-13 18:17:27,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:27,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 5454 transitions. [2021-07-13 18:17:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 18:17:27,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:27,027 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] [2021-07-13 18:17:27,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:27,249 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:27,250 INFO L82 PathProgramCache]: Analyzing trace with hash 239343274, now seen corresponding path program 2 times [2021-07-13 18:17:27,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:27,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502031565] [2021-07-13 18:17:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:27,321 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 18:17:27,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:27,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502031565] [2021-07-13 18:17:27,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502031565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:27,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313303605] [2021-07-13 18:17:27,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:27,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:17:27,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:27,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 18:17:27,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:27,576 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 18:17:27,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313303605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:27,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:27,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 18:17:27,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420584201] [2021-07-13 18:17:27,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:17:27,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:27,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:17:27,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:17:27,578 INFO L87 Difference]: Start difference. First operand 2032 states and 5454 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:27,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:27,744 INFO L93 Difference]: Finished difference Result 3246 states and 8438 transitions. [2021-07-13 18:17:27,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 18:17:27,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 18:17:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:27,753 INFO L225 Difference]: With dead ends: 3246 [2021-07-13 18:17:27,754 INFO L226 Difference]: Without dead ends: 2766 [2021-07-13 18:17:27,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:17:27,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-07-13 18:17:27,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2089. [2021-07-13 18:17:27,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 2.692528735632184) internal successors, (5622), 2088 states have internal predecessors, (5622), 0 states have call successors, (0), 0 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 18:17:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 5622 transitions. [2021-07-13 18:17:27,820 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 5622 transitions. Word has length 42 [2021-07-13 18:17:27,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:27,820 INFO L482 AbstractCegarLoop]: Abstraction has 2089 states and 5622 transitions. [2021-07-13 18:17:27,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:27,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 5622 transitions. [2021-07-13 18:17:27,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 18:17:27,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:27,824 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] [2021-07-13 18:17:28,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 18:17:28,049 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:28,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1660775728, now seen corresponding path program 3 times [2021-07-13 18:17:28,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:28,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445600210] [2021-07-13 18:17:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:28,122 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 18:17:28,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:28,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445600210] [2021-07-13 18:17:28,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445600210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:28,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071647351] [2021-07-13 18:17:28,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:28,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 18:17:28,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:28,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 18:17:28,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:28,381 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 18:17:28,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071647351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:28,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:28,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 18:17:28,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824667043] [2021-07-13 18:17:28,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:17:28,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:28,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:17:28,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:17:28,383 INFO L87 Difference]: Start difference. First operand 2089 states and 5622 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:28,643 INFO L93 Difference]: Finished difference Result 3590 states and 9510 transitions. [2021-07-13 18:17:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 18:17:28,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 18:17:28,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:28,653 INFO L225 Difference]: With dead ends: 3590 [2021-07-13 18:17:28,653 INFO L226 Difference]: Without dead ends: 3056 [2021-07-13 18:17:28,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:17:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-07-13 18:17:28,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2263. [2021-07-13 18:17:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.7214854111405837) internal successors, (6156), 2262 states have internal predecessors, (6156), 0 states have call successors, (0), 0 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 18:17:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6156 transitions. [2021-07-13 18:17:28,726 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6156 transitions. Word has length 42 [2021-07-13 18:17:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:28,727 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6156 transitions. [2021-07-13 18:17:28,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6156 transitions. [2021-07-13 18:17:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 18:17:28,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:28,732 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 18:17:28,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:28,953 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:28,954 INFO L82 PathProgramCache]: Analyzing trace with hash -965377150, now seen corresponding path program 1 times [2021-07-13 18:17:28,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:28,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543292943] [2021-07-13 18:17:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:29,068 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 18:17:29,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:29,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543292943] [2021-07-13 18:17:29,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543292943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:29,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107301623] [2021-07-13 18:17:29,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:29,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:17:29,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:29,314 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 18:17:29,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107301623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:29,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:29,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 18:17:29,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900394614] [2021-07-13 18:17:29,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:17:29,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:29,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:17:29,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:17:29,316 INFO L87 Difference]: Start difference. First operand 2263 states and 6156 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 18:17:29,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:29,467 INFO L93 Difference]: Finished difference Result 3186 states and 8435 transitions. [2021-07-13 18:17:29,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 18:17:29,468 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 18:17:29,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:29,476 INFO L225 Difference]: With dead ends: 3186 [2021-07-13 18:17:29,476 INFO L226 Difference]: Without dead ends: 3034 [2021-07-13 18:17:29,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:17:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-07-13 18:17:29,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 2351. [2021-07-13 18:17:29,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 2.706808510638298) internal successors, (6361), 2350 states have internal predecessors, (6361), 0 states have call successors, (0), 0 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 18:17:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 6361 transitions. [2021-07-13 18:17:29,567 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 6361 transitions. Word has length 47 [2021-07-13 18:17:29,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:29,567 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 6361 transitions. [2021-07-13 18:17:29,568 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 18:17:29,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 6361 transitions. [2021-07-13 