/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-14 23:55:40,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-14 23:55:40,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-14 23:55:40,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-14 23:55:40,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-14 23:55:40,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-14 23:55:40,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-14 23:55:40,779 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 [2021-04-14 23:55:40,801 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-14 23:55:40,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-14 23:55:40,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-14 23:55:40,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-14 23:55:40,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-14 23:55:40,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-14 23:55:40,803 INFO L138 SettingsManager]: * Use SBE=true [2021-04-14 23:55:40,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-14 23:55:40,804 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-14 23:55:40,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-14 23:55:40,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-14 23:55:40,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-14 23:55:40,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-14 23:55:40,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-14 23:55:40,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-14 23:55:40,805 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-14 23:55:40,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-14 23:55:40,805 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-14 23:55:40,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-14 23:55:40,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-14 23:55:40,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-14 23:55:40,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-14 23:55:40,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-14 23:55:40,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-14 23:55:40,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-14 23:55:40,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-14 23:55:40,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-14 23:55:40,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-14 23:55:40,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-14 23:55:40,806 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-14 23:55:40,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-14 23:55:40,807 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-14 23:55:41,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-14 23:55:41,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-14 23:55:41,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-14 23:55:41,083 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-14 23:55:41,084 INFO L275 PluginConnector]: CDTParser initialized [2021-04-14 23:55:41,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2021-04-14 23:55:41,144 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/484a6b742/d103008d35224828bd957cfdaee23b52/FLAGba155aba8 [2021-04-14 23:55:41,667 INFO L306 CDTParser]: Found 1 translation units. [2021-04-14 23:55:41,667 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2021-04-14 23:55:41,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/484a6b742/d103008d35224828bd957cfdaee23b52/FLAGba155aba8 [2021-04-14 23:55:42,153 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/484a6b742/d103008d35224828bd957cfdaee23b52 [2021-04-14 23:55:42,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-14 23:55:42,161 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-04-14 23:55:42,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-14 23:55:42,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-14 23:55:42,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-14 23:55:42,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 11:55:42" (1/1) ... [2021-04-14 23:55:42,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd5c882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:55:42, skipping insertion in model container [2021-04-14 23:55:42,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 11:55:42" (1/1) ... [2021-04-14 23:55:42,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-14 23:55:42,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-14 23:55:42,505 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i[30952,30965] [2021-04-14 23:55:42,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-14 23:55:42,516 INFO L203 MainTranslator]: Completed pre-run [2021-04-14 23:55:42,569 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i[30952,30965] [2021-04-14 23:55:42,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-14 23:55:42,644 INFO L208 MainTranslator]: Completed translation [2021-04-14 23:55:42,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:55:42 WrapperNode [2021-04-14 23:55:42,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-14 23:55:42,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-14 23:55:42,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-14 23:55:42,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-14 23:55:42,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:55:42" (1/1) ... [2021-04-14 23:55:42,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:55:42" (1/1) ... [2021-04-14 23:55:42,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-14 23:55:42,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-14 23:55:42,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-14 23:55:42,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-14 23:55:42,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:55:42" (1/1) ... [2021-04-14 23:55:42,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:55:42" (1/1) ... [2021-04-14 23:55:42,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:55:42" (1/1) ... [2021-04-14 23:55:42,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:55:42" (1/1) ... [2021-04-14 23:55:42,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:55:42" (1/1) ... [2021-04-14 23:55:42,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:55:42" (1/1) ... [2021-04-14 23:55:42,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:55:42" (1/1) ... [2021-04-14 23:55:42,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-14 23:55:42,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-14 23:55:42,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-14 23:55:42,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-14 23:55:42,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:55:42" (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 [2021-04-14 23:55:42,804 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-04-14 23:55:42,805 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-04-14 23:55:42,805 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-04-14 23:55:42,806 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-04-14 23:55:42,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-14 23:55:42,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-04-14 23:55:42,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-14 23:55:42,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-14 23:55:42,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-14 23:55:42,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-04-14 23:55:42,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-14 23:55:42,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-14 23:55:42,809 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-14 23:55:43,190 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-14 23:55:43,191 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-04-14 23:55:43,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.04 11:55:43 BoogieIcfgContainer [2021-04-14 23:55:43,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-14 23:55:43,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-14 23:55:43,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-14 23:55:43,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-14 23:55:43,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.04 11:55:42" (1/3) ... [2021-04-14 23:55:43,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27eddd8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 11:55:43, skipping insertion in model container [2021-04-14 23:55:43,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:55:42" (2/3) ... [2021-04-14 23:55:43,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27eddd8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 11:55:43, skipping insertion in model container [2021-04-14 23:55:43,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.04 11:55:43" (3/3) ... [2021-04-14 23:55:43,201 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2021-04-14 23:55:43,206 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-14 23:55:43,206 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-14 23:55:43,210 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-14 23:55:43,211 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-14 23:55:43,238 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,239 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,239 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,239 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,239 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,239 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,239 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,239 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,240 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,240 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,240 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,240 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,241 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,241 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,241 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,241 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,241 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,241 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,242 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,242 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,242 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,243 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,243 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,243 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,243 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,244 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,244 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,244 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,245 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,245 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,245 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,245 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,245 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,246 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,246 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,246 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,246 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,246 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,246 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,247 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,247 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,247 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,247 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,247 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,247 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,247 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,248 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,248 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,248 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,248 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,248 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,248 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,248 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,249 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,249 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,249 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,251 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,251 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,251 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,251 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,251 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,251 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,257 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,257 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,257 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,257 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,258 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,258 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:55:43,259 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-04-14 23:55:43,273 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-14 23:55:43,299 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-14 23:55:43,299 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-14 23:55:43,300 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-14 23:55:43,300 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-14 23:55:43,300 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-14 23:55:43,300 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-14 23:55:43,300 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-14 23:55:43,300 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-14 23:55:43,308 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 62 places, 60 transitions, 130 flow [2021-04-14 23:55:43,379 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1548 states, 1546 states have (on average 3.1571798188874514) internal successors, (4881), 1547 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:43,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 1548 states, 1546 states have (on average 3.1571798188874514) internal successors, (4881), 1547 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-14 23:55:43,393 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:43,393 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:55:43,394 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:43,398 INFO L82 PathProgramCache]: Analyzing trace with hash 962891533, now seen corresponding path program 1 times [2021-04-14 23:55:43,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:43,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028167561] [2021-04-14 23:55:43,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:43,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028167561] [2021-04-14 23:55:43,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-14 23:55:43,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-14 23:55:43,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992751086] [2021-04-14 23:55:43,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-14 23:55:43,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:43,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-14 23:55:43,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-14 23:55:43,778 INFO L87 Difference]: Start difference. First operand has 1548 states, 1546 states have (on average 3.1571798188874514) internal successors, (4881), 1547 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:43,938 INFO L93 Difference]: Finished difference Result 3048 states and 8864 transitions. [2021-04-14 23:55:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-14 23:55:43,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-14 23:55:43,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:43,960 INFO L225 Difference]: With dead ends: 3048 [2021-04-14 23:55:43,960 INFO L226 Difference]: Without dead ends: 1032 [2021-04-14 23:55:43,961 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-14 