/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 17:52:53,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 17:52:53,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 17:52:53,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 17:52:53,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 17:52:53,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 17:52:53,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 17:52:53,911 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 [2021-06-05 17:52:53,929 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 17:52:53,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 17:52:53,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 17:52:53,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 17:52:53,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 17:52:53,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 17:52:53,931 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 17:52:53,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 17:52:53,931 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 17:52:53,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 17:52:53,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 17:52:53,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 17:52:53,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 17:52:53,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 17:52:53,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 17:52:53,932 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 17:52:53,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 17:52:53,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 17:52:53,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 17:52:53,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 17:52:53,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 17:52:53,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 17:52:53,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 17:52:53,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 17:52:53,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 17:52:53,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 17:52:53,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 17:52:53,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 17:52:53,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 17:52:53,934 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 17:52:53,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 17:52:53,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 17:52:54,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 17:52:54,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 17:52:54,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 17:52:54,215 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 17:52:54,216 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 17:52:54,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2021-06-05 17:52:54,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a59e0a3/e1c6a150606f4630a0fc5fd4f213f429/FLAG3e42d3bfa [2021-06-05 17:52:54,728 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 17:52:54,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2021-06-05 17:52:54,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a59e0a3/e1c6a150606f4630a0fc5fd4f213f429/FLAG3e42d3bfa [2021-06-05 17:52:55,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a59e0a3/e1c6a150606f4630a0fc5fd4f213f429 [2021-06-05 17:52:55,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 17:52:55,048 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 17:52:55,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 17:52:55,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 17:52:55,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 17:52:55,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f53cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55, skipping insertion in model container [2021-06-05 17:52:55,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 17:52:55,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 17:52:55,405 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i[30922,30935] [2021-06-05 17:52:55,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 17:52:55,415 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 17:52:55,457 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i[30922,30935] [2021-06-05 17:52:55,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 17:52:55,527 INFO L208 MainTranslator]: Completed translation [2021-06-05 17:52:55,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55 WrapperNode [2021-06-05 17:52:55,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 17:52:55,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 17:52:55,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 17:52:55,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 17:52:55,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 17:52:55,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 17:52:55,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 17:52:55,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 17:52:55,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 17:52:55,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 17:52:55,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 17:52:55,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 17:52:55,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (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 [2021-06-05 17:52:55,702 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 17:52:55,702 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 17:52:55,703 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 17:52:55,703 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 17:52:55,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 17:52:55,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-05 17:52:55,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 17:52:55,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 17:52:55,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 17:52:55,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-05 17:52:55,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 17:52:55,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 17:52:55,707 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 17:52:55,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 17:52:55,997 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 17:52:55,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:52:55 BoogieIcfgContainer [2021-06-05 17:52:55,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 17:52:56,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 17:52:56,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 17:52:56,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 17:52:56,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 05:52:55" (1/3) ... [2021-06-05 17:52:56,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c9b322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:52:56, skipping insertion in model container [2021-06-05 17:52:56,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (2/3) ... [2021-06-05 17:52:56,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c9b322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:52:56, skipping insertion in model container [2021-06-05 17:52:56,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:52:55" (3/3) ... [2021-06-05 17:52:56,005 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2021-06-05 17:52:56,010 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 17:52:56,010 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 17:52:56,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 17:52:56,011 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 17:52:56,034 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,034 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,034 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,034 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,035 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,035 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,035 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,035 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,035 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,036 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,036 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,036 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,036 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,037 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,037 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,037 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,037 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,037 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,038 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,038 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,038 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,038 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,038 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,039 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,039 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,039 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,039 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,039 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,040 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,040 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,040 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,040 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,041 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,041 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,041 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,041 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,041 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,042 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,042 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,042 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,042 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,042 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,043 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,043 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,043 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,043 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,043 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,044 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,044 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,044 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,044 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,044 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,045 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,045 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,045 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,045 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,045 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,046 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,046 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,046 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,048 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,048 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,048 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,048 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,053 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,053 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,054 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,056 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 17:52:56,075 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 17:52:56,091 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 17:52:56,092 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 17:52:56,092 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 17:52:56,092 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 17:52:56,092 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 17:52:56,092 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 17:52:56,092 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 17:52:56,092 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 17:52:56,105 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-06-05 17:52:56,215 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:56,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 17:52:56,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:56,242 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:56,242 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:56,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:56,246 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-06-05 17:52:56,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:56,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561766921] [2021-06-05 17:52:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:56,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:56,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561766921] [2021-06-05 17:52:56,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561766921] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:56,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:56,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 17:52:56,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415354454] [2021-06-05 17:52:56,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:52:56,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:56,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:52:56,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:52:56,609 INFO L87 Difference]: Start difference. First operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:56,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:56,824 