18:17:29,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 18:17:29,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:29,572 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 18:17:29,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 18:17:29,789 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:29,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:29,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1164969354, now seen corresponding path program 2 times [2021-07-13 18:17:29,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:29,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282447896] [2021-07-13 18:17:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:29,874 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 18:17:29,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:29,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282447896] [2021-07-13 18:17:29,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282447896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:29,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684361242] [2021-07-13 18:17:29,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:29,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:17:29,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:29,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:17:29,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:30,094 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 18:17:30,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684361242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:30,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:30,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 18:17:30,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987481090] [2021-07-13 18:17:30,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:17:30,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:30,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:17:30,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:17:30,097 INFO L87 Difference]: Start difference. First operand 2351 states and 6361 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:30,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:30,471 INFO L93 Difference]: Finished difference Result 4460 states and 11788 transitions. [2021-07-13 18:17:30,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:17:30,471 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 18:17:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:30,482 INFO L225 Difference]: With dead ends: 4460 [2021-07-13 18:17:30,483 INFO L226 Difference]: Without dead ends: 3902 [2021-07-13 18:17:30,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 294.4ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:17:30,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2021-07-13 18:17:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 2378. [2021-07-13 18:17:30,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7328565418594866) internal successors, (6496), 2377 states have internal predecessors, (6496), 0 states have call successors, (0), 0 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 18:17:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6496 transitions. [2021-07-13 18:17:30,549 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6496 transitions. Word has length 47 [2021-07-13 18:17:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:30,549 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6496 transitions. [2021-07-13 18:17:30,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6496 transitions. [2021-07-13 18:17:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 18:17:30,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:30,554 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 18:17:30,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:30,765 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:30,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:30,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1283832340, now seen corresponding path program 1 times [2021-07-13 18:17:30,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:30,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90221727] [2021-07-13 18:17:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:30,860 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 18:17:30,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:30,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90221727] [2021-07-13 18:17:30,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90221727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:30,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234228698] [2021-07-13 18:17:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:30,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:17:30,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:31,093 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 18:17:31,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234228698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:31,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:31,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 18:17:31,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857045326] [2021-07-13 18:17:31,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:17:31,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:31,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:17:31,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:17:31,096 INFO L87 Difference]: Start difference. First operand 2378 states and 6496 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 18:17:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:31,291 INFO L93 Difference]: Finished difference Result 3748 states and 9803 transitions. [2021-07-13 18:17:31,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 18:17:31,291 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 18:17:31,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:31,300 INFO L225 Difference]: With dead ends: 3748 [2021-07-13 18:17:31,300 INFO L226 Difference]: Without dead ends: 3356 [2021-07-13 18:17:31,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:17:31,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-07-13 18:17:31,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2418. [2021-07-13 18:17:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.7207281754240795) internal successors, (6576), 2417 states have internal predecessors, (6576), 0 states have call successors, (0), 0 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 18:17:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 6576 transitions. [2021-07-13 18:17:31,359 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 6576 transitions. Word has length 47 [2021-07-13 18:17:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:31,359 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 6576 transitions. [2021-07-13 18:17:31,359 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 18:17:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 6576 transitions. [2021-07-13 18:17:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 18:17:31,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:31,363 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 18:17:31,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:31,577 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash -796889656, now seen corresponding path program 2 times [2021-07-13 18:17:31,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:31,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092477629] [2021-07-13 18:17:31,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:31,648 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 18:17:31,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:31,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092477629] [2021-07-13 18:17:31,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092477629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:31,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925238895] [2021-07-13 18:17:31,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:31,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:17:31,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:31,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:17:31,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:31,863 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 18:17:31,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925238895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:31,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:31,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 18:17:31,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582241907] [2021-07-13 18:17:31,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:17:31,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:31,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:17:31,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:17:31,865 INFO L87 Difference]: Start difference. First operand 2418 states and 6576 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 18:17:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:32,090 INFO L93 Difference]: Finished difference Result 3948 states and 10203 transitions. [2021-07-13 18:17:32,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 18:17:32,091 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 18:17:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:32,100 INFO L225 Difference]: With dead ends: 3948 [2021-07-13 18:17:32,100 INFO L226 Difference]: Without dead ends: 3556 [2021-07-13 18:17:32,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:17:32,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2021-07-13 18:17:32,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 2436. [2021-07-13 18:17:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 2.720328542094456) internal successors, (6624), 2435 states have internal predecessors, (6624), 0 states have call successors, (0), 0 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 18:17:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 6624 transitions. [2021-07-13 18:17:32,161 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 6624 transitions. Word has length 47 [2021-07-13 18:17:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:32,161 INFO L482 AbstractCegarLoop]: Abstraction has 2436 states and 6624 transitions. [2021-07-13 18:17:32,161 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 18:17:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 6624 transitions. [2021-07-13 18:17:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 