23:55:43,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-04-14 23:55:44,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 648. [2021-04-14 23:55:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7171561051004636) internal successors, (1758), 647 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1758 transitions. [2021-04-14 23:55:44,032 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1758 transitions. Word has length 26 [2021-04-14 23:55:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:44,032 INFO L480 AbstractCegarLoop]: Abstraction has 648 states and 1758 transitions. [2021-04-14 23:55:44,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:44,033 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1758 transitions. [2021-04-14 23:55:44,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-14 23:55:44,036 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:44,036 INFO L551 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] [2021-04-14 23:55:44,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-14 23:55:44,037 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:44,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:44,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1660854806, now seen corresponding path program 1 times [2021-04-14 23:55:44,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:44,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504712947] [2021-04-14 23:55:44,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:44,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504712947] [2021-04-14 23:55:44,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-14 23:55:44,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-14 23:55:44,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549182626] [2021-04-14 23:55:44,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-14 23:55:44,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:44,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-14 23:55:44,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-14 23:55:44,156 INFO L87 Difference]: Start difference. First operand 648 states and 1758 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:44,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:44,253 INFO L93 Difference]: Finished difference Result 1627 states and 4316 transitions. [2021-04-14 23:55:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-14 23:55:44,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-04-14 23:55:44,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:44,265 INFO L225 Difference]: With dead ends: 1627 [2021-04-14 23:55:44,265 INFO L226 Difference]: Without dead ends: 1371 [2021-04-14 23:55:44,277 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-14 23:55:44,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-04-14 23:55:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 822. [2021-04-14 23:55:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 2.705237515225335) internal successors, (2221), 821 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2221 transitions. [2021-04-14 23:55:44,313 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2221 transitions. Word has length 30 [2021-04-14 23:55:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:44,313 INFO L480 AbstractCegarLoop]: Abstraction has 822 states and 2221 transitions. [2021-04-14 23:55:44,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:44,313 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2221 transitions. [2021-04-14 23:55:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-14 23:55:44,316 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:44,316 INFO L551 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] [2021-04-14 23:55:44,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-14 23:55:44,316 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:44,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1932703408, now seen corresponding path program 2 times [2021-04-14 23:55:44,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:44,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655840544] [2021-04-14 23:55:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:44,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655840544] [2021-04-14 23:55:44,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-14 23:55:44,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-14 23:55:44,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255322373] [2021-04-14 23:55:44,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-14 23:55:44,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:44,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-14 23:55:44,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-14 23:55:44,416 INFO L87 Difference]: Start difference. First operand 822 states and 2221 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:44,558 INFO L93 Difference]: Finished difference Result 1099 states and 2837 transitions. [2021-04-14 23:55:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-14 23:55:44,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-04-14 23:55:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:44,566 INFO L225 Difference]: With dead ends: 1099 [2021-04-14 23:55:44,566 INFO L226 Difference]: Without dead ends: 774 [2021-04-14 23:55:44,567 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-14 23:55:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-04-14 23:55:44,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 682. [2021-04-14 23:55:44,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 2.6637298091042583) internal successors, (1814), 681 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1814 transitions. [2021-04-14 23:55:44,591 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1814 transitions. Word has length 30 [2021-04-14 23:55:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:44,591 INFO L480 AbstractCegarLoop]: Abstraction has 682 states and 1814 transitions. [2021-04-14 23:55:44,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1814 transitions. [2021-04-14 23:55:44,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-14 23:55:44,594 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:44,594 INFO L551 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] [2021-04-14 23:55:44,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-14 23:55:44,594 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:44,595 INFO L82 PathProgramCache]: Analyzing trace with hash 815370861, now seen corresponding path program 1 times [2021-04-14 23:55:44,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:44,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230497472] [2021-04-14 23:55:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:44,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230497472] [2021-04-14 23:55:44,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-14 23:55:44,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-14 23:55:44,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430338568] [2021-04-14 23:55:44,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-14 23:55:44,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:44,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-14 23:55:44,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-04-14 23:55:44,816 INFO L87 Difference]: Start difference. First operand 682 states and 1814 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:44,950 INFO L93 Difference]: Finished difference Result 1442 states and 3782 transitions. [2021-04-14 23:55:44,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-14 23:55:44,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-04-14 23:55:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:44,956 INFO L225 Difference]: With dead ends: 1442 [2021-04-14 23:55:44,957 INFO L226 Difference]: Without dead ends: 1175 [2021-04-14 23:55:44,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-14 23:55:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-04-14 23:55:44,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 727. [2021-04-14 23:55:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 2.62534435261708) internal successors, (1906), 726 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1906 transitions. [2021-04-14 23:55:44,985 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1906 transitions. Word has length 34 [2021-04-14 23:55:44,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:44,985 INFO L480 AbstractCegarLoop]: Abstraction has 727 states and 1906 transitions. [2021-04-14 23:55:44,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1906 transitions. [2021-04-14 23:55:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-14 23:55:44,993 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:44,993 INFO L551 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] [2021-04-14 23:55:44,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-14 23:55:44,994 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:44,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1916820389, now seen corresponding path program 2 times [2021-04-14 23:55:44,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:44,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708680602] [2021-04-14 23:55:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:45,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708680602] [2021-04-14 23:55:45,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-14 23:55:45,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-14 23:55:45,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118595263] [2021-04-14 23:55:45,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-14 23:55:45,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:45,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-14 23:55:45,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-04-14 23:55:45,122 INFO L87 Difference]: Start difference. First operand 727 states and 1906 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:45,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:45,242 INFO L93 Difference]: Finished difference Result 1881 states and 4916 transitions. [2021-04-14 23:55:45,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-14 23:55:45,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-04-14 23:55:45,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:45,251 INFO L225 Difference]: With dead ends: 1881 [2021-04-14 23:55:45,251 INFO L226 Difference]: Without dead ends: 1614 [2021-04-14 23:55:45,252 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-14 23:55:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-04-14 23:55:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 821. [2021-04-14 23:55:45,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.7085365853658536) internal successors, (2221), 820 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:45,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2221 transitions. [2021-04-14 23:55:45,284 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2221 transitions. Word has length 34 [2021-04-14 23:55:45,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:45,285 INFO L480 AbstractCegarLoop]: Abstraction has 821 states and 2221 transitions. [2021-04-14 23:55:45,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:45,286 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2221 transitions. [2021-04-14 23:55:45,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-14 23:55:45,287 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:45,287 INFO L551 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] [2021-04-14 23:55:45,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-14 23:55:45,287 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:45,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:45,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1894477139, now seen corresponding path program 3 times [2021-04-14 23:55:45,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:45,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137212361] [2021-04-14 23:55:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:45,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137212361] [2021-04-14 23:55:45,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-14 23:55:45,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-14 23:55:45,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273904416] [2021-04-14 23:55:45,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-14 23:55:45,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:45,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-14 23:55:45,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-14 23:55:45,409 INFO L87 Difference]: Start difference. First operand 821 states and 2221 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:45,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:45,540 INFO L93 Difference]: Finished difference Result 1149 states and 2989 transitions. [2021-04-14 23:55:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-14 23:55:45,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-04-14 23:55:45,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:45,545 INFO L225 Difference]: With dead ends: 1149 [2021-04-14 23:55:45,545 INFO L226 Difference]: Without dead ends: 813 [2021-04-14 23:55:45,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-14 23:55:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-04-14 23:55:45,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 694. [2021-04-14 23:55:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.6507936507936507) internal successors, (1837), 693 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1837 transitions. [2021-04-14 23:55:45,561 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1837 transitions. Word has length 34 [2021-04-14 23:55:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:45,562 INFO L480 AbstractCegarLoop]: Abstraction has 694 states and 1837 transitions. [2021-04-14 23:55:45,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1837 transitions. [2021-04-14 23:55:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-14 23:55:45,563 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:45,563 INFO L551 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] [2021-04-14 23:55:45,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-14 23:55:45,563 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:45,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:45,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1589715209, now seen corresponding path program 4 times [2021-04-14 23:55:45,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:45,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55570457] [2021-04-14 23:55:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:45,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55570457] [2021-04-14 23:55:45,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-14 23:55:45,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-14 23:55:45,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558020690] [2021-04-14 23:55:45,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-14 23:55:45,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:45,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-14 23:55:45,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-14 23:55:45,673 INFO L87 Difference]: Start difference. First operand 694 states and 1837 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:45,830 INFO L93 Difference]: Finished difference Result 1146 states and 2975 transitions. [2021-04-14 23:55:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-14 23:55:45,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-04-14 23:55:45,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:45,836 INFO L225 Difference]: With dead ends: 1146 [2021-04-14 23:55:45,836 INFO L226 Difference]: Without dead ends: 922 [2021-04-14 23:55:45,837 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-04-14 23:55:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-04-14 23:55:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 804. [2021-04-14 23:55:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 