INFO L93 Difference]: Finished difference Result 3996 states and 11572 transitions. [2021-06-05 17:52:56,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:52:56,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 17:52:56,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:56,857 INFO L225 Difference]: With dead ends: 3996 [2021-06-05 17:52:56,857 INFO L226 Difference]: Without dead ends: 1425 [2021-06-05 17:52:56,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:52:56,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-05 17:52:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-06-05 17:52:56,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.7184986595174263) internal successors, (3042), 1119 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-06-05 17:52:57,002 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-06-05 17:52:57,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:57,003 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-06-05 17:52:57,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-06-05 17:52:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 17:52:57,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:57,012 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:57,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 17:52:57,012 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:57,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:57,015 INFO L82 PathProgramCache]: Analyzing trace with hash 352608555, now seen corresponding path program 1 times [2021-06-05 17:52:57,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:57,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517533912] [2021-06-05 17:52:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:57,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:57,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517533912] [2021-06-05 17:52:57,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517533912] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:57,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:57,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 17:52:57,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677766579] [2021-06-05 17:52:57,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:52:57,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:57,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:52:57,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:52:57,229 INFO L87 Difference]: Start difference. First operand 1120 states and 3042 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:57,351 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-06-05 17:52:57,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:52:57,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 17:52:57,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:57,364 INFO L225 Difference]: With dead ends: 2025 [2021-06-05 17:52:57,364 INFO L226 Difference]: Without dead ends: 1758 [2021-06-05 17:52:57,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:52:57,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-05 17:52:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-06-05 17:52:57,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.7328605200945626) internal successors, (3468), 1269 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-06-05 17:52:57,410 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-06-05 17:52:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:57,412 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-06-05 17:52:57,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-06-05 17:52:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 17:52:57,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:57,414 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:57,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 17:52:57,415 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:57,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:57,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-06-05 17:52:57,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:57,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406347822] [2021-06-05 17:52:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:57,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:57,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406347822] [2021-06-05 17:52:57,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406347822] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:57,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:57,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 17:52:57,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105326714] [2021-06-05 17:52:57,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:52:57,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:57,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:52:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:52:57,555 INFO L87 Difference]: Start difference. First operand 1270 states and 3468 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:57,677 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-06-05 17:52:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:52:57,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 17:52:57,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:57,686 INFO L225 Difference]: With dead ends: 2062 [2021-06-05 17:52:57,686 INFO L226 Difference]: Without dead ends: 1758 [2021-06-05 17:52:57,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:52:57,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-05 17:52:57,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-06-05 17:52:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.683381088825215) internal successors, (3746), 1396 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-06-05 17:52:57,726 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-06-05 17:52:57,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:57,727 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-06-05 17:52:57,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-06-05 17:52:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 17:52:57,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:57,730 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:57,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 17:52:57,731 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:57,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:57,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-06-05 17:52:57,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:57,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080803024] [2021-06-05 17:52:57,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:57,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:57,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080803024] [2021-06-05 17:52:57,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080803024] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:57,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:57,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 17:52:57,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026925749] [2021-06-05 17:52:57,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:52:57,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:57,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:52:57,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:52:57,846 INFO L87 Difference]: Start difference. First operand 1397 states and 3746 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:57,955 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-06-05 17:52:57,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:52:57,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 17:52:57,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:57,969 INFO L225 Difference]: With dead ends: 2318 [2021-06-05 17:52:57,969 INFO L226 Difference]: Without dead ends: 1987 [2021-06-05 17:52:57,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:52:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-06-05 17:52:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-06-05 17:52:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 2.701916721744878) internal successors, (4088), 1513 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-06-05 17:52:58,011 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-06-05 17:52:58,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:58,013 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-06-05 17:52:58,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-06-05 17:52:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:52:58,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:58,016 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:58,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 17:52:58,016 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:58,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:58,016 INFO L82 PathProgramCache]: Analyzing trace with hash 476803984, now seen corresponding path program 1 times [2021-06-05 17:52:58,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:58,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723270035] [2021-06-05 17:52:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:58,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:58,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723270035] [2021-06-05 17:52:58,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723270035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:52:58,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612306670] [2021-06-05 17:52:58,140 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 [2021-06-05 17:52:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:58,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:52:58,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:52:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:58,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612306670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:52:58,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:52:58,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:52:58,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016465910] [2021-06-05 17:52:58,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:52:58,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:58,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:52:58,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:52:58,526 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:58,768 INFO L93 Difference]: Finished difference Result 2931 states and 7780 transitions. [2021-06-05 17:52:58,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:52:58,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:52:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:58,805 INFO L225 Difference]: With dead ends: 2931 [2021-06-05 17:52:58,806 INFO L226 Difference]: Without dead ends: 2549 [2021-06-05 17:52:58,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:52:58,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-06-05 17:52:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1814. [2021-06-05 17:52:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 2.724765581908439) internal successors, (4940), 1813 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 4940 transitions. [2021-06-05 17:52:58,864 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 4940 transitions. Word has length 42 [2021-06-05 17:52:58,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:58,864 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 4940 transitions. [2021-06-05 17:52:58,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 4940 transitions. [2021-06-05 17:52:58,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:52:58,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:58,867 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:59,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:52:59,089 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:59,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:59,089 INFO L82 PathProgramCache]: Analyzing trace with hash -504897849, now seen corresponding path program 1 times [2021-06-05 17:52:59,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:59,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562978253] [2021-06-05 17:52:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:59,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:59,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562978253] [2021-06-05 17:52:59,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562978253] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:59,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:59,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:52:59,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256502611] [2021-06-05 17:52:59,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:52:59,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:59,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:52:59,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:52:59,195 INFO L87 Difference]: Start difference. First operand 1814 states and 4940 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:59,297 INFO L93 Difference]: Finished difference Result 2566 states and 6814 transitions. [2021-06-05 17:52:59,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:52:59,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:52:59,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:59,308 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 17:52:59,308 INFO L226 Difference]: Without dead ends: 2414 [2021-06-05 17:52:59,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:52:59,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-06-05 