18:17:32,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:32,166 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 18:17:32,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 18:17:32,391 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:32,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:32,391 INFO L82 PathProgramCache]: Analyzing trace with hash 519106886, now seen corresponding path program 3 times [2021-07-13 18:17:32,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:32,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131021485] [2021-07-13 18:17:32,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:32,471 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 18:17:32,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:32,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131021485] [2021-07-13 18:17:32,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131021485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:32,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790605425] [2021-07-13 18:17:32,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:32,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 18:17:32,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:32,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:17:32,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:32,731 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 18:17:32,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790605425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:32,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:32,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 18:17:32,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374420259] [2021-07-13 18:17:32,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:17:32,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:32,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:17:32,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:17:32,733 INFO L87 Difference]: Start difference. First operand 2436 states and 6624 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 18:17:32,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:32,985 INFO L93 Difference]: Finished difference Result 4116 states and 10723 transitions. [2021-07-13 18:17:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 18:17:32,985 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 18:17:32,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:32,994 INFO L225 Difference]: With dead ends: 4116 [2021-07-13 18:17:32,994 INFO L226 Difference]: Without dead ends: 3724 [2021-07-13 18:17:32,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-07-13 18:17:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3724 states. [2021-07-13 18:17:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3724 to 2601. [2021-07-13 18:17:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2601 states, 2600 states have (on average 2.7380769230769233) internal successors, (7119), 2600 states have internal predecessors, (7119), 0 states have call successors, (0), 0 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 18:17:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 7119 transitions. [2021-07-13 18:17:33,050 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 7119 transitions. Word has length 47 [2021-07-13 18:17:33,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:33,050 INFO L482 AbstractCegarLoop]: Abstraction has 2601 states and 7119 transitions. [2021-07-13 18:17:33,050 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 18:17:33,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 7119 transitions. [2021-07-13 18:17:33,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 18:17:33,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:33,054 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 18:17:33,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:33,269 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:33,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:33,269 INFO L82 PathProgramCache]: Analyzing trace with hash 458639374, now seen corresponding path program 4 times [2021-07-13 18:17:33,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:33,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986946701] [2021-07-13 18:17:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:33,348 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 18:17:33,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:33,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986946701] [2021-07-13 18:17:33,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986946701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:33,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80320331] [2021-07-13 18:17:33,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:33,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:17:33,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:33,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:17:33,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:33,568 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 18:17:33,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80320331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:33,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:33,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 18:17:33,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518503069] [2021-07-13 18:17:33,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:17:33,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:33,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:17:33,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:17:33,570 INFO L87 Difference]: Start difference. First operand 2601 states and 7119 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 18:17:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:34,109 INFO L93 Difference]: Finished difference Result 5603 states and 14844 transitions. [2021-07-13 18:17:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:17:34,109 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 18:17:34,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:34,120 INFO L225 Difference]: With dead ends: 5603 [2021-07-13 18:17:34,120 INFO L226 Difference]: Without dead ends: 4778 [2021-07-13 18:17:34,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 447.5ms TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:17:34,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4778 states. [2021-07-13 18:17:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4778 to 2749. [2021-07-13 18:17:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2748 states have (on average 2.727802037845706) internal successors, (7496), 2748 states have internal predecessors, (7496), 0 states have call successors, (0), 0 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 18:17:34,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 7496 transitions. [2021-07-13 18:17:34,198 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 7496 transitions. Word has length 47 [2021-07-13 18:17:34,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:34,199 INFO L482 AbstractCegarLoop]: Abstraction has 2749 states and 7496 transitions. [2021-07-13 18:17:34,199 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 18:17:34,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 7496 transitions. [2021-07-13 18:17:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 18:17:34,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:34,205 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] [2021-07-13 18:17:34,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:34,430 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash 107753584, now seen corresponding path program 2 times [2021-07-13 18:17:34,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:34,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466927771] [2021-07-13 18:17:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:34,524 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 18:17:34,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:34,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466927771] [2021-07-13 18:17:34,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466927771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:34,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356076206] [2021-07-13 18:17:34,525 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 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 18:17:34,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:17:34,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:34,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:17:34,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:34,783 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 18:17:34,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356076206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:34,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:34,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 18:17:34,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840617022] [2021-07-13 18:17:34,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:17:34,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:34,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:17:34,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:17:34,785 INFO L87 Difference]: Start difference. First operand 2749 states and 7496 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 18:17:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:35,024 INFO L93 Difference]: Finished difference Result 4577 states and 12242 transitions. [2021-07-13 18:17:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 18:17:35,025 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 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 18:17:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:35,034 INFO L225 Difference]: With dead ends: 4577 [2021-07-13 18:17:35,034 INFO L226 Difference]: Without dead ends: 4195 [2021-07-13 18:17:35,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-07-13 18:17:35,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-07-13 18:17:35,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 3079. [2021-07-13 18:17:35,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.748213125406108) internal successors, (8459), 3078 states have internal predecessors, (8459), 0 states have call successors, (0), 0 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 18:17:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8459 transitions. [2021-07-13 18:17:35,136 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8459 