2.6986301369863015) internal successors, (2167), 803 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2167 transitions. [2021-04-14 23:55:45,871 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2167 transitions. Word has length 34 [2021-04-14 23:55:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:45,871 INFO L480 AbstractCegarLoop]: Abstraction has 804 states and 2167 transitions. [2021-04-14 23:55:45,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2167 transitions. [2021-04-14 23:55:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-14 23:55:45,873 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:45,873 INFO L551 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] [2021-04-14 23:55:45,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-14 23:55:45,873 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:45,874 INFO L82 PathProgramCache]: Analyzing trace with hash 583669760, now seen corresponding path program 1 times [2021-04-14 23:55:45,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:45,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424602432] [2021-04-14 23:55:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:45,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424602432] [2021-04-14 23:55:45,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173389558] [2021-04-14 23:55:45,950 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 [2021-04-14 23:55:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:46,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-14 23:55:46,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:46,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:46,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-14 23:55:46,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455726259] [2021-04-14 23:55:46,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-14 23:55:46,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:46,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-14 23:55:46,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-04-14 23:55:46,231 INFO L87 Difference]: Start difference. First operand 804 states and 2167 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:46,344 INFO L93 Difference]: Finished difference Result 1202 states and 3091 transitions. [2021-04-14 23:55:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-14 23:55:46,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-04-14 23:55:46,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:46,349 INFO L225 Difference]: With dead ends: 1202 [2021-04-14 23:55:46,350 INFO L226 Difference]: Without dead ends: 932 [2021-04-14 23:55:46,350 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-14 23:55:46,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-04-14 23:55:46,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 849. [2021-04-14 23:55:46,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 2.661556603773585) internal successors, (2257), 848 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2257 transitions. [2021-04-14 23:55:46,379 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2257 transitions. Word has length 39 [2021-04-14 23:55:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:46,379 INFO L480 AbstractCegarLoop]: Abstraction has 849 states and 2257 transitions. [2021-04-14 23:55:46,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2257 transitions. [2021-04-14 23:55:46,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-14 23:55:46,381 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:46,381 INFO L551 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] [2021-04-14 23:55:46,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-04-14 23:55:46,603 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:46,603 INFO L82 PathProgramCache]: Analyzing trace with hash 550525025, now seen corresponding path program 1 times [2021-04-14 23:55:46,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:46,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236947461] [2021-04-14 23:55:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:46,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236947461] [2021-04-14 23:55:46,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095449785] [2021-04-14 23:55:46,719 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 [2021-04-14 23:55:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:46,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-14 23:55:46,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:46,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:46,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-14 23:55:46,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446434342] [2021-04-14 23:55:46,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-14 23:55:46,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:46,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-14 23:55:46,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-14 23:55:46,930 INFO L87 Difference]: Start difference. First operand 849 states and 2257 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-04-14 23:55:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:47,081 INFO L93 Difference]: Finished difference Result 1701 states and 4409 transitions. [2021-04-14 23:55:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-14 23:55:47,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 39 [2021-04-14 23:55:47,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:47,086 INFO L225 Difference]: With dead ends: 1701 [2021-04-14 23:55:47,086 INFO L226 Difference]: Without dead ends: 1277 [2021-04-14 23:55:47,086 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:55:47,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-04-14 23:55:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1012. [2021-04-14 23:55:47,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.6340257171117707) internal successors, (2663), 1011 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:47,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 2663 transitions. [2021-04-14 23:55:47,112 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 2663 transitions. Word has length 39 [2021-04-14 23:55:47,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:47,113 INFO L480 AbstractCegarLoop]: Abstraction has 1012 states and 2663 transitions. [2021-04-14 23:55:47,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-04-14 23:55:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 2663 transitions. [2021-04-14 23:55:47,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-04-14 23:55:47,117 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:47,118 INFO L551 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] [2021-04-14 23:55:47,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:55:47,333 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash -44610840, now seen corresponding path program 1 times [2021-04-14 23:55:47,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:47,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872946351] [2021-04-14 23:55:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:47,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872946351] [2021-04-14 23:55:47,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137092258] [2021-04-14 23:55:47,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-04-14 23:55:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:47,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-14 23:55:47,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:47,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:47,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-14 23:55:47,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861208682] [2021-04-14 23:55:47,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-14 23:55:47,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:47,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-14 23:55:47,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-04-14 23:55:47,584 INFO L87 Difference]: Start difference. First operand 1012 states and 2663 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:47,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:47,804 INFO L93 Difference]: Finished difference Result 1898 states and 4994 transitions. [2021-04-14 23:55:47,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-14 23:55:47,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 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 44 [2021-04-14 23:55:47,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:47,810 INFO L225 Difference]: With dead ends: 1898 [2021-04-14 23:55:47,810 INFO L226 Difference]: Without dead ends: 1397 [2021-04-14 23:55:47,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-04-14 23:55:47,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-04-14 23:55:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1142. [2021-04-14 23:55:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 2.7020157756354077) internal successors, (3083), 1141 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3083 transitions. [2021-04-14 23:55:47,836 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3083 transitions. Word has length 44 [2021-04-14 23:55:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:47,837 INFO L480 AbstractCegarLoop]: Abstraction has 1142 states and 3083 transitions. [2021-04-14 23:55:47,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3083 transitions. [2021-04-14 23:55:47,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-04-14 23:55:47,839 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:47,839 INFO L551 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] [2021-04-14 23:55:48,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-04-14 23:55:48,061 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:48,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:48,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2043440179, now seen corresponding path program 2 times [2021-04-14 23:55:48,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:48,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923358280] [2021-04-14 23:55:48,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:55:48,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923358280] [2021-04-14 23:55:48,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901140893] [2021-04-14 23:55:48,193 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 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 [2021-04-14 23:55:48,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:55:48,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:55:48,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-14 23:55:48,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:55:48,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:48,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-04-14 23:55:48,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793339565] [2021-04-14 23:55:48,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-14 23:55:48,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:48,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-14 23:55:48,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-04-14 23:55:48,419 INFO L87 Difference]: Start difference. First operand 1142 states and 3083 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:48,604 INFO L93 Difference]: Finished difference Result 2037 states and 5193 transitions. [2021-04-14 23:55:48,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-14 23:55:48,604 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 49 [2021-04-14 23:55:48,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:48,611 INFO L225 Difference]: With dead ends: 2037 [2021-04-14 23:55:48,611 INFO L226 Difference]: Without dead ends: 1673 [2021-04-14 23:55:48,611 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-04-14 23:55:48,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2021-04-14 23:55:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1219. [2021-04-14 23:55:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 2.6576354679802954) internal successors, (3237), 1218 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 3237 transitions. [2021-04-14 23:55:48,639 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 3237 transitions. Word has length 49 [2021-04-14 23:55:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:48,640 INFO L480 AbstractCegarLoop]: Abstraction has 1219 states and 3237 transitions. [2021-04-14 23:55:48,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:48,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 3237 transitions. [2021-04-14 23:55:48,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-04-14 23:55:48,641 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:48,642 INFO L551 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] [2021-04-14 23:55:48,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:55:48,864 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:48,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:48,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1890962021, now seen corresponding path program 3 times [2021-04-14 23:55:48,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:48,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769179673] [2021-04-14 23:55:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:55:48,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769179673] [2021-04-14 23:55:48,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415774312] [2021-04-14 23:55:48,941 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 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 [2021-04-14 23:55:49,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-14 23:55:49,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:55:49,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-14 23:55:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:55:49,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:49,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-14 23:55:49,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490585340] [2021-04-14 23:55:49,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-14 23:55:49,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:49,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-14 23:55:49,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-14 23:55:49,115 INFO L87 Difference]: Start difference. First operand 1219 states and 3237 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:49,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:49,229 INFO L93 Difference]: Finished difference Result 1872 states and 4671 transitions. [2021-04-14 23:55:49,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-14 23:55:49,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 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 49 [2021-04-14 23:55:49,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:49,236 INFO L225 Difference]: With dead ends: 1872 [2021-04-14 23:55:49,236 INFO L226 Difference]: Without dead ends: 1587 [2021-04-14 23:55:49,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-04-14 23:55:49,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-04-14 23:55:49,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1199. [2021-04-14 23:55:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 2.6686143572621037) internal successors, (3197), 1198 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 3197 transitions. [2021-04-14 23:55:49,278 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 3197 transitions. Word has length 49 [2021-04-14 23:55:49,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:49,278 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 3197 transitions. [2021-04-14 23:55:49,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:49,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 3197 transitions. [2021-04-14 23:55:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-04-14 23:55:49,280 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:49,280 INFO L551 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] [2021-04-14 23:55:49,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-14 