17:52:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1902. [2021-06-05 17:52:59,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.7064702788006314) internal successors, (5145), 1901 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5145 transitions. [2021-06-05 17:52:59,357 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5145 transitions. Word has length 42 [2021-06-05 17:52:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:59,358 INFO L482 AbstractCegarLoop]: Abstraction has 1902 states and 5145 transitions. [2021-06-05 17:52:59,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5145 transitions. [2021-06-05 17:52:59,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:52:59,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:59,361 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:59,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 17:52:59,361 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:59,362 INFO L82 PathProgramCache]: Analyzing trace with hash -704490053, now seen corresponding path program 2 times [2021-06-05 17:52:59,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:59,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733822837] [2021-06-05 17:52:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:59,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:59,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733822837] [2021-06-05 17:52:59,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733822837] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:59,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:59,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:52:59,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125379219] [2021-06-05 17:52:59,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:52:59,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:59,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:52:59,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:52:59,476 INFO L87 Difference]: Start difference. First operand 1902 states and 5145 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:59,618 INFO L93 Difference]: Finished difference Result 2949 states and 7860 transitions. [2021-06-05 17:52:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:52:59,618 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:52:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:59,631 INFO L225 Difference]: With dead ends: 2949 [2021-06-05 17:52:59,631 INFO L226 Difference]: Without dead ends: 2682 [2021-06-05 17:52:59,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:52:59,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-06-05 17:52:59,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1884. [2021-06-05 17:52:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 2.729155602761551) internal successors, (5139), 1883 states have internal predecessors, (5139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 5139 transitions. [2021-06-05 17:52:59,680 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 5139 transitions. Word has length 42 [2021-06-05 17:52:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:59,681 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 5139 transitions. [2021-06-05 17:52:59,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 5139 transitions. [2021-06-05 17:52:59,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:52:59,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:59,684 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:59,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 17:52:59,684 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:59,684 INFO L82 PathProgramCache]: Analyzing trace with hash -109178658, now seen corresponding path program 1 times [2021-06-05 17:52:59,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:59,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038700980] [2021-06-05 17:52:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:59,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:59,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038700980] [2021-06-05 17:52:59,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038700980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:52:59,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504283530] [2021-06-05 17:52:59,774 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 [2021-06-05 17:52:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:59,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:52:59,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:00,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504283530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:00,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:00,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:53:00,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795841069] [2021-06-05 17:53:00,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:53:00,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:00,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:53:00,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:53:00,024 INFO L87 Difference]: Start difference. First operand 1884 states and 5139 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:00,183 INFO L93 Difference]: Finished difference Result 3126 states and 8198 transitions. [2021-06-05 17:53:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:53:00,184 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:53:00,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:00,208 INFO L225 Difference]: With dead ends: 3126 [2021-06-05 17:53:00,209 INFO L226 Difference]: Without dead ends: 2646 [2021-06-05 17:53:00,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:53:00,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-06-05 17:53:00,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2032. [2021-06-05 17:53:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 2.6853766617429837) internal successors, (5454), 2031 states have internal predecessors, (5454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 5454 transitions. [2021-06-05 17:53:00,268 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 5454 transitions. Word has length 42 [2021-06-05 17:53:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:00,271 INFO L482 AbstractCegarLoop]: Abstraction has 2032 states and 5454 transitions. [2021-06-05 17:53:00,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 5454 transitions. [2021-06-05 17:53:00,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:53:00,276 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:00,276 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:00,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:00,492 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:00,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:00,492 INFO L82 PathProgramCache]: Analyzing trace with hash 239343274, now seen corresponding path program 2 times [2021-06-05 17:53:00,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:00,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151358173] [2021-06-05 17:53:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:00,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:00,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151358173] [2021-06-05 17:53:00,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151358173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:00,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249672168] [2021-06-05 17:53:00,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:00,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:00,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:00,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:53:00,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:00,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249672168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:00,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:00,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:53:00,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854563162] [2021-06-05 17:53:00,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:53:00,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:00,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:53:00,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:53:00,783 INFO L87 Difference]: Start difference. First operand 2032 states and 5454 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:00,940 INFO L93 Difference]: Finished difference Result 3246 states and 8438 transitions. [2021-06-05 17:53:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:53:00,940 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:53:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:00,946 INFO L225 Difference]: With dead ends: 3246 [2021-06-05 17:53:00,947 INFO L226 Difference]: Without dead ends: 2766 [2021-06-05 17:53:00,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:53:00,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-06-05 17:53:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2089. [2021-06-05 17:53:00,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 2.692528735632184) internal successors, (5622), 2088 states have internal predecessors, (5622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 5622 transitions. [2021-06-05 17:53:00,994 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 5622 transitions. Word has length 42 [2021-06-05 17:53:00,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:00,994 INFO L482 AbstractCegarLoop]: Abstraction has 2089 states and 5622 transitions. [2021-06-05 17:53:00,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 5622 transitions. [2021-06-05 17:53:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:53:00,997 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:00,997 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:01,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 17:53:01,221 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:01,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:01,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1660775728, now seen corresponding path program 3 times [2021-06-05 17:53:01,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:01,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48101517] [2021-06-05 17:53:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:01,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:01,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48101517] [2021-06-05 17:53:01,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48101517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:01,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946028430] [2021-06-05 17:53:01,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:01,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:53:01,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:01,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:53:01,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:01,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946028430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:01,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:01,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:53:01,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133495298] [2021-06-05 17:53:01,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:53:01,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:01,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:53:01,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:53:01,529 INFO L87 Difference]: Start difference. First operand 2089 states and 5622 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:01,786 INFO L93 Difference]: Finished difference Result 3590 states and 9510 transitions. [2021-06-05 17:53:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:53:01,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:53:01,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:01,792 INFO L225 Difference]: With dead ends: 3590 [2021-06-05 17:53:01,792 INFO L226 Difference]: Without dead ends: 3056 [2021-06-05 17:53:01,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:53:01,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-06-05 17:53:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2263. [2021-06-05 17:53:01,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.7214854111405837) internal successors, (6156), 2262 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6156 transitions. [2021-06-05 17:53:01,841 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6156 transitions. Word has length 42 [2021-06-05 17:53:01,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:01,841 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6156 transitions. [2021-06-05 17:53:01,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6156 transitions. [2021-06-05 17:53:01,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:01,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:01,844 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:02,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:02,068 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:02,068 INFO L82 PathProgramCache]: Analyzing trace with hash -965377150, now seen corresponding path program 1 times [2021-06-05 17:53:02,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:02,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558496666] [2021-06-05 17:53:02,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:02,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:02,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558496666] [2021-06-05 17:53:02,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558496666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:02,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474973016] [2021-06-05 