transitions. Word has length 52 [2021-07-13 18:17:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:35,136 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8459 transitions. [2021-07-13 18:17:35,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 18:17:35,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8459 transitions. [2021-07-13 18:17:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 18:17:35,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:35,148 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 18:17:35,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 18:17:35,365 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:35,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:35,365 INFO L82 PathProgramCache]: Analyzing trace with hash -873948249, now seen corresponding path program 3 times [2021-07-13 18:17:35,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:35,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067873257] [2021-07-13 18:17:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:35,453 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 18:17:35,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:35,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067873257] [2021-07-13 18:17:35,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067873257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:35,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170803863] [2021-07-13 18:17:35,454 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 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 18:17:35,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 18:17:35,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:35,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 18:17:35,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:35,634 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 18:17:35,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170803863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:35,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:35,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 18:17:35,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996903023] [2021-07-13 18:17:35,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 18:17:35,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:35,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 18:17:35,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 18:17:35,636 INFO L87 Difference]: Start difference. First operand 3079 states and 8459 transitions. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:35,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:35,775 INFO L93 Difference]: Finished difference Result 4154 states and 11067 transitions. [2021-07-13 18:17:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 18:17:35,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-07-13 18:17:35,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:35,782 INFO L225 Difference]: With dead ends: 4154 [2021-07-13 18:17:35,782 INFO L226 Difference]: Without dead ends: 4002 [2021-07-13 18:17:35,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:17:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2021-07-13 18:17:35,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 3176. [2021-07-13 18:17:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3176 states, 3175 states have (on average 2.733543307086614) internal successors, (8679), 3175 states have internal predecessors, (8679), 0 states have call successors, (0), 0 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 18:17:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3176 states to 3176 states and 8679 transitions. [2021-07-13 18:17:35,840 INFO L78 Accepts]: Start accepts. Automaton has 3176 states and 8679 transitions. Word has length 52 [2021-07-13 18:17:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:35,840 INFO L482 AbstractCegarLoop]: Abstraction has 3176 states and 8679 transitions. [2021-07-13 18:17:35,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:17:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3176 states and 8679 transitions. [2021-07-13 18:17:35,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 18:17:35,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:35,847 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 18:17:36,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 18:17:36,068 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:36,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:36,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1073540453, now seen corresponding path program 4 times [2021-07-13 18:17:36,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:36,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534151649] [2021-07-13 18:17:36,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:36,167 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 18:17:36,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:36,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534151649] [2021-07-13 18:17:36,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534151649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:36,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994575672] [2021-07-13 18:17:36,168 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 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 18:17:36,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:17:36,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:36,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:17:36,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:36,488 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 18:17:36,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994575672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:36,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:36,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 18:17:36,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400399907] [2021-07-13 18:17:36,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:17:36,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:36,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:17:36,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:17:36,490 INFO L87 Difference]: Start difference. First operand 3176 states and 8679 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 18:17:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:36,900 INFO L93 Difference]: Finished difference Result 5283 states and 14179 transitions. [2021-07-13 18:17:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:17:36,900 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 18:17:36,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:36,908 INFO L225 Difference]: With dead ends: 5283 [2021-07-13 18:17:36,909 INFO L226 Difference]: Without dead ends: 4901 [2021-07-13 18:17:36,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 419.7ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:17:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-07-13 18:17:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 3203. [2021-07-13 18:17:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.740474703310431) internal successors, (8775), 3202 states have internal predecessors, (8775), 0 states have call successors, (0), 0 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 18:17:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8775 transitions. [2021-07-13 18:17:36,984 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8775 transitions. Word has length 52 [2021-07-13 18:17:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:36,984 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8775 transitions. [2021-07-13 18:17:36,985 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 18:17:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8775 transitions. [2021-07-13 18:17:36,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 18:17:36,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:36,990 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 18:17:37,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 18:17:37,213 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:37,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:37,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1375261241, now seen corresponding path program 1 times [2021-07-13 18:17:37,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:37,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064172561] [2021-07-13 18:17:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:37,302 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 18:17:37,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:37,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064172561] [2021-07-13 18:17:37,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064172561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:37,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500450899] [2021-07-13 18:17:37,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:37,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:17:37,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:37,542 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 18:17:37,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500450899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:37,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:37,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 18:17:37,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795035252] [2021-07-13 18:17:37,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:17:37,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:37,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:17:37,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:17:37,544 INFO L87 Difference]: Start difference. First operand 3203 states and 8775 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 18:17:37,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:37,835 INFO L93 Difference]: Finished difference Result 4495 states and 11783 transitions. [2021-07-13 18:17:37,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 18:17:37,836 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 18:17:37,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:37,844 INFO L225 Difference]: With dead ends: 4495 [2021-07-13 18:17:37,844 INFO L226 Difference]: Without dead ends: 4343 [2021-07-13 18:17:37,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 307.4ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-07-13 18:17:37,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4343 