23:55:49,501 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:49,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:49,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1160280110, now seen corresponding path program 4 times [2021-04-14 23:55:49,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:49,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385231779] [2021-04-14 23:55:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:49,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385231779] [2021-04-14 23:55:49,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947138096] [2021-04-14 23:55:49,573 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 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 [2021-04-14 23:55:49,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:55:49,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:55:49,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-14 23:55:49,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:49,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:49,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-14 23:55:49,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162065280] [2021-04-14 23:55:49,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-14 23:55:49,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:49,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-14 23:55:49,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-14 23:55:49,785 INFO L87 Difference]: Start difference. First operand 1199 states and 3197 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:49,991 INFO L93 Difference]: Finished difference Result 1978 states and 5159 transitions. [2021-04-14 23:55:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-14 23:55:49,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 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 49 [2021-04-14 23:55:49,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:49,997 INFO L225 Difference]: With dead ends: 1978 [2021-04-14 23:55:49,997 INFO L226 Difference]: Without dead ends: 1477 [2021-04-14 23:55:49,998 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-04-14 23:55:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2021-04-14 23:55:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1024. [2021-04-14 23:55:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 2.6803519061583576) internal successors, (2742), 1023 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 2742 transitions. [2021-04-14 23:55:50,036 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 2742 transitions. Word has length 49 [2021-04-14 23:55:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:50,036 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 2742 transitions. [2021-04-14 23:55:50,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 2742 transitions. [2021-04-14 23:55:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-04-14 23:55:50,038 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:50,038 INFO L551 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] [2021-04-14 23:55:50,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:55:50,253 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:50,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:50,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1269373437, now seen corresponding path program 5 times [2021-04-14 23:55:50,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:50,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687337871] [2021-04-14 23:55:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:50,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687337871] [2021-04-14 23:55:50,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977498751] [2021-04-14 23:55:50,350 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 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 [2021-04-14 23:55:50,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-14 23:55:50,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:55:50,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-14 23:55:50,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:50,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:50,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-14 23:55:50,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270147201] [2021-04-14 23:55:50,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-14 23:55:50,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:50,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-14 23:55:50,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-04-14 23:55:50,547 INFO L87 Difference]: Start difference. First operand 1024 states and 2742 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:50,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:50,710 INFO L93 Difference]: Finished difference Result 1617 states and 4106 transitions. [2021-04-14 23:55:50,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-14 23:55:50,710 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 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 49 [2021-04-14 23:55:50,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:50,716 INFO L225 Difference]: With dead ends: 1617 [2021-04-14 23:55:50,717 INFO L226 Difference]: Without dead ends: 1347 [2021-04-14 23:55:50,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-04-14 23:55:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-04-14 23:55:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1074. [2021-04-14 23:55:50,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.69524697110904) internal successors, (2892), 1073 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2892 transitions. [2021-04-14 23:55:50,746 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2892 transitions. Word has length 49 [2021-04-14 23:55:50,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:50,746 INFO L480 AbstractCegarLoop]: Abstraction has 1074 states and 2892 transitions. [2021-04-14 23:55:50,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:50,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2892 transitions. [2021-04-14 23:55:50,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-04-14 23:55:50,747 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:50,747 INFO L551 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] [2021-04-14 23:55:50,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-14 23:55:50,969 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:50,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1077315557, now seen corresponding path program 6 times [2021-04-14 23:55:50,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:50,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89778810] [2021-04-14 23:55:50,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:51,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89778810] [2021-04-14 23:55:51,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714863807] [2021-04-14 23:55:51,083 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 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 [2021-04-14 23:55:51,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-14 23:55:51,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:55:51,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-14 23:55:51,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:51,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:51,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-14 23:55:51,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716082461] [2021-04-14 23:55:51,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-14 23:55:51,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:51,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-14 23:55:51,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-04-14 23:55:51,248 INFO L87 Difference]: Start difference. First operand 1074 states and 2892 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:51,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:51,461 INFO L93 Difference]: Finished difference Result 2465 states and 6458 transitions. [2021-04-14 23:55:51,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-14 23:55:51,461 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 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 49 [2021-04-14 23:55:51,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:51,468 INFO L225 Difference]: With dead ends: 2465 [2021-04-14 23:55:51,468 INFO L226 Difference]: Without dead ends: 2195 [2021-04-14 23:55:51,468 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-04-14 23:55:51,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2021-04-14 23:55:51,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1249. [2021-04-14 23:55:51,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 2.7628205128205128) internal successors, (3448), 1248 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 3448 transitions. [2021-04-14 23:55:51,500 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 3448 transitions. Word has length 49 [2021-04-14 23:55:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:51,500 INFO L480 AbstractCegarLoop]: Abstraction has 1249 states and 3448 transitions. [2021-04-14 23:55:51,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:51,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 3448 transitions. [2021-04-14 23:55:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-04-14 23:55:51,502 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:51,502 INFO L551 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] [2021-04-14 23:55:51,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-14 23:55:51,717 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:51,717 INFO L82 PathProgramCache]: Analyzing trace with hash -417742817, now seen corresponding path program 7 times [2021-04-14 23:55:51,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:51,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424857231] [2021-04-14 23:55:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:51,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424857231] [2021-04-14 23:55:51,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207609193] [2021-04-14 23:55:51,806 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 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 [2021-04-14 23:55:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:51,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-14 23:55:51,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:51,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:51,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-04-14 23:55:51,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211626661] [2021-04-14 23:55:51,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-14 23:55:51,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:51,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-14 23:55:51,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-04-14 23:55:51,981 INFO L87 Difference]: Start difference. First operand 1249 states and 3448 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:52,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:52,300 INFO L93 Difference]: Finished difference Result 2219 states and 5806 transitions. [2021-04-14 23:55:52,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-14 23:55:52,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 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 49 [2021-04-14 23:55:52,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:52,305 INFO L225 Difference]: With dead ends: 2219 [2021-04-14 23:55:52,305 INFO L226 Difference]: Without dead ends: 1692 [2021-04-14 23:55:52,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-04-14 23:55:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-04-14 23:55:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1259. [2021-04-14 23:55:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 2.7440381558028615) internal successors, (3452), 1258 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:52,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 3452 transitions. [2021-04-14 23:55:52,350 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 3452 transitions. Word has length 49 [2021-04-14 23:55:52,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:52,351 INFO L480 AbstractCegarLoop]: Abstraction has 1259 states and 3452 transitions. [2021-04-14 23:55:52,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:52,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 3452 transitions. [2021-04-14 23:55:52,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-04-14 23:55:52,353 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:52,354 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-04-14 23:55:52,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:55:52,554 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:52,555 INFO L82 PathProgramCache]: Analyzing trace with hash -255755739, now seen corresponding path program 8 times [2021-04-14 23:55:52,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:52,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438887881] [2021-04-14 23:55:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:52,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438887881] [2021-04-14 23:55:52,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951913186] [2021-04-14 23:55:52,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:55:52,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:55:52,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:55:52,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-14 23:55:52,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:52,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:52,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-04-14 23:55:52,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416272241] [2021-04-14 23:55:52,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-14 23:55:52,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:52,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-14 23:55:52,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-04-14 23:55:52,886 INFO L87 Difference]: Start difference. First operand 1259 states and 3452 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:53,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:53,110 INFO L93 Difference]: Finished difference Result 2049 states and 5352 transitions. [2021-04-14 23:55:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-14 23:55:53,110 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-04-14 23:55:53,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:53,114 INFO L225 Difference]: With dead ends: 2049 [2021-04-14 23:55:53,114 INFO L226 Difference]: Without dead ends: 1715 [2021-04-14 23:55:53,115 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-04-14 23:55:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-04-14 23:55:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1344. [2021-04-14 23:55:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 2.696947133283693) internal successors, (3622), 1343 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:53,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 3622 transitions. [2021-04-14 23:55:53,148 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 3622 transitions. Word has length 54 [2021-04-14 23:55:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:53,148 INFO L480 AbstractCegarLoop]: Abstraction has 1344 states and 3622 transitions. [2021-04-14 23:55:53,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 3622 transitions. [2021-04-14 23:55:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-04-14 23:55:53,154 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:53,154 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-04-14 23:55:53,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:55:53,369 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:53,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:53,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1605031117, now seen corresponding path program 9 times [2021-04-14 