17:53:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:02,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:02,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:02,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474973016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:02,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:02,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:02,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317870085] [2021-06-05 17:53:02,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:02,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:02,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:02,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:02,414 INFO L87 Difference]: Start difference. First operand 2263 states and 6156 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:02,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:02,556 INFO L93 Difference]: Finished difference Result 3186 states and 8435 transitions. [2021-06-05 17:53:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:53:02,556 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:02,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:02,562 INFO L225 Difference]: With dead ends: 3186 [2021-06-05 17:53:02,562 INFO L226 Difference]: Without dead ends: 3034 [2021-06-05 17:53:02,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 159.6ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:53:02,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-06-05 17:53:02,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 2351. [2021-06-05 17:53:02,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 2.706808510638298) internal successors, (6361), 2350 states have internal predecessors, (6361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:02,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 6361 transitions. [2021-06-05 17:53:02,612 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 6361 transitions. Word has length 47 [2021-06-05 17:53:02,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:02,613 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 6361 transitions. [2021-06-05 17:53:02,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:02,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 6361 transitions. [2021-06-05 17:53:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:02,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:02,616 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:02,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 17:53:02,840 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:02,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:02,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1164969354, now seen corresponding path program 2 times [2021-06-05 17:53:02,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:02,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157486080] [2021-06-05 17:53:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:02,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:02,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157486080] [2021-06-05 17:53:02,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157486080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:02,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704726811] [2021-06-05 17:53:02,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:02,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:02,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:02,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:02,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:03,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704726811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:03,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:03,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:53:03,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675055845] [2021-06-05 17:53:03,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:53:03,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:03,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:53:03,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:53:03,143 INFO L87 Difference]: Start difference. First operand 2351 states and 6361 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:03,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:03,510 INFO L93 Difference]: Finished difference Result 4460 states and 11788 transitions. [2021-06-05 17:53:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:53:03,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:03,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:03,519 INFO L225 Difference]: With dead ends: 4460 [2021-06-05 17:53:03,520 INFO L226 Difference]: Without dead ends: 3902 [2021-06-05 17:53:03,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:53:03,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2021-06-05 17:53:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 2378. [2021-06-05 17:53:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7328565418594866) internal successors, (6496), 2377 states have internal predecessors, (6496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6496 transitions. [2021-06-05 17:53:03,579 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6496 transitions. Word has length 47 [2021-06-05 17:53:03,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:03,580 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6496 transitions. [2021-06-05 17:53:03,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:03,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6496 transitions. [2021-06-05 17:53:03,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:03,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:03,584 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:03,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:03,805 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:03,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1283832340, now seen corresponding path program 1 times [2021-06-05 17:53:03,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:03,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875734060] [2021-06-05 17:53:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:03,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:03,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875734060] [2021-06-05 17:53:03,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875734060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:03,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307772099] [2021-06-05 17:53:03,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:03,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:03,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:04,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307772099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:04,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:04,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:04,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5797331] [2021-06-05 17:53:04,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:04,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:04,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:04,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:04,122 INFO L87 Difference]: Start difference. First operand 2378 states and 6496 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:04,301 INFO L93 Difference]: Finished difference Result 3748 states and 9803 transitions. [2021-06-05 17:53:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:53:04,302 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:04,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:04,309 INFO L225 Difference]: With dead ends: 3748 [2021-06-05 17:53:04,309 INFO L226 Difference]: Without dead ends: 3356 [2021-06-05 17:53:04,310 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:53:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-06-05 17:53:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2418. [2021-06-05 17:53:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.7207281754240795) internal successors, (6576), 2417 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 6576 transitions. [2021-06-05 17:53:04,400 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 6576 transitions. Word has length 47 [2021-06-05 17:53:04,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:04,401 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 6576 transitions. [2021-06-05 17:53:04,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 6576 transitions. [2021-06-05 17:53:04,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:04,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:04,405 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:04,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:04,625 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:04,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:04,625 INFO L82 PathProgramCache]: Analyzing trace with hash -796889656, now seen corresponding path program 2 times [2021-06-05 17:53:04,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:04,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381163046] [2021-06-05 17:53:04,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:04,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:04,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381163046] [2021-06-05 17:53:04,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381163046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:04,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300334749] [2021-06-05 17:53:04,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:04,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:04,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:04,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:04,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:04,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300334749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:04,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:04,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:04,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915524878] [2021-06-05 17:53:04,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:04,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:04,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:04,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:04,921 INFO L87 Difference]: Start difference. First operand 2418 states and 6576 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:05,115 INFO L93 Difference]: Finished difference Result 3948 states and 10203 transitions. [2021-06-05 17:53:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:53:05,116 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:05,122 INFO L225 Difference]: With dead ends: 3948 [2021-06-05 17:53:05,122 INFO L226 Difference]: Without dead ends: 3556 [2021-06-05 17:53:05,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:53:05,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2021-06-05 17:53:05,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 2436. [2021-06-05 17:53:05,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 2.720328542094456) internal successors, (6624), 2435 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 6624 transitions. [2021-06-05 17:53:05,166 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 6624 transitions. Word has length 47 [2021-06-05 17:53:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:05,166 INFO L482 AbstractCegarLoop]: Abstraction has 2436 states and 6624 transitions. [2021-06-05 17:53:05,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:05,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 6624 transitions. [2021-06-05 17:53:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:05,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:05,170 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:05,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 17:53:05,393 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:05,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:05,393 INFO L82 PathProgramCache]: Analyzing trace with hash 519106886, now seen corresponding path program 3 times [2021-06-05 17:53:05,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:05,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151658159] [2021-06-05 17:53:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:05,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:05,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151658159] [2021-06-05 17:53:05,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151658159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:05,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409263330] [2021-06-05 17:53:05,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:05,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:53:05,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:05,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:05,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:05,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409263330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:05,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:05,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:05,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241494644] [2021-06-05 17:53:05,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:05,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:05,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:05,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:05,704 INFO L87 Difference]: Start difference. First operand 2436 states and 6624 