states. [2021-07-13 18:17:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4343 to 3340. [2021-07-13 18:17:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 2.720275531596286) internal successors, (9083), 3339 states have internal predecessors, (9083), 0 states have call successors, (0), 0 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 18:17:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 9083 transitions. [2021-07-13 18:17:37,919 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 9083 transitions. Word has length 52 [2021-07-13 18:17:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:37,919 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 9083 transitions. [2021-07-13 18:17:37,919 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 18:17:37,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 9083 transitions. [2021-07-13 18:17:37,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 18:17:37,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:37,925 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 18:17:38,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:38,149 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:38,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:38,149 INFO L82 PathProgramCache]: Analyzing trace with hash -705460755, now seen corresponding path program 2 times [2021-07-13 18:17:38,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:38,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168252714] [2021-07-13 18:17:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:38,248 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 18:17:38,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:38,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168252714] [2021-07-13 18:17:38,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168252714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:38,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971420027] [2021-07-13 18:17:38,249 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:38,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:17:38,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:38,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:17:38,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:38,484 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 18:17:38,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971420027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:38,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:38,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 18:17:38,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318510814] [2021-07-13 18:17:38,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:17:38,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:38,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:17:38,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:17:38,485 INFO L87 Difference]: Start difference. First operand 3340 states and 9083 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 18:17:38,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:38,878 INFO L93 Difference]: Finished difference Result 4909 states and 12794 transitions. [2021-07-13 18:17:38,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:17:38,879 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 18:17:38,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:38,887 INFO L225 Difference]: With dead ends: 4909 [2021-07-13 18:17:38,888 INFO L226 Difference]: Without dead ends: 4757 [2021-07-13 18:17:38,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-07-13 18:17:38,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4757 states. [2021-07-13 18:17:38,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4757 to 3332. [2021-07-13 18:17:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 2.7469228459921946) internal successors, (9150), 3331 states have internal predecessors, (9150), 0 states have call successors, (0), 0 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 18:17:38,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 9150 transitions. [2021-07-13 18:17:38,960 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 9150 transitions. Word has length 52 [2021-07-13 18:17:38,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:38,960 INFO L482 AbstractCegarLoop]: Abstraction has 3332 states and 9150 transitions. [2021-07-13 18:17:38,960 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 18:17:38,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 9150 transitions. [2021-07-13 18:17:38,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 18:17:38,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:38,966 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 18:17:39,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 18:17:39,190 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:39,191 INFO L82 PathProgramCache]: Analyzing trace with hash 610535787, now seen corresponding path program 3 times [2021-07-13 18:17:39,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:39,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398502189] [2021-07-13 18:17:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:39,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:39,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398502189] [2021-07-13 18:17:39,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398502189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:39,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689603198] [2021-07-13 18:17:39,279 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:39,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 18:17:39,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:39,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:17:39,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:39,534 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 18:17:39,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689603198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:39,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:39,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 18:17:39,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636070693] [2021-07-13 18:17:39,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:17:39,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:39,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:17:39,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:17:39,536 INFO L87 Difference]: Start difference. First operand 3332 states and 9150 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 18:17:39,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:39,887 INFO L93 Difference]: Finished difference Result 4865 states and 13014 transitions. [2021-07-13 18:17:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:17:39,888 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 18:17:39,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:39,895 INFO L225 Difference]: With dead ends: 4865 [2021-07-13 18:17:39,896 INFO L226 Difference]: Without dead ends: 4713 [2021-07-13 18:17:39,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:17:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-07-13 18:17:39,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 3515. [2021-07-13 18:17:39,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3515 states, 3514 states have (on average 2.7583949914627204) internal successors, (9693), 3514 states have internal predecessors, (9693), 0 states have call successors, (0), 0 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 18:17:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3515 states to 3515 states and 9693 transitions. [2021-07-13 18:17:39,957 INFO L78 Accepts]: Start accepts. Automaton has 3515 states and 9693 transitions. Word has length 52 [2021-07-13 18:17:39,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:39,957 INFO L482 AbstractCegarLoop]: Abstraction has 3515 states and 9693 transitions. [2021-07-13 18:17:39,957 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 18:17:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3515 states and 9693 transitions. [2021-07-13 18:17:39,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 18:17:39,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:39,961 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 18:17:40,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:40,167 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:40,167 INFO L82 PathProgramCache]: Analyzing trace with hash 550068275, now seen corresponding path program 4 times [2021-07-13 18:17:40,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:40,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413146214] [2021-07-13 18:17:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:40,312 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 18:17:40,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:40,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413146214] [2021-07-13 18:17:40,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413146214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:40,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741087985] [2021-07-13 18:17:40,313 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:40,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:17:40,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:40,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:17:40,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:40,543 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 18:17:40,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741087985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:40,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:40,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 18:17:40,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84582328] [2021-07-13 18:17:40,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:17:40,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:40,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:17:40,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:17:40,544 INFO L87 Difference]: Start difference. First operand 3515 states and 9693 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 18:17:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:41,176 INFO L93 Difference]: Finished difference Result 6692 states and 18060 transitions. [2021-07-13 18:17:41,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 18:17:41,177 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 18:17:41,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:41,186 INFO L225 Difference]: With dead ends: 6692 [2021-07-13 18:17:41,186 INFO L226 Difference]: Without dead ends: 6131 [2021-07-13 18:17:41,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 604.0ms TimeCoverageRelationStatistics Valid=488, Invalid=1674, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 18:17:41,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6131 states. [2021-07-13 18:17:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6131 to 3407. [2021-07-13 18:17:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 3406 states have (on average 2.768349970640047) internal successors, (9429), 3406 states have internal predecessors, (9429), 0 states have call successors, (0), 0 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 18:17:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 9429 transitions. [2021-07-13 18:17:41,243 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 9429 transitions. Word has length 52 [2021-07-13 18:17:41,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:41,243 INFO L482 AbstractCegarLoop]: Abstraction has 3407 states and 9429 transitions. [2021-07-13 18:17:41,243 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 18:17:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 9429 transitions. [2021-07-13 18:17:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 18:17:41,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:41,247 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 18:17:41,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 18:17:41,449 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:41,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:41,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1774703266, now seen corresponding path program 5 times [2021-07-13 18:17:41,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:41,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660123796] [2021-07-13 18:17:41,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:41,572 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 18:17:41,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:41,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660123796] [2021-07-13 18:17:41,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660123796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:41,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385455297] [2021-07-13 18:17:41,572 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:41,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 18:17:41,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:41,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:17:41,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:41,849 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 18:17:41,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385455297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:41,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:41,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 18:17:41,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301375293] [2021-07-13 18:17:41,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:17:41,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:41,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:17:41,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:17:41,850 INFO L87 Difference]: Start difference. First operand 3407 states and 9429 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 18:17:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:42,027 INFO L93 Difference]: Finished difference Result 4692 states and 12647 transitions. [2021-07-13 18:17:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 18:17:42,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 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 18:17:42,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:42,037 INFO L225 Difference]: With dead ends: 4692 [2021-07-13 18:17:42,037 INFO L226 Difference]: Without dead ends: 4540 [2021-07-13 18:17:42,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:17:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2021-07-13 18:17:42,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 3535. [2021-07-13 18:17:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 2.7637238256932655) internal successors, (9767), 3534 states have internal predecessors, (9767), 0 states have call successors, (0), 0 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 18:17:42,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 9767 transitions. [2021-07-13 18:17:42,112 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 9767 transitions. Word has length 57 [2021-07-13 18:17:42,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:42,112 INFO L482 AbstractCegarLoop]: Abstraction has 3535 states and 9767 transitions. [2021-07-13 18:17:42,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 18:17:42,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 9767 transitions. [2021-07-13 18:17:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 18:17:42,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:42,118 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 18:17:42,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 18:17:42,340 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1575111062, now seen corresponding path program 6 times [2021-07-13 18:17:42,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:42,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637435143] [2021-07-13 18:17:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:42,433 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 18:17:42,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:42,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637435143] [2021-07-13 18:17:42,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637435143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:42,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890421932] [2021-07-13 18:17:42,434 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:42,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 18:17:42,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:42,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:17:42,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:42,636 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 18:17:42,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890421932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:42,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:42,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-07-13 18:17:42,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821122778] [2021-07-13 18:17:42,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 18:17:42,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:42,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 18:17:42,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:17:42,638 INFO L87 Difference]: Start difference. First operand 3535 states and 9767 transitions. Second operand has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 18:17:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:42,930 INFO L93 Difference]: Finished difference Result 6127 states and 16569 transitions. [2021-07-13 18:17:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:17:42,930 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 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 18:17:42,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:42,939 INFO L225 Difference]: With dead ends: 6127 [2021-07-13 18:17:42,939 INFO L226 Difference]: Without dead ends: 5745 [2021-07-13 18:17:42,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 269.1ms TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-07-13 18:17:42,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2021-07-13 18:17:43,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 3442. [2021-07-13 18:17:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3442 states, 3441 states have (on average 2.7625690206335367) internal successors, (9506), 3441 states have internal predecessors, (9506), 0 states have call successors, (0), 0 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 18:17:43,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 9506 transitions. [2021-07-13 18:17:43,022 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 9506 transitions. Word has length 57 [2021-07-13 18:17:43,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:43,023 INFO L482 AbstractCegarLoop]: Abstraction has 3442 states and 9506 transitions. [2021-07-13 18:17:43,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 18:17:43,023 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 9506 transitions. [2021-07-13 18:17:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 18:17:43,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:43,029 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:43,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 18:17:43,245 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:43,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:43,245 INFO L82 PathProgramCache]: Analyzing trace with hash 948902018, now seen corresponding path program 5 times [2021-07-13 18:17:43,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:43,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794250731] [2021-07-13 18:17:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:43,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:43,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794250731] [2021-07-13 18:17:43,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794250731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:43,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599320406] [2021-07-13 18:17:43,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:43,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 18:17:43,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:43,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:17:43,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:43,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599320406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:43,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:43,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 18:17:43,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804035802] [2021-07-13 18:17:43,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:17:43,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:43,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:17:43,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:17:43,626 INFO L87 Difference]: Start difference. First operand 3442 