23:55:53,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:53,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807808230] [2021-04-14 23:55:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:53,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807808230] [2021-04-14 23:55:53,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336127938] [2021-04-14 23:55:53,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:55:53,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-14 23:55:53,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:55:53,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-14 23:55:53,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:53,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:53,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-14 23:55:53,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72469840] [2021-04-14 23:55:53,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-14 23:55:53,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:53,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-14 23:55:53,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-04-14 23:55:53,635 INFO L87 Difference]: Start difference. First operand 1344 states and 3622 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:53,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:53,788 INFO L93 Difference]: Finished difference Result 2142 states and 5346 transitions. [2021-04-14 23:55:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-14 23:55:53,788 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-04-14 23:55:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:53,792 INFO L225 Difference]: With dead ends: 2142 [2021-04-14 23:55:53,792 INFO L226 Difference]: Without dead ends: 1872 [2021-04-14 23:55:53,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-04-14 23:55:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-04-14 23:55:53,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1359. [2021-04-14 23:55:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 2.6892488954344627) internal successors, (3652), 1358 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 3652 transitions. [2021-04-14 23:55:53,820 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 3652 transitions. Word has length 54 [2021-04-14 23:55:53,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:53,820 INFO L480 AbstractCegarLoop]: Abstraction has 1359 states and 3652 transitions. [2021-04-14 23:55:53,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:53,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 3652 transitions. [2021-04-14 23:55:53,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-04-14 23:55:53,825 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:53,825 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-04-14 23:55:54,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-04-14 23:55:54,048 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:54,048 INFO L82 PathProgramCache]: Analyzing trace with hash -264478893, now seen corresponding path program 10 times [2021-04-14 23:55:54,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:54,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953963905] [2021-04-14 23:55:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:54,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953963905] [2021-04-14 23:55:54,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941051038] [2021-04-14 23:55:54,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:55:54,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:55:54,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:55:54,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-14 23:55:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:54,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:54,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-14 23:55:54,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229054259] [2021-04-14 23:55:54,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-14 23:55:54,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:54,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-14 23:55:54,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-04-14 23:55:54,320 INFO L87 Difference]: Start difference. First operand 1359 states and 3652 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:54,502 INFO L93 Difference]: Finished difference Result 2027 states and 5116 transitions. [2021-04-14 23:55:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-14 23:55:54,503 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-04-14 23:55:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:54,506 INFO L225 Difference]: With dead ends: 2027 [2021-04-14 23:55:54,506 INFO L226 Difference]: Without dead ends: 1757 [2021-04-14 23:55:54,506 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-04-14 23:55:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-04-14 23:55:54,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1359. [2021-04-14 23:55:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 2.6892488954344627) internal successors, (3652), 1358 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 3652 transitions. [2021-04-14 23:55:54,531 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 3652 transitions. Word has length 54 [2021-04-14 23:55:54,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:54,531 INFO L480 AbstractCegarLoop]: Abstraction has 1359 states and 3652 transitions. [2021-04-14 23:55:54,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 3652 transitions. [2021-04-14 23:55:54,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-04-14 23:55:54,533 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:54,533 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-04-14 23:55:54,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:55:54,749 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:54,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:54,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1683799409, now seen corresponding path program 11 times [2021-04-14 23:55:54,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:54,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178773817] [2021-04-14 23:55:54,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:54,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178773817] [2021-04-14 23:55:54,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584301745] [2021-04-14 23:55:54,830 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 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 [2021-04-14 23:55:54,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-14 23:55:54,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:55:54,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-14 23:55:54,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:54,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:54,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-14 23:55:54,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704740846] [2021-04-14 23:55:54,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-14 23:55:54,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:54,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-14 23:55:54,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-04-14 23:55:54,991 INFO L87 Difference]: Start difference. First operand 1359 states and 3652 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:55,210 INFO L93 Difference]: Finished difference Result 2725 states and 7108 transitions. [2021-04-14 23:55:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-14 23:55:55,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-04-14 23:55:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:55,215 INFO L225 Difference]: With dead ends: 2725 [2021-04-14 23:55:55,215 INFO L226 Difference]: Without dead ends: 2455 [2021-04-14 23:55:55,215 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-04-14 23:55:55,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-04-14 23:55:55,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1484. [2021-04-14 23:55:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.729602157788267) internal successors, (4048), 1483 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4048 transitions. [2021-04-14 23:55:55,247 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4048 transitions. Word has length 54 [2021-04-14 23:55:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:55,248 INFO L480 AbstractCegarLoop]: Abstraction has 1484 states and 4048 transitions. [2021-04-14 23:55:55,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4048 transitions. [2021-04-14 23:55:55,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-04-14 23:55:55,250 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:55,250 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-04-14 23:55:55,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-14 23:55:55,472 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:55,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1951595147, now seen corresponding path program 12 times [2021-04-14 23:55:55,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:55,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560627812] [2021-04-14 23:55:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:55,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560627812] [2021-04-14 23:55:55,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833189654] [2021-04-14 23:55:55,562 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 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 [2021-04-14 23:55:55,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-14 23:55:55,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:55:55,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-14 23:55:55,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:55,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:55,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-04-14 23:55:55,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930572218] [2021-04-14 23:55:55,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-14 23:55:55,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:55,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-14 23:55:55,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-04-14 23:55:55,732 INFO L87 Difference]: Start difference. First operand 1484 states and 4048 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:56,141 INFO L93 Difference]: Finished difference Result 2459 states and 6366 transitions. [2021-04-14 23:55:56,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-14 23:55:56,141 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 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 54 [2021-04-14 23:55:56,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:56,145 INFO L225 Difference]: With dead ends: 2459 [2021-04-14 23:55:56,145 INFO L226 Difference]: Without dead ends: 1932 [2021-04-14 23:55:56,146 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 312.0ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-04-14 23:55:56,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2021-04-14 23:55:56,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1234. [2021-04-14 23:55:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 2.669910786699108) internal successors, (3292), 1233 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:56,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3292 transitions. [2021-04-14 23:55:56,169 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3292 transitions. Word has length 54 [2021-04-14 23:55:56,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:56,170 INFO L480 AbstractCegarLoop]: Abstraction has 1234 states and 3292 transitions. [2021-04-14 23:55:56,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:56,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3292 transitions. [2021-04-14 23:55:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-04-14 23:55:56,173 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:56,173 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-04-14 23:55:56,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:55:56,394 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:56,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:56,395 INFO L82 PathProgramCache]: Analyzing trace with hash -626515090, now seen corresponding path program 13 times [2021-04-14 23:55:56,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:56,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716825100] [2021-04-14 23:55:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:56,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716825100] [2021-04-14 23:55:56,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386275670] [2021-04-14 23:55:56,502 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 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 [2021-04-14 23:55:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:56,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-14 23:55:56,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:56,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:56,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-04-14 23:55:56,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940812556] [2021-04-14 23:55:56,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-14 23:55:56,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:56,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-14 23:55:56,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-04-14 23:55:56,652 INFO L87 Difference]: Start difference. First operand 1234 states and 3292 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:56,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:56,841 INFO L93 Difference]: Finished difference Result 1927 states and 4856 transitions. [2021-04-14 23:55:56,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-14 23:55:56,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-04-14 23:55:56,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:56,845 INFO L225 Difference]: With dead ends: 1927 [2021-04-14 23:55:56,845 INFO L226 Difference]: Without dead ends: 1657 [2021-04-14 23:55:56,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-04-14 23:55:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-04-14 23:55:56,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1284. [2021-04-14 23:55:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 2.682774746687451) internal successors, (3442), 1283 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:56,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 3442 transitions. [2021-04-14 23:55:56,875 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 3442 transitions. Word has length 59 [2021-04-14 23:55:56,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:56,875 INFO L480 AbstractCegarLoop]: Abstraction has 1284 states and 3442 transitions. [2021-04-14 23:55:56,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:56,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 3442 transitions. [2021-04-14 23:55:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-04-14 23:55:56,877 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:56,877 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-04-14 23:55:57,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-14 23:55:57,097 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:57,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:57,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1902170644, now seen corresponding path program 14 times [2021-04-14 23:55:57,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:57,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590491047] [2021-04-14 23:55:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:57,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590491047] [2021-04-14 23:55:57,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923965913] [2021-04-14 23:55:57,183 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 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 [2021-04-14 