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:05,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:05,943 INFO L93 Difference]: Finished difference Result 4116 states and 10723 transitions. [2021-06-05 17:53:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:53:05,943 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:05,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:05,951 INFO L225 Difference]: With dead ends: 4116 [2021-06-05 17:53:05,951 INFO L226 Difference]: Without dead ends: 3724 [2021-06-05 17:53:05,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:53:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3724 states. [2021-06-05 17:53:06,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3724 to 2601. [2021-06-05 17:53:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2601 states, 2600 states have (on average 2.7380769230769233) internal successors, (7119), 2600 states have internal predecessors, (7119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:06,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 7119 transitions. [2021-06-05 17:53:06,036 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 7119 transitions. Word has length 47 [2021-06-05 17:53:06,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:06,036 INFO L482 AbstractCegarLoop]: Abstraction has 2601 states and 7119 transitions. [2021-06-05 17:53:06,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:06,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 7119 transitions. [2021-06-05 17:53:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:06,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:06,040 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:06,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:06,262 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:06,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:06,263 INFO L82 PathProgramCache]: Analyzing trace with hash 458639374, now seen corresponding path program 4 times [2021-06-05 17:53:06,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:06,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401101548] [2021-06-05 17:53:06,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:06,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:06,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401101548] [2021-06-05 17:53:06,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401101548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:06,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135749003] [2021-06-05 17:53:06,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:06,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:53:06,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:06,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:06,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:06,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135749003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:06,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:06,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:06,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776135093] [2021-06-05 17:53:06,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:06,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:06,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:06,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:06,547 INFO L87 Difference]: Start difference. First operand 2601 states and 7119 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:07,040 INFO L93 Difference]: Finished difference Result 5603 states and 14844 transitions. [2021-06-05 17:53:07,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:53:07,040 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:07,049 INFO L225 Difference]: With dead ends: 5603 [2021-06-05 17:53:07,049 INFO L226 Difference]: Without dead ends: 4778 [2021-06-05 17:53:07,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 414.5ms TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 17:53:07,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4778 states. [2021-06-05 17:53:07,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4778 to 2749. [2021-06-05 17:53:07,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2748 states have (on average 2.727802037845706) internal successors, (7496), 2748 states have internal predecessors, (7496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:07,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 7496 transitions. [2021-06-05 17:53:07,110 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 7496 transitions. Word has length 47 [2021-06-05 17:53:07,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:07,111 INFO L482 AbstractCegarLoop]: Abstraction has 2749 states and 7496 transitions. [2021-06-05 17:53:07,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 7496 transitions. [2021-06-05 17:53:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:07,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:07,116 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:07,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:07,337 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash 107753584, now seen corresponding path program 2 times [2021-06-05 17:53:07,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:07,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170164772] [2021-06-05 17:53:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:07,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:07,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170164772] [2021-06-05 17:53:07,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170164772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:07,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620116727] [2021-06-05 17:53:07,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:07,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:07,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:07,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:07,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:07,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620116727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:07,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:07,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:53:07,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167957870] [2021-06-05 17:53:07,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:53:07,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:53:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:07,719 INFO L87 Difference]: Start difference. First operand 2749 states and 7496 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:07,937 INFO L93 Difference]: Finished difference Result 4577 states and 12242 transitions. [2021-06-05 17:53:07,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:53:07,937 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:07,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:07,945 INFO L225 Difference]: With dead ends: 4577 [2021-06-05 17:53:07,946 INFO L226 Difference]: Without dead ends: 4195 [2021-06-05 17:53:07,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:53:07,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-06-05 17:53:07,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 3079. [2021-06-05 17:53:07,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.748213125406108) internal successors, (8459), 3078 states have internal predecessors, (8459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:08,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8459 transitions. [2021-06-05 17:53:08,003 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8459 transitions. Word has length 52 [2021-06-05 17:53:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:08,003 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8459 transitions. [2021-06-05 17:53:08,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:08,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8459 transitions. [2021-06-05 17:53:08,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:08,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:08,007 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:08,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 17:53:08,221 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:08,221 INFO L82 PathProgramCache]: Analyzing trace with hash -873948249, now seen corresponding path program 3 times [2021-06-05 17:53:08,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:08,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246145319] [2021-06-05 17:53:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:08,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:08,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246145319] [2021-06-05 17:53:08,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246145319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:08,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965391647] [2021-06-05 17:53:08,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:08,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:53:08,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:08,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:53:08,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:08,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965391647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:08,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:08,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 17:53:08,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791028821] [2021-06-05 17:53:08,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:53:08,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:08,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:53:08,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:53:08,478 INFO L87 Difference]: Start difference. First operand 3079 states and 8459 transitions. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:08,612 INFO L93 Difference]: Finished difference Result 4154 states and 11067 transitions. [2021-06-05 17:53:08,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:53:08,612 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:08,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:08,619 INFO L225 Difference]: With dead ends: 4154 [2021-06-05 17:53:08,619 INFO L226 Difference]: Without dead ends: 4002 [2021-06-05 17:53:08,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:08,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2021-06-05 17:53:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 3176. [2021-06-05 17:53:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3176 states, 3175 states have (on average 2.733543307086614) internal successors, (8679), 3175 states have internal predecessors, (8679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3176 states to 3176 states and 8679 transitions. [2021-06-05 17:53:08,688 INFO L78 Accepts]: Start accepts. Automaton has 3176 states and 8679 transitions. Word has length 52 [2021-06-05 17:53:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:08,688 INFO L482 AbstractCegarLoop]: Abstraction has 3176 states and 8679 transitions. [2021-06-05 17:53:08,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3176 states and 8679 transitions. [2021-06-05 17:53:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:08,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:08,692 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:08,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 17:53:08,916 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:08,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:08,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1073540453, now seen corresponding path program 4 times [2021-06-05 17:53:08,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:08,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157828345] [2021-06-05 17:53:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:09,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:09,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157828345] [2021-06-05 17:53:09,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157828345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:09,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271471762] [2021-06-05 17:53:09,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:09,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:53:09,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:09,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:09,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:09,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271471762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:09,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:09,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:53:09,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173411856] [2021-06-05 17:53:09,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:53:09,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:09,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:53:09,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:53:09,361 INFO L87 Difference]: Start difference. First operand 3176 states and 8679 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:09,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:09,753 INFO L93 Difference]: Finished difference Result 5283 states and 14179 transitions. [2021-06-05 17:53:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:53:09,754 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:09,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:09,760 INFO L225 Difference]: With dead ends: 5283 [2021-06-05 17:53:09,760 INFO L226 Difference]: Without dead ends: 4901 [2021-06-05 