states and 9506 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 18:17:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:43,917 INFO L93 Difference]: Finished difference Result 4903 states and 12991 transitions. [2021-07-13 18:17:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:17:43,917 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 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 18:17:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:43,926 INFO L225 Difference]: With dead ends: 4903 [2021-07-13 18:17:43,927 INFO L226 Difference]: Without dead ends: 4751 [2021-07-13 18:17:43,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 324.4ms TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:17:43,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-07-13 18:17:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3495. [2021-07-13 18:17:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 3494 states have (on average 2.757298225529479) internal successors, (9634), 3494 states have internal predecessors, (9634), 0 states have call successors, (0), 0 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 18:17:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 9634 transitions. [2021-07-13 18:17:44,013 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 9634 transitions. Word has length 57 [2021-07-13 18:17:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:44,013 INFO L482 AbstractCegarLoop]: Abstraction has 3495 states and 9634 transitions. [2021-07-13 18:17:44,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 18:17:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 9634 transitions. [2021-07-13 18:17:44,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 18:17:44,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:44,018 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:44,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 18:17:44,219 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:44,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:44,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1297423950, now seen corresponding path program 6 times [2021-07-13 18:17:44,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:44,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111843587] [2021-07-13 18:17:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:44,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:44,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111843587] [2021-07-13 18:17:44,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111843587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:44,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938478669] [2021-07-13 18:17:44,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:44,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 18:17:44,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:44,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:17:44,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:44,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938478669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:44,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:44,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 18:17:44,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671615389] [2021-07-13 18:17:44,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:17:44,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:44,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:17:44,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:17:44,611 INFO L87 Difference]: Start difference. First operand 3495 states and 9634 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 18:17:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:44,955 INFO L93 Difference]: Finished difference Result 5102 states and 13767 transitions. [2021-07-13 18:17:44,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:17:44,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 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 18:17:44,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:44,964 INFO L225 Difference]: With dead ends: 5102 [2021-07-13 18:17:44,964 INFO L226 Difference]: Without dead ends: 4950 [2021-07-13 18:17:44,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 380.3ms TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:17:44,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4950 states. [2021-07-13 18:17:45,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4950 to 3615. [2021-07-13 18:17:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3614 states have (on average 2.7695074709463197) internal successors, (10009), 3614 states have internal predecessors, (10009), 0 states have call successors, (0), 0 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 18:17:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 10009 transitions. [2021-07-13 18:17:45,051 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 10009 transitions. Word has length 57 [2021-07-13 18:17:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:45,051 INFO L482 AbstractCegarLoop]: Abstraction has 3615 states and 10009 transitions. [2021-07-13 18:17:45,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 18:17:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 10009 transitions. [2021-07-13 18:17:45,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 18:17:45,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:45,058 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:45,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 18:17:45,273 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:45,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:45,273 INFO L82 PathProgramCache]: Analyzing trace with hash -602695052, now seen corresponding path program 7 times [2021-07-13 18:17:45,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:45,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41297461] [2021-07-13 18:17:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:45,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:45,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41297461] [2021-07-13 18:17:45,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41297461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:45,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083752791] [2021-07-13 18:17:45,359 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:45,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:17:45,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:45,966 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 14 [2021-07-13 18:17:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:45,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083752791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:46,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:46,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 18:17:46,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389829731] [2021-07-13 18:17:46,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:17:46,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:46,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:17:46,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:17:46,001 INFO L87 Difference]: Start difference. First operand 3615 states and 10009 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 18:17:46,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:46,723 INFO L93 Difference]: Finished difference Result 7316 states and 19720 transitions. [2021-07-13 18:17:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 18:17:46,724 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 18:17:46,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:46,735 INFO L225 Difference]: With dead ends: 7316 [2021-07-13 18:17:46,735 INFO L226 Difference]: Without dead ends: 6758 [2021-07-13 18:17:46,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 888.8ms TimeCoverageRelationStatistics Valid=483, Invalid=1869, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 18:17:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6758 states. [2021-07-13 18:17:46,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6758 to 3478. [2021-07-13 18:17:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3477 states have (on average 2.7822835777969512) internal successors, (9674), 3477 states have internal predecessors, (9674), 0 states have call successors, (0), 0 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 18:17:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 9674 transitions. [2021-07-13 18:17:46,805 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 9674 transitions. Word has length 57 [2021-07-13 18:17:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:46,806 INFO L482 AbstractCegarLoop]: Abstraction has 3478 states and 9674 transitions. [2021-07-13 18:17:46,806 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 18:17:46,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 9674 transitions. [2021-07-13 18:17:46,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 18:17:46,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:46,810 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:47,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:47,033 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:47,033 INFO L82 PathProgramCache]: Analyzing trace with hash -271054540, now seen corresponding path program 8 times [2021-07-13 18:17:47,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:47,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206867155] [2021-07-13 18:17:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:47,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:47,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206867155] [2021-07-13 18:17:47,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206867155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:47,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39066029] [2021-07-13 18:17:47,130 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:47,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:17:47,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:47,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:17:47,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:47,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39066029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:47,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:47,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 18:17:47,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970643770] [2021-07-13 18:17:47,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:17:47,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:47,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:17:47,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:17:47,460 INFO L87 Difference]: Start difference. First operand 3478 states and 9674 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 18:17:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:47,844 INFO L93 Difference]: Finished difference Result 5207 states and 13699 transitions. [2021-07-13 18:17:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:17:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 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 18:17:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:47,854 INFO L225 Difference]: With dead ends: 5207 [2021-07-13 18:17:47,854 INFO L226 Difference]: Without dead ends: 5055 [2021-07-13 18:17:47,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-07-13 18:17:47,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5055 states. [2021-07-13 18:17:47,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5055 to 3543. [2021-07-13 18:17:47,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 2.7707509881422925) internal successors, (9814), 3542 states have internal predecessors, (9814), 0 states have call successors, (0), 0 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 18:17:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 9814 transitions. [2021-07-13 18:17:47,908 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 9814 transitions. Word has length 57 [2021-07-13 18:17:47,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:47,908 INFO L482 AbstractCegarLoop]: Abstraction has 3543 states and 9814 transitions. [2021-07-13 18:17:47,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 18:17:47,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 9814 transitions. [2021-07-13 18:17:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 18:17:47,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:47,912 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:48,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 18:17:48,113 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:48,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:48,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1943190760, now seen corresponding path program 9 times [2021-07-13 18:17:48,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:48,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837971523] [2021-07-13 18:17:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:48,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:48,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837971523] [2021-07-13 18:17:48,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837971523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:48,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848659910] [2021-07-13 18:17:48,200 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:48,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 18:17:48,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:48,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:17:48,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:48,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848659910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:48,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:48,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 18:17:48,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358553008] [2021-07-13 18:17:48,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:17:48,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:48,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:17:48,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:17:48,491 INFO L87 Difference]: Start difference. First operand 3543 states and 9814 transitions. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 18:17:48,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:48,933 INFO L93 Difference]: Finished difference Result 5749 states and 15067 transitions. [2021-07-13 18:17:48,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:17:48,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 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 18:17:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:48,940 INFO L225 Difference]: With dead ends: 5749 [2021-07-13 18:17:48,940 INFO L226 Difference]: Without dead ends: 5509 [2021-07-13 18:17:48,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:17:48,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5509 states. [2021-07-13 18:17:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5509 to 3668. [2021-07-13 18:17:48,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3668 states, 3667 states have (on average 2.775838560130897) internal successors, (10179), 3667 states have internal predecessors, (10179), 0 states have call successors, (0), 0 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 18:17:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 10179 transitions. [2021-07-13 18:17:48,999 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 10179 transitions. Word has length 57 [2021-07-13 18:17:48,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:48,999 INFO L482 AbstractCegarLoop]: Abstraction has 3668 states and 10179 transitions. [2021-07-13 18:17:48,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 18:17:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 10179 transitions. [2021-07-13 18:17:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 18:17:49,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:49,004 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:49,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:49,204 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:49,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:49,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1035779994, now seen corresponding path program 10 times [2021-07-13 18:17:49,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:49,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351794401] [2021-07-13 18:17:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:49,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:49,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351794401] [2021-07-13 18:17:49,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351794401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:49,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874945695] [2021-07-13 18:17:49,292 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:49,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:17:49,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:49,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:17:49,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:17:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:49,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874945695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:49,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:17:49,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 18:17:49,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982771084] [2021-07-13 18:17:49,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:17:49,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:17:49,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:17:49,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:17:49,566 INFO L87 Difference]: Start difference. First operand 3668 states and 10179 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 18:17:50,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:17:50,040 INFO L93 Difference]: Finished difference Result 6147 states and 16560 transitions. [2021-07-13 18:17:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:17:50,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 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 18:17:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:17:50,048 INFO L225 Difference]: With dead ends: 6147 [2021-07-13 18:17:50,048 INFO L226 Difference]: Without dead ends: 5995 [2021-07-13 18:17:50,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 482.0ms TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:17:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2021-07-13 18:17:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 3798. [2021-07-13 18:17:50,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 2.809849881485383) internal successors, (10669), 3797 states have internal predecessors, (10669), 0 states have call successors, (0), 0 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 18:17:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 10669 transitions. [2021-07-13 18:17:50,102 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 10669 transitions. Word has length 57 [2021-07-13 18:17:50,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:17:50,103 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 10669 transitions. [2021-07-13 18:17:50,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 18:17:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 10669 transitions. [2021-07-13 18:17:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 18:17:50,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:17:50,107 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:17:50,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 18:17:50,309 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:17:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:17:50,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1096247506, now seen corresponding path program 11 times [2021-07-13 18:17:50,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:17:50,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350438462] [2021-07-13 18:17:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:17:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:17:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:17:50,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:17:50,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350438462] [2021-07-13 18:17:50,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350438462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:17:50,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250059180] [2021-07-13 18:17:50,432 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:17:50,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 18:17:50,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:17:50,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:17:50,491 INFO L286 TraceCheckSpWp]: Computing forward predicates...