23:55:57,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:55:57,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:55:57,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-14 23:55:57,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:57,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:57,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-04-14 23:55:57,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312067079] [2021-04-14 23:55:57,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-14 23:55:57,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:57,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-14 23:55:57,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-04-14 23:55:57,355 INFO L87 Difference]: Start difference. First operand 1284 states and 3442 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:57,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:57,576 INFO L93 Difference]: Finished difference Result 2132 states and 5381 transitions. [2021-04-14 23:55:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-14 23:55:57,576 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-04-14 23:55:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:57,580 INFO L225 Difference]: With dead ends: 2132 [2021-04-14 23:55:57,580 INFO L226 Difference]: Without dead ends: 1862 [2021-04-14 23:55:57,580 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2021-04-14 23:55:57,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-04-14 23:55:57,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1384. [2021-04-14 23:55:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 2.71294287780188) internal successors, (3752), 1383 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 3752 transitions. [2021-04-14 23:55:57,636 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 3752 transitions. Word has length 59 [2021-04-14 23:55:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:57,636 INFO L480 AbstractCegarLoop]: Abstraction has 1384 states and 3752 transitions. [2021-04-14 23:55:57,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:57,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 3752 transitions. [2021-04-14 23:55:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-04-14 23:55:57,638 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:57,638 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-04-14 23:55:57,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:55:57,853 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:57,853 INFO L82 PathProgramCache]: Analyzing trace with hash 46107658, now seen corresponding path program 15 times [2021-04-14 23:55:57,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:57,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603135688] [2021-04-14 23:55:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:57,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603135688] [2021-04-14 23:55:57,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174746275] [2021-04-14 23:55:57,949 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 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 [2021-04-14 23:55:58,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-14 23:55:58,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:55:58,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-14 23:55:58,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:58,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:58,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-04-14 23:55:58,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710439179] [2021-04-14 23:55:58,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-14 23:55:58,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:58,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-14 23:55:58,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-04-14 23:55:58,092 INFO L87 Difference]: Start difference. First operand 1384 states and 3752 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:58,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:58,379 INFO L93 Difference]: Finished difference Result 3141 states and 8262 transitions. [2021-04-14 23:55:58,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-14 23:55:58,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-04-14 23:55:58,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:58,386 INFO L225 Difference]: With dead ends: 3141 [2021-04-14 23:55:58,386 INFO L226 Difference]: Without dead ends: 2660 [2021-04-14 23:55:58,387 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2021-04-14 23:55:58,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-04-14 23:55:58,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 1559. [2021-04-14 23:55:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 2.7586649550706035) internal successors, (4298), 1558 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 4298 transitions. [2021-04-14 23:55:58,417 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 4298 transitions. Word has length 59 [2021-04-14 23:55:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:58,417 INFO L480 AbstractCegarLoop]: Abstraction has 1559 states and 4298 transitions. [2021-04-14 23:55:58,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 4298 transitions. [2021-04-14 23:55:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-04-14 23:55:58,420 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:58,420 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-04-14 23:55:58,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-14 23:55:58,633 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:58,633 INFO L82 PathProgramCache]: Analyzing trace with hash 705680398, now seen corresponding path program 16 times [2021-04-14 23:55:58,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:58,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482454155] [2021-04-14 23:55:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:58,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482454155] [2021-04-14 23:55:58,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134957791] [2021-04-14 23:55:58,715 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 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 [2021-04-14 23:55:58,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:55:58,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:55:58,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-14 23:55:58,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:58,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:58,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-14 23:55:58,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785964796] [2021-04-14 23:55:58,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-14 23:55:58,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:58,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-14 23:55:58,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-04-14 23:55:58,876 INFO L87 Difference]: Start difference. First operand 1559 states and 4298 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:59,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:55:59,197 INFO L93 Difference]: Finished difference Result 2198 states and 5816 transitions. [2021-04-14 23:55:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-14 23:55:59,197 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-04-14 23:55:59,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:55:59,201 INFO L225 Difference]: With dead ends: 2198 [2021-04-14 23:55:59,201 INFO L226 Difference]: Without dead ends: 1787 [2021-04-14 23:55:59,201 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-04-14 23:55:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-04-14 23:55:59,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1509. [2021-04-14 23:55:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 2.753315649867374) internal successors, (4152), 1508 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 4152 transitions. [2021-04-14 23:55:59,226 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 4152 transitions. Word has length 59 [2021-04-14 23:55:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:55:59,226 INFO L480 AbstractCegarLoop]: Abstraction has 1509 states and 4152 transitions. [2021-04-14 23:55:59,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:55:59,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 4152 transitions. [2021-04-14 23:55:59,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-04-14 23:55:59,229 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:55:59,229 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-04-14 23:55:59,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-04-14 23:55:59,450 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:55:59,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:55:59,450 INFO L82 PathProgramCache]: Analyzing trace with hash 142897558, now seen corresponding path program 17 times [2021-04-14 23:55:59,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:55:59,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610335993] [2021-04-14 23:55:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:55:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:55:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:59,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610335993] [2021-04-14 23:55:59,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932033648] [2021-04-14 23:55:59,595 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 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 [2021-04-14 23:55:59,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-14 23:55:59,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:55:59,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-14 23:55:59,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:55:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:55:59,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:55:59,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-04-14 23:55:59,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789203877] [2021-04-14 23:55:59,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-14 23:55:59,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:55:59,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-14 23:55:59,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-04-14 23:55:59,815 INFO L87 Difference]: Start difference. First operand 1509 states and 4152 transitions. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:00,071 INFO L93 Difference]: Finished difference Result 2349 states and 6152 transitions. [2021-04-14 23:56:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-14 23:56:00,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-04-14 23:56:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:00,076 INFO L225 Difference]: With dead ends: 2349 [2021-04-14 23:56:00,076 INFO L226 Difference]: Without dead ends: 2015 [2021-04-14 23:56:00,076 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 276.9ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-04-14 23:56:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-04-14 23:56:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1594. [2021-04-14 23:56:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.7131198995605774) internal successors, (4322), 1593 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4322 transitions. [2021-04-14 23:56:00,103 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4322 transitions. Word has length 64 [2021-04-14 23:56:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:00,103 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 4322 transitions. [2021-04-14 23:56:00,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4322 transitions. [2021-04-14 23:56:00,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-04-14 23:56:00,105 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:00,105 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-04-14 23:56:00,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-14 23:56:00,321 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:00,321 INFO L82 PathProgramCache]: Analyzing trace with hash -529487580, now seen corresponding path program 18 times [2021-04-14 23:56:00,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:00,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159169840] [2021-04-14 23:56:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:00,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159169840] [2021-04-14 23:56:00,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576804428] [2021-04-14 23:56:00,435 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 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 [2021-04-14 23:56:00,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-14 23:56:00,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:00,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-14 23:56:00,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:00,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:00,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-14 23:56:00,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721542778] [2021-04-14 23:56:00,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-14 23:56:00,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:00,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-14 23:56:00,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-04-14 23:56:00,622 INFO L87 Difference]: Start difference. First operand 1594 states and 4322 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:00,807 INFO L93 Difference]: Finished difference Result 2542 states and 6346 transitions. [2021-04-14 23:56:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-14 23:56:00,807 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 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 64 [2021-04-14 23:56:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:00,811 INFO L225 Difference]: With dead ends: 2542 [2021-04-14 23:56:00,812 INFO L226 Difference]: Without dead ends: 2272 [2021-04-14 23:56:00,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:56:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-04-14 23:56:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1609. [2021-04-14 23:56:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 2.7064676616915424) internal successors, (4352), 1608 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:00,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4352 transitions. [2021-04-14 23:56:00,838 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4352 transitions. Word has length 64 [2021-04-14 23:56:00,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:00,838 INFO L480 AbstractCegarLoop]: Abstraction has 1609 states and 4352 transitions. [2021-04-14 23:56:00,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4352 transitions. [2021-04-14 23:56:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-04-14 23:56:00,841 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:00,841 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-04-14 23:56:01,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:01,063 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:01,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:01,064 INFO L82 PathProgramCache]: Analyzing trace with hash -864209596, now seen corresponding path program 19 times [2021-04-14 23:56:01,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:01,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744856145] [2021-04-14 23:56:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:01,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744856145] [2021-04-14 23:56:01,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825942500] [2021-04-14 23:56:01,175 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 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 [2021-04-14 23:56:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:01,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-14 23:56:01,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:01,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:01,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-14 23:56:01,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19987038] [2021-04-14 