17:53:09,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 439.0ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:53:09,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-06-05 17:53:09,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 3203. [2021-06-05 17:53:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.740474703310431) internal successors, (8775), 3202 states have internal predecessors, (8775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8775 transitions. [2021-06-05 17:53:09,828 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8775 transitions. Word has length 52 [2021-06-05 17:53:09,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:09,828 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8775 transitions. [2021-06-05 17:53:09,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8775 transitions. [2021-06-05 17:53:09,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:09,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:09,833 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:10,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 17:53:10,055 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:10,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:10,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1375261241, now seen corresponding path program 1 times [2021-06-05 17:53:10,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:10,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259799442] [2021-06-05 17:53:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:10,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:10,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259799442] [2021-06-05 17:53:10,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259799442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:10,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803034238] [2021-06-05 17:53:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:10,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:10,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:10,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803034238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:10,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:10,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:53:10,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955308330] [2021-06-05 17:53:10,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:53:10,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:10,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:53:10,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:53:10,393 INFO L87 Difference]: Start difference. First operand 3203 states and 8775 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:10,653 INFO L93 Difference]: Finished difference Result 4495 states and 11783 transitions. [2021-06-05 17:53:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:53:10,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:10,659 INFO L225 Difference]: With dead ends: 4495 [2021-06-05 17:53:10,659 INFO L226 Difference]: Without dead ends: 4343 [2021-06-05 17:53:10,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:53:10,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4343 states. [2021-06-05 17:53:10,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4343 to 3340. [2021-06-05 17:53:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 2.720275531596286) internal successors, (9083), 3339 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 9083 transitions. [2021-06-05 17:53:10,764 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 9083 transitions. Word has length 52 [2021-06-05 17:53:10,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:10,764 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 9083 transitions. [2021-06-05 17:53:10,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 9083 transitions. [2021-06-05 17:53:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:10,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:10,769 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:10,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:10,993 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:10,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:10,993 INFO L82 PathProgramCache]: Analyzing trace with hash -705460755, now seen corresponding path program 2 times [2021-06-05 17:53:10,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:10,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551167775] [2021-06-05 17:53:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:11,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:11,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551167775] [2021-06-05 17:53:11,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551167775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:11,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988317778] [2021-06-05 17:53:11,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:11,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:11,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:11,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:11,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:11,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988317778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:11,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:11,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:53:11,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245563195] [2021-06-05 17:53:11,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:53:11,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:11,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:53:11,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:53:11,322 INFO L87 Difference]: Start difference. First operand 3340 states and 9083 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:11,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:11,681 INFO L93 Difference]: Finished difference Result 4909 states and 12794 transitions. [2021-06-05 17:53:11,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:53:11,682 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:11,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:11,687 INFO L225 Difference]: With dead ends: 4909 [2021-06-05 17:53:11,688 INFO L226 Difference]: Without dead ends: 4757 [2021-06-05 17:53:11,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:53:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4757 states. [2021-06-05 17:53:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4757 to 3332. [2021-06-05 17:53:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 2.7469228459921946) internal successors, (9150), 3331 states have internal predecessors, (9150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 9150 transitions. [2021-06-05 17:53:11,749 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 9150 transitions. Word has length 52 [2021-06-05 17:53:11,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:11,750 INFO L482 AbstractCegarLoop]: Abstraction has 3332 states and 9150 transitions. [2021-06-05 17:53:11,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:11,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 9150 transitions. [2021-06-05 17:53:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:11,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:11,754 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:11,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 17:53:11,975 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:11,976 INFO L82 PathProgramCache]: Analyzing trace with hash 610535787, now seen corresponding path program 3 times [2021-06-05 17:53:11,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:11,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028816919] [2021-06-05 17:53:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:12,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:12,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028816919] [2021-06-05 17:53:12,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028816919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:12,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790354506] [2021-06-05 17:53:12,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:12,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:53:12,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:12,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:12,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:12,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790354506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:12,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:12,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:53:12,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22758963] [2021-06-05 17:53:12,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:53:12,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:12,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:53:12,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:53:12,295 INFO L87 Difference]: Start difference. First operand 3332 states and 9150 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:12,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:12,699 INFO L93 Difference]: Finished difference Result 4865 states and 13014 transitions. [2021-06-05 17:53:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:53:12,700 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:12,706 INFO L225 Difference]: With dead ends: 4865 [2021-06-05 17:53:12,706 INFO L226 Difference]: Without dead ends: 4713 [2021-06-05 17:53:12,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:53:12,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-06-05 17:53:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 3515. [2021-06-05 17:53:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3515 states, 3514 states have (on average 2.7583949914627204) internal successors, (9693), 3514 states have internal predecessors, (9693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3515 states to 3515 states and 9693 transitions. [2021-06-05 17:53:12,771 INFO L78 Accepts]: Start accepts. Automaton has 3515 states and 9693 transitions. Word has length 52 [2021-06-05 17:53:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:12,771 INFO L482 AbstractCegarLoop]: Abstraction has 3515 states and 9693 transitions. [2021-06-05 17:53:12,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3515 states and 9693 transitions. [2021-06-05 17:53:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:12,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:12,777 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:12,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:12,993 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash 550068275, now seen corresponding path program 4 times [2021-06-05 17:53:12,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:12,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917546450] [2021-06-05 17:53:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:13,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:13,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917546450] [2021-06-05 17:53:13,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917546450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:13,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692441897] [2021-06-05 17:53:13,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:13,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:53:13,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:13,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:13,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:13,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692441897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:13,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:13,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:53:13,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493973751] [2021-06-05 17:53:13,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:53:13,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:13,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:53:13,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:53:13,292 INFO L87 Difference]: Start difference. First operand 3515 states and 9693 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:13,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:13,919 INFO L93 Difference]: Finished difference Result 6692 states and 18060 transitions. [2021-06-05 17:53:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:53:13,920 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:13,925 INFO L225 Difference]: With dead ends: 6692 [2021-06-05 17:53:13,926 INFO L226 Difference]: Without dead ends: 6131 [2021-06-05 17:53:13,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 534.2ms TimeCoverageRelationStatistics Valid=488, Invalid=1674, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:53:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6131 states. [2021-06-05 17:53:13,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6131 to 3407. [2021-06-05 17:53:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 3406 states have (on average 2.768349970640047) internal successors, (9429), 3406 states have internal predecessors, (9429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 9429 transitions. [2021-06-05 17:53:13,997 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 9429 transitions. Word has length 52 [2021-06-05 17:53:13,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:13,998 INFO L482 AbstractCegarLoop]: Abstraction has 3407 states and 9429 transitions. [2021-06-05 17:53:13,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 9429 transitions. [2021-06-05 