23:56:01,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-14 23:56:01,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:01,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-14 23:56:01,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-04-14 23:56:01,390 INFO L87 Difference]: Start difference. First operand 1609 states and 4352 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:01,595 INFO L93 Difference]: Finished difference Result 2427 states and 6116 transitions. [2021-04-14 23:56:01,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-14 23:56:01,595 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 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 64 [2021-04-14 23:56:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:01,598 INFO L225 Difference]: With dead ends: 2427 [2021-04-14 23:56:01,598 INFO L226 Difference]: Without dead ends: 2157 [2021-04-14 23:56:01,598 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-04-14 23:56:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-04-14 23:56:01,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1609. [2021-04-14 23:56:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 2.7064676616915424) internal successors, (4352), 1608 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4352 transitions. [2021-04-14 23:56:01,623 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4352 transitions. Word has length 64 [2021-04-14 23:56:01,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:01,623 INFO L480 AbstractCegarLoop]: Abstraction has 1609 states and 4352 transitions. [2021-04-14 23:56:01,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4352 transitions. [2021-04-14 23:56:01,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-04-14 23:56:01,626 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:01,626 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-04-14 23:56:01,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:01,841 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:01,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2139865150, now seen corresponding path program 20 times [2021-04-14 23:56:01,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:01,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041562624] [2021-04-14 23:56:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:01,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041562624] [2021-04-14 23:56:01,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722518326] [2021-04-14 23:56:01,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:02,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:56:02,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:02,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-14 23:56:02,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:02,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:02,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-14 23:56:02,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322930016] [2021-04-14 23:56:02,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-14 23:56:02,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:02,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-14 23:56:02,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-04-14 23:56:02,125 INFO L87 Difference]: Start difference. First operand 1609 states and 4352 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:02,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:02,343 INFO L93 Difference]: Finished difference Result 2327 states and 5916 transitions. [2021-04-14 23:56:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-14 23:56:02,343 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 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 64 [2021-04-14 23:56:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:02,346 INFO L225 Difference]: With dead ends: 2327 [2021-04-14 23:56:02,346 INFO L226 Difference]: Without dead ends: 2057 [2021-04-14 23:56:02,346 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-04-14 23:56:02,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-04-14 23:56:02,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1609. [2021-04-14 23:56:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 2.7064676616915424) internal successors, (4352), 1608 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4352 transitions. [2021-04-14 23:56:02,371 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4352 transitions. Word has length 64 [2021-04-14 23:56:02,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:02,371 INFO L480 AbstractCegarLoop]: Abstraction has 1609 states and 4352 transitions. [2021-04-14 23:56:02,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:02,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4352 transitions. [2021-04-14 23:56:02,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-04-14 23:56:02,374 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:02,374 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-04-14 23:56:02,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:02,593 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:02,593 INFO L82 PathProgramCache]: Analyzing trace with hash -191586848, now seen corresponding path program 21 times [2021-04-14 23:56:02,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:02,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737269347] [2021-04-14 23:56:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:02,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737269347] [2021-04-14 23:56:02,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397325845] [2021-04-14 23:56:02,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:02,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-14 23:56:02,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:02,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-14 23:56:02,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:02,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:02,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-14 23:56:02,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239190076] [2021-04-14 23:56:02,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-14 23:56:02,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:02,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-14 23:56:02,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-04-14 23:56:02,903 INFO L87 Difference]: Start difference. First operand 1609 states and 4352 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:03,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:03,202 INFO L93 Difference]: Finished difference Result 3281 states and 8612 transitions. [2021-04-14 23:56:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-14 23:56:03,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 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 64 [2021-04-14 23:56:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:03,205 INFO L225 Difference]: With dead ends: 3281 [2021-04-14 23:56:03,205 INFO L226 Difference]: Without dead ends: 2800 [2021-04-14 23:56:03,206 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 249.7ms TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2021-04-14 23:56:03,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-04-14 23:56:03,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1674. [2021-04-14 23:56:03,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.748356246264196) internal successors, (4598), 1673 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:03,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 4598 transitions. [2021-04-14 23:56:03,235 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 4598 transitions. Word has length 64 [2021-04-14 23:56:03,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:03,235 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 4598 transitions. [2021-04-14 23:56:03,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:03,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 4598 transitions. [2021-04-14 23:56:03,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-04-14 23:56:03,238 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:03,238 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-04-14 23:56:03,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-04-14 23:56:03,445 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:03,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:03,445 INFO L82 PathProgramCache]: Analyzing trace with hash 467985892, now seen corresponding path program 22 times [2021-04-14 23:56:03,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:03,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151551599] [2021-04-14 23:56:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:03,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151551599] [2021-04-14 23:56:03,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775138070] [2021-04-14 23:56:03,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:03,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:56:03,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:03,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-14 23:56:03,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:03,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:03,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-14 23:56:03,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440520039] [2021-04-14 23:56:03,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-14 23:56:03,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:03,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-14 23:56:03,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-04-14 23:56:03,711 INFO L87 Difference]: Start difference. First operand 1674 states and 4598 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:04,070 INFO L93 Difference]: Finished difference Result 2363 states and 6216 transitions. [2021-04-14 23:56:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-14 23:56:04,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 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 64 [2021-04-14 23:56:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:04,073 INFO L225 Difference]: With dead ends: 2363 [2021-04-14 23:56:04,073 INFO L226 Difference]: Without dead ends: 1952 [2021-04-14 23:56:04,073 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-04-14 23:56:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2021-04-14 23:56:04,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1324. [2021-04-14 23:56:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 2.677248677248677) internal successors, (3542), 1323 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3542 transitions. [2021-04-14 23:56:04,095 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3542 transitions. Word has length 64 [2021-04-14 23:56:04,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:04,095 INFO L480 AbstractCegarLoop]: Abstraction has 1324 states and 3542 transitions. [2021-04-14 23:56:04,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:04,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3542 transitions. [2021-04-14 23:56:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-04-14 23:56:04,097 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:04,097 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-04-14 23:56:04,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:04,319 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:04,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1172122721, now seen corresponding path program 23 times [2021-04-14 23:56:04,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:04,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833944367] [2021-04-14 23:56:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:04,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833944367] [2021-04-14 23:56:04,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635519629] [2021-04-14 23:56:04,433 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 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 [2021-04-14 23:56:04,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-14 23:56:04,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:04,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-14 23:56:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:04,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:04,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-04-14 23:56:04,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073058843] [2021-04-14 23:56:04,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-14 23:56:04,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:04,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-14 23:56:04,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-04-14 23:56:04,595 INFO L87 Difference]: Start difference. First operand 1324 states and 3542 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:04,810 INFO L93 Difference]: Finished difference Result 2117 states and 5306 transitions. [2021-04-14 23:56:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-14 23:56:04,811 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-04-14 23:56:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:04,812 INFO L225 Difference]: With dead ends: 2117 [2021-04-14 23:56:04,812 INFO L226 Difference]: Without dead ends: 1847 [2021-04-14 23:56:04,813 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-04-14 23:56:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-04-14 23:56:04,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1374. [2021-04-14 23:56:04,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 2.689002184996358) internal successors, (3692), 1373 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 3692 transitions. [2021-04-14 23:56:04,832 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 3692 transitions. Word has length 69 [2021-04-14 23:56:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:04,832 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 3692 transitions. [2021-04-14 23:56:04,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 3692 transitions. [2021-04-14 23:56:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-04-14 23:56:04,834 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:04,834 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-04-14 23:56:05,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-14 23:56:05,049 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:05,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:05,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1558534301, now seen corresponding path program 24 times [2021-04-14 23:56:05,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:05,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738664130] [2021-04-14 23:56:05,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:05,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738664130] [2021-04-14 23:56:05,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993256783] [2021-04-14 23:56:05,159 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 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 [2021-04-14 23:56:05,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-14 23:56:05,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:05,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-14 23:56:05,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:05,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:05,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-04-14 23:56:05,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144737265] [2021-04-14 23:56:05,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-14 23:56:05,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:05,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-14 23:56:05,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-04-14 23:56:05,333 INFO L87 Difference]: Start difference. First operand 1374 states and 3692 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:05,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:05,565 INFO L93 Difference]: Finished difference Result 2342 states and 5856 transitions. [2021-04-14 23:56:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-14 23:56:05,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-04-14 23:56:05,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:05,567 INFO L225 Difference]: With dead ends: 2342 [2021-04-14 23:56:05,567 INFO L226 Difference]: Without dead ends: 2072 [2021-04-14 23:56:05,567 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 220.3ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-04-14 23:56:05,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-04-14 23:56:05,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1474. [2021-04-14 23:56:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.7101154107264085) internal successors, (3992), 1473 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:05,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 3992 transitions. [2021-04-14 23:56:05,590 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 3992 transitions. Word has length 69 [2021-04-14 23:56:05,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:05,590 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 3992 transitions. [2021-04-14 23:56:05,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:05,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 3992 transitions. [2021-04-14 23:56:05,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-04-14 23:56:05,592 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:05,593 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-04-14 23:56:05,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-04-14 23:56:05,806 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:05,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:05,806 INFO L82 PathProgramCache]: Analyzing trace with hash 282878747, now seen corresponding path program 25 times [2021-04-14 23:56:05,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:05,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060957191] [2021-04-14 23:56:05,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:05,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060957191] [2021-04-14 23:56:05,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692877823] [2021-04-14 23:56:05,903 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:05,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-14 23:56:05,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:06,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:06,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-04-14 23:56:06,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211240350] [2021-04-14 23:56:06,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-14 23:56:06,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:06,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-14 23:56:06,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-04-14 23:56:06,059 INFO L87 Difference]: Start difference. First operand 1474 states and 3992 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:06,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:06,345 INFO L93 Difference]: Finished difference Result 2342 states and 5956 transitions. [2021-04-14 23:56:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-14 23:56:06,345 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-04-14 23:56:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:06,348 INFO L225 Difference]: With dead ends: 2342 [2021-04-14 23:56:06,348 INFO L226 Difference]: Without dead ends: 2072 [2021-04-14 23:56:06,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-04-14 23:56:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-04-14 23:56:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1574. [2021-04-14 23:56:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 2.7285441830896375) internal successors, (4292), 1573 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:06,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 4292 transitions. [2021-04-14 23:56:06,373 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 4292 transitions. Word has length 69 [2021-04-14 23:56:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:06,374 INFO L480 AbstractCegarLoop]: Abstraction has 1574 states and 4292 transitions. [2021-04-14 23:56:06,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 4292 transitions. [2021-04-14 23:56:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-04-14 23:56:06,376 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:06,376 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-04-14 23:56:06,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-14 23:56:06,599 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:06,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:06,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2063810247, now seen corresponding path program 26 times [2021-04-14 23:56:06,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:06,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192543050] [2021-04-14 23:56:06,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:06,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192543050] [2021-04-14 23:56:06,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243739959] [2021-04-14 23:56:06,730 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:06,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:56:06,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:06,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-14 23:56:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:06,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:06,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-04-14 23:56:06,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56804721] [2021-04-14 23:56:06,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-14 23:56:06,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:06,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-14 23:56:06,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-04-14 23:56:06,868 INFO L87 Difference]: Start difference. First operand 1574 states and 4292 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:07,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:07,155 INFO L93 Difference]: Finished difference Result 3065 states and 8058 transitions. [2021-04-14 23:56:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-14 23:56:07,156 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-04-14 23:56:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:07,158 INFO L225 Difference]: With dead ends: 3065 [2021-04-14 23:56:07,158 INFO L226 Difference]: Without dead ends: 2795 [2021-04-14 23:56:07,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-04-14 23:56:07,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-04-14 23:56:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 1749. [2021-04-14 23:56:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 2.7734553775743707) internal successors, (4848), 1748 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 4848 transitions. [2021-04-14 23:56:07,182 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 4848 transitions. Word has length 69 [2021-04-14 23:56:07,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:07,182 INFO L480 AbstractCegarLoop]: Abstraction has 1749 states and 4848 transitions. [2021-04-14 23:56:07,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 4848 transitions. [2021-04-14 23:56:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-04-14 23:56:07,184 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:07,184 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-04-14 23:56:07,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-14 23:56:07,405 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:07,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:07,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1404237507, now seen corresponding path program 27 times [2021-04-14 23:56:07,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:07,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722504914] [2021-04-14 23:56:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:07,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722504914] [2021-04-14 23:56:07,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525142816] [2021-04-14 23:56:07,506 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:07,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-14 23:56:07,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:07,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-14 23:56:07,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:07,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:07,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-14 23:56:07,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400281964] [2021-04-14 23:56:07,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-14 23:56:07,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:07,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-14 23:56:07,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-04-14 23:56:07,648 INFO L87 Difference]: Start difference. First operand 1749 states and 4848 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:08,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:08,089 INFO L93 Difference]: Finished difference Result 2438 states and 6466 transitions. [2021-04-14 23:56:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-14 23:56:08,090 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 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 69 [2021-04-14 23:56:08,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:08,092 INFO L225 Difference]: With dead ends: 2438 [2021-04-14 23:56:08,092 INFO L226 Difference]: Without dead ends: 2027 [2021-04-14 23:56:08,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2021-04-14 23:56:08,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-04-14 23:56:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1263. [2021-04-14 23:56:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 2.6814580031695723) internal successors, (3384), 1262 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 3384 transitions. [2021-04-14 23:56:08,110 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 3384 transitions. Word has length 69 [2021-04-14 23:56:08,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:08,111 INFO L480 AbstractCegarLoop]: Abstraction has 1263 states and 3384 transitions. [2021-04-14 23:56:08,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:08,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 3384 transitions. [2021-04-14 23:56:08,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-04-14 23:56:08,112 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:08,112 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:08,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-14 23:56:08,329 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash 925994951, now seen corresponding path program 28 times [2021-04-14 23:56:08,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:08,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450419441] [2021-04-14 23:56:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-14 23:56:08,339 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-14 23:56:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-14 23:56:08,369 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-14 23:56:08,394 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-04-14 23:56:08,394 INFO L652 BasicCegarLoop]: Counterexample might be feasible [2021-04-14 23:56:08,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-04-14 23:56:08,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.04 11:56:08 BasicIcfg [2021-04-14 23:56:08,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-14 23:56:08,491 INFO L168 Benchmark]: Toolchain (without parser) took 26330.09 ms. Allocated memory was 335.5 MB in the beginning and 604.0 MB in the end (delta: 268.4 MB). Free memory was 298.6 MB in the beginning and 580.2 MB in the end (delta: -281.5 MB). Peak memory consumption was 341.2 MB. Max. memory is 16.0 GB. [2021-04-14 23:56:08,491 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 335.5 MB. Free memory was 316.7 MB in the beginning and 316.7 MB in the end (delta: 69.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-14 23:56:08,491 INFO L168 Benchmark]: CACSL2BoogieTranslator took 482.04 ms. Allocated memory is still 335.5 MB. Free memory was 298.4 MB in the beginning and 298.7 MB in the end (delta: -290.8 kB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. [2021-04-14 23:56:08,491 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.24 ms. Allocated memory is still 335.5 MB. Free memory was 298.7 MB in the beginning and 297.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-14 23:56:08,491 INFO L168 Benchmark]: Boogie Preprocessor took 26.22 ms. Allocated memory is still 335.5 MB. Free memory was 296.6 MB in the beginning and 295.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-14 23:56:08,491 INFO L168 Benchmark]: RCFGBuilder took 471.01 ms. Allocated memory is still 335.5 MB. Free memory was 295.6 MB in the beginning and 273.5 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-04-14 23:56:08,491 INFO L168 Benchmark]: TraceAbstraction took 25295.15 ms. Allocated memory was 335.5 MB in the beginning and 604.0 MB in the end (delta: 268.4 MB). Free memory was 273.5 MB in the beginning and 580.2 MB in the end (delta: -306.6 MB). Peak memory consumption was 315.2 MB. Max. memory is 16.0 GB. [2021-04-14 23:56:08,491 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 335.5 MB. Free memory was 316.7 MB in the beginning and 316.7 MB in the end (delta: 69.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 482.04 ms. Allocated memory is still 335.5 MB. Free memory was 298.4 MB in the beginning and 298.7 MB in the end (delta: -290.8 kB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 48.24 ms. Allocated memory is still 335.5 MB. Free memory was 298.7 MB in the beginning and 297.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 26.22 ms. Allocated memory is still 335.5 MB. Free memory was 296.6 MB in the beginning and 295.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 471.01 ms. Allocated memory is still 335.5 MB. Free memory was 295.6 MB in the beginning and 273.5 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 25295.15 ms. Allocated memory was 335.5 MB in the beginning and 604.0 MB in the end (delta: 268.4 MB). Free memory was 273.5 MB in the beginning and 580.2 MB in the end (delta: -306.6 MB). Peak memory consumption was 315.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [i=3, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L716] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L719] 0 int condJ = j >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L721] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 25097.5ms, OverallIterations: 37, TraceHistogramMax: 5, EmptinessCheckTime: 89.2ms, AutomataDifference: 8077.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 79.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3027 SDtfs, 11482 SDslu, 18237 SDs, 0 SdLazy, 3471 SolverSat, 1211 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2057.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2441 GetRequests, 1668 SyntacticMatches, 0 SemanticMatches, 773 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3855 ImplicationChecksByTransitivity, 6805.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1749occurred in iteration=35, InterpolantAutomatonStates: 665, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1060.3ms AutomataMinimizationTime, 36 MinimizatonAttempts, 18447 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 377.7ms SsaConstructionTime, 912.3ms SatisfiabilityAnalysisTime, 6721.1ms InterpolantComputationTime, 3598 NumberOfCodeBlocks, 3598 NumberOfCodeBlocksAsserted, 117 NumberOfCheckSat, 3459 ConstructedInterpolants, 0 QuantifiedInterpolants, 13005 SizeOfPredicates, 223 NumberOfNonLiveVariables, 4022 ConjunctsInSsa, 374 ConjunctsInUnsatCore, 65 InterpolantComputations, 7 PerfectInterpolantSequences, 8/1662 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...