17:53:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:14,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:14,002 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:14,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 17:53:14,225 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:14,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1774703266, now seen corresponding path program 5 times [2021-06-05 17:53:14,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:14,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534328175] [2021-06-05 17:53:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:14,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:14,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534328175] [2021-06-05 17:53:14,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534328175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:14,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104895950] [2021-06-05 17:53:14,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:14,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:53:14,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:14,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:14,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:14,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104895950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:14,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:14,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:53:14,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928051572] [2021-06-05 17:53:14,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:53:14,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:14,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:53:14,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:53:14,622 INFO L87 Difference]: Start difference. First operand 3407 states and 9429 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:14,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:14,782 INFO L93 Difference]: Finished difference Result 4692 states and 12647 transitions. [2021-06-05 17:53:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:53:14,782 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:14,787 INFO L225 Difference]: With dead ends: 4692 [2021-06-05 17:53:14,787 INFO L226 Difference]: Without dead ends: 4540 [2021-06-05 17:53:14,787 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:53:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2021-06-05 17:53:14,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 3535. [2021-06-05 17:53:14,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 2.7637238256932655) internal successors, (9767), 3534 states have internal predecessors, (9767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 9767 transitions. [2021-06-05 17:53:14,842 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 9767 transitions. Word has length 57 [2021-06-05 17:53:14,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:14,842 INFO L482 AbstractCegarLoop]: Abstraction has 3535 states and 9767 transitions. [2021-06-05 17:53:14,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 9767 transitions. [2021-06-05 17:53:14,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:14,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:14,847 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:15,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 17:53:15,061 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:15,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:15,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1575111062, now seen corresponding path program 6 times [2021-06-05 17:53:15,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:15,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321683994] [2021-06-05 17:53:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:15,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:15,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321683994] [2021-06-05 17:53:15,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321683994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:15,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243248139] [2021-06-05 17:53:15,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:15,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:53:15,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:15,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:53:15,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:15,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243248139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:15,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:15,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 17:53:15,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147652717] [2021-06-05 17:53:15,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:53:15,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:15,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:53:15,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:53:15,357 INFO L87 Difference]: Start difference. First operand 3535 states and 9767 transitions. Second operand has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:15,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:15,663 INFO L93 Difference]: Finished difference Result 6127 states and 16569 transitions. [2021-06-05 17:53:15,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:53:15,664 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:15,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:15,671 INFO L225 Difference]: With dead ends: 6127 [2021-06-05 17:53:15,671 INFO L226 Difference]: Without dead ends: 5745 [2021-06-05 17:53:15,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:53:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2021-06-05 17:53:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 3442. [2021-06-05 17:53:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3442 states, 3441 states have (on average 2.7625690206335367) internal successors, (9506), 3441 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 9506 transitions. [2021-06-05 17:53:15,738 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 9506 transitions. Word has length 57 [2021-06-05 17:53:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:15,738 INFO L482 AbstractCegarLoop]: Abstraction has 3442 states and 9506 transitions. [2021-06-05 17:53:15,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 9506 transitions. [2021-06-05 17:53:15,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:15,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:15,743 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:15,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 17:53:15,961 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:15,961 INFO L82 PathProgramCache]: Analyzing trace with hash 948902018, now seen corresponding path program 5 times [2021-06-05 17:53:15,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:15,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172518149] [2021-06-05 17:53:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:16,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:16,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172518149] [2021-06-05 17:53:16,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172518149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:16,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45211271] [2021-06-05 17:53:16,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:16,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:53:16,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:16,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:16,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:16,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45211271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:16,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:16,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:53:16,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589503200] [2021-06-05 17:53:16,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:53:16,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:16,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:53:16,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:53:16,347 INFO L87 Difference]: Start difference. First operand 3442 states and 9506 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:16,594 INFO L93 Difference]: Finished difference Result 4903 states and 12991 transitions. [2021-06-05 17:53:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:53:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:16,599 INFO L225 Difference]: With dead ends: 4903 [2021-06-05 17:53:16,599 INFO L226 Difference]: Without dead ends: 4751 [2021-06-05 17:53:16,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:53:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-06-05 17:53:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3495. [2021-06-05 17:53:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 3494 states have (on average 2.757298225529479) internal successors, (9634), 3494 states have internal predecessors, (9634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 9634 transitions. [2021-06-05 17:53:16,656 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 9634 transitions. Word has length 57 [2021-06-05 17:53:16,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:16,657 INFO L482 AbstractCegarLoop]: Abstraction has 3495 states and 9634 transitions. [2021-06-05 17:53:16,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:16,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 9634 transitions. [2021-06-05 17:53:16,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:16,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:16,662 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:16,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 17:53:16,876 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:16,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1297423950, now seen corresponding path program 6 times [2021-06-05 17:53:16,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:16,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933807411] [2021-06-05 17:53:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:16,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:16,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933807411] [2021-06-05 17:53:16,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933807411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:16,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772683400] [2021-06-05 17:53:16,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:17,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:53:17,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:17,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:17,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:17,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772683400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:17,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:17,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:53:17,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752138620] [2021-06-05 17:53:17,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:53:17,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:17,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:53:17,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:53:17,225 INFO L87 Difference]: Start difference. First operand 3495 states and 9634 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:17,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:17,569 INFO L93 Difference]: Finished difference Result 5102 states and 13767 transitions. [2021-06-05 17:53:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:53:17,570 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:17,575 INFO L225 Difference]: With dead ends: 5102 [2021-06-05 17:53:17,575 INFO L226 Difference]: Without dead ends: 4950 [2021-06-05 17:53:17,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 329.1ms TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:53:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4950 states. [2021-06-05 17:53:17,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4950 to 3615. [2021-06-05 17:53:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3614 states have (on average 2.7695074709463197) internal successors, (10009), 3614 states have internal predecessors, (10009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 10009 transitions. [2021-06-05 17:53:17,635 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 10009 transitions. Word has length 57 [2021-06-05 17:53:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:17,635 INFO L482 AbstractCegarLoop]: Abstraction has 3615 states and 10009 transitions. [2021-06-05 17:53:17,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 10009 transitions. [2021-06-05 17:53:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:17,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:17,640 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:17,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 17:53:17,864 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:17,864 INFO L82 PathProgramCache]: Analyzing trace with hash -602695052, now seen corresponding path program 7 times [2021-06-05 17:53:17,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:17,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961557452] [2021-06-05 17:53:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:17,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:17,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961557452] [2021-06-05 17:53:17,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961557452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:17,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869311820] [2021-06-05 17:53:17,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:18,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:18,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:18,557 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 14 [2021-06-05 17:53:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:18,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869311820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:18,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:18,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:53:18,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904701117] [2021-06-05 17:53:18,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:53:18,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:18,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:53:18,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:53:18,591 INFO L87 Difference]: Start difference. First operand 3615 states and 10009 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:19,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:19,247 INFO L93 Difference]: Finished difference Result 7316 states and 19720 transitions. [2021-06-05 17:53:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:53:19,247 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:19,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:19,254 INFO L225 Difference]: With dead ends: 7316 [2021-06-05 17:53:19,255 INFO L226 Difference]: Without dead ends: 6758 [2021-06-05 17:53:19,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 903.5ms TimeCoverageRelationStatistics Valid=483, Invalid=1869, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:53:19,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6758 states. [2021-06-05 17:53:19,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6758 to 3478. [2021-06-05 17:53:19,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3477 states have (on average 2.7822835777969512) internal successors, (9674), 3477 states have internal predecessors, (9674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 9674 transitions. [2021-06-05 17:53:19,328 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 9674 transitions. Word has length 57 [2021-06-05 17:53:19,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:19,328 INFO L482 AbstractCegarLoop]: Abstraction has 3478 states and 9674 transitions. [2021-06-05 17:53:19,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 9674 transitions. [2021-06-05 17:53:19,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:19,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:19,334 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:19,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:19,541 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:19,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:19,542 INFO L82 PathProgramCache]: Analyzing trace with hash -271054540, now seen corresponding path program 8 times [2021-06-05 17:53:19,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:19,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105909250] [2021-06-05 17:53:19,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:19,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:19,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105909250] [2021-06-05 17:53:19,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105909250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:19,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707198966] [2021-06-05 17:53:19,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:19,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:19,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:19,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:19,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:19,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707198966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:19,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:19,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:53:19,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845253975] [2021-06-05 17:53:19,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:53:19,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:19,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:53:19,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:53:19,922 INFO L87 Difference]: Start difference. First operand 3478 states and 9674 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:20,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:20,234 INFO L93 Difference]: Finished difference Result 5207 states and 13699 transitions. [2021-06-05 17:53:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:53:20,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:20,239 INFO L225 Difference]: With dead ends: 5207 [2021-06-05 17:53:20,240 INFO L226 Difference]: Without dead ends: 5055 [2021-06-05 17:53:20,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 348.3ms TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:53:20,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5055 states. [2021-06-05 17:53:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5055 to 3543. [2021-06-05 17:53:20,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 2.7707509881422925) internal successors, (9814), 3542 states have internal predecessors, (9814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 9814 transitions. [2021-06-05 17:53:20,288 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 9814 transitions. Word has length 57 [2021-06-05 17:53:20,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:20,288 INFO L482 AbstractCegarLoop]: Abstraction has 3543 states and 9814 transitions. [2021-06-05 17:53:20,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 9814 transitions. [2021-06-05 17:53:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:20,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:20,294 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:20,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 17:53:20,499 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:20,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:20,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1943190760, now seen corresponding path program 9 times [2021-06-05 17:53:20,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:20,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541238459] [2021-06-05 17:53:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:20,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:20,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541238459] [2021-06-05 17:53:20,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541238459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:20,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449858301] [2021-06-05 17:53:20,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:20,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:53:20,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:20,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:53:20,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:20,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449858301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:20,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:20,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:53:20,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928748962] [2021-06-05 17:53:20,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:53:20,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:20,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:53:20,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:20,843 INFO L87 Difference]: Start difference. First operand 3543 states and 9814 transitions. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:21,261 INFO L93 Difference]: Finished difference Result 5749 states and 15067 transitions. [2021-06-05 17:53:21,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:53:21,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:21,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:21,269 INFO L225 Difference]: With dead ends: 5749 [2021-06-05 17:53:21,269 INFO L226 Difference]: Without dead ends: 5509 [2021-06-05 17:53:21,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:53:21,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5509 states. [2021-06-05 17:53:21,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5509 to 3668. [2021-06-05 17:53:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3668 states, 3667 states have (on average 2.775838560130897) internal successors, (10179), 3667 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 10179 transitions. [2021-06-05 17:53:21,327 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 10179 transitions. Word has length 57 [2021-06-05 17:53:21,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:21,327 INFO L482 AbstractCegarLoop]: Abstraction has 3668 states and 10179 transitions. [2021-06-05 17:53:21,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:21,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 10179 transitions. [2021-06-05 17:53:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:21,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:21,332 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:21,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:21,532 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:21,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:21,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1035779994, now seen corresponding path program 10 times [2021-06-05 17:53:21,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:21,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428527494] [2021-06-05 17:53:21,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:21,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:21,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428527494] [2021-06-05 17:53:21,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428527494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:21,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727245011] [2021-06-05 17:53:21,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:21,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:53:21,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:21,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:21,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:21,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727245011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:21,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:21,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:53:21,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122300617] [2021-06-05 17:53:21,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:53:21,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:21,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:53:21,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:53:21,907 INFO L87 Difference]: Start difference. First operand 3668 states and 10179 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:22,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:22,369 INFO L93 Difference]: Finished difference Result 6147 states and 16560 transitions. [2021-06-05 17:53:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:53:22,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:22,376 INFO L225 Difference]: With dead ends: 6147 [2021-06-05 17:53:22,376 INFO L226 Difference]: Without dead ends: 5995 [2021-06-05 17:53:22,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 477.3ms TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 17:53:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2021-06-05 17:53:22,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 3798. [2021-06-05 17:53:22,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 2.809849881485383) internal successors, (10669), 3797 states have internal predecessors, (10669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 10669 transitions. [2021-06-05 17:53:22,424 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 10669 transitions. Word has length 57 [2021-06-05 17:53:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:22,424 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 10669 transitions. [2021-06-05 17:53:22,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 10669 transitions. [2021-06-05 17:53:22,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:22,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:22,430 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:22,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 17:53:22,640 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:22,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:22,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1096247506, now seen corresponding path program 11 times [2021-06-05 17:53:22,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:22,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938611277] [2021-06-05 17:53:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:22,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:22,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938611277] [2021-06-05 17:53:22,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938611277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:22,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695654051] [2021-06-05 17:53:22,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:22,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:53:22,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:22,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates...