/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_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-04 21:12:23,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-04 21:12:23,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-04 21:12:23,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-04 21:12:23,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-04 21:12:23,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-04 21:12:23,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-04 21:12:23,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-04 21:12:23,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-04 21:12:23,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-04 21:12:23,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-04 21:12:23,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-04 21:12:23,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-04 21:12:23,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-04 21:12:23,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-04 21:12:23,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-04 21:12:23,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-04 21:12:23,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-04 21:12:23,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-04 21:12:23,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-04 21:12:23,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-04 21:12:23,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-04 21:12:23,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-04 21:12:23,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-04 21:12:23,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-04 21:12:23,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-04 21:12:23,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-04 21:12:23,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-04 21:12:23,701 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 [2021-06-04 21:12:23,733 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-04 21:12:23,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-04 21:12:23,734 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-04 21:12:23,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-04 21:12:23,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-04 21:12:23,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-04 21:12:23,736 INFO L138 SettingsManager]: * Use SBE=true [2021-06-04 21:12:23,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-04 21:12:23,736 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-04 21:12:23,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-04 21:12:23,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-04 21:12:23,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-04 21:12:23,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-04 21:12:23,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-04 21:12:23,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-04 21:12:23,737 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-04 21:12:23,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-04 21:12:23,738 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-04 21:12:23,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-04 21:12:23,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-04 21:12:23,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-04 21:12:23,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-04 21:12:23,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-04 21:12:23,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-04 21:12:23,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-04 21:12:23,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-04 21:12:23,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-04 21:12:23,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-04 21:12:23,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-04 21:12:23,739 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-04 21:12:23,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-04 21:12:23,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-04 21:12:24,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-04 21:12:24,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-04 21:12:24,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-04 21:12:24,733 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-04 21:12:24,733 INFO L275 PluginConnector]: CDTParser initialized [2021-06-04 21:12:24,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2021-06-04 21:12:24,775 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77825372c/8864c18343024323ad831aa2ea8826da/FLAG7c406b401 [2021-06-04 21:12:25,339 INFO L306 CDTParser]: Found 1 translation units. [2021-06-04 21:12:25,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2021-06-04 21:12:25,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77825372c/8864c18343024323ad831aa2ea8826da/FLAG7c406b401 [2021-06-04 21:12:25,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77825372c/8864c18343024323ad831aa2ea8826da [2021-06-04 21:12:25,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-04 21:12:25,800 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-04 21:12:25,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-04 21:12:25,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-04 21:12:25,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-04 21:12:25,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 09:12:25" (1/1) ... [2021-06-04 21:12:25,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a16a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:25, skipping insertion in model container [2021-06-04 21:12:25,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 09:12:25" (1/1) ... [2021-06-04 21:12:25,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-04 21:12:25,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-04 21:12:26,081 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_longer-2.i[30929,30942] [2021-06-04 21:12:26,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-04 21:12:26,098 INFO L203 MainTranslator]: Completed pre-run [2021-06-04 21:12:26,132 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_longer-2.i[30929,30942] [2021-06-04 21:12:26,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-04 21:12:26,174 INFO L208 MainTranslator]: Completed translation [2021-06-04 21:12:26,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26 WrapperNode [2021-06-04 21:12:26,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-04 21:12:26,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-04 21:12:26,175 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-04 21:12:26,175 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-04 21:12:26,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-04 21:12:26,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-04 21:12:26,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-04 21:12:26,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-04 21:12:26,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-04 21:12:26,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-04 21:12:26,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-04 21:12:26,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-04 21:12:26,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (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 [2021-06-04 21:12:26,319 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-04 21:12:26,320 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-04 21:12:26,320 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-04 21:12:26,320 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-04 21:12:26,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-04 21:12:26,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-04 21:12:26,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-04 21:12:26,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-04 21:12:26,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-04 21:12:26,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-04 21:12:26,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-04 21:12:26,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-04 21:12:26,323 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-04 21:12:26,638 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-04 21:12:26,639 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-04 21:12:26,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 09:12:26 BoogieIcfgContainer [2021-06-04 21:12:26,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-04 21:12:26,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-04 21:12:26,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-04 21:12:26,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-04 21:12:26,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 09:12:25" (1/3) ... [2021-06-04 21:12:26,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ebeed6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 09:12:26, skipping insertion in model container [2021-06-04 21:12:26,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (2/3) ... [2021-06-04 21:12:26,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ebeed6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 09:12:26, skipping insertion in model container [2021-06-04 21:12:26,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 09:12:26" (3/3) ... [2021-06-04 21:12:26,645 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2021-06-04 21:12:26,649 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-04 21:12:26,649 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-04 21:12:26,649 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-04 21:12:26,650 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-04 21:12:26,676 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,677 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,677 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,677 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,677 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,677 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,677 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,677 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,678 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,678 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,678 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,678 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,678 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,678 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,679 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,679 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,679 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,679 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,679 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,679 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,679 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,680 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,680 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,680 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,681 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,681 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,681 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,681 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,681 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,681 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,682 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,682 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,682 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,682 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,682 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,683 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,683 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,683 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,683 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,683 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,683 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,683 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,683 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,684 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,684 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,684 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,684 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,684 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,684 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,684 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,686 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,686 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,686 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,686 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,686 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,686 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,686 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,686 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,687 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,687 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,688 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,688 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,689 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,697 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,697 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,698 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,698 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,698 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,699 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,700 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-04 21:12:26,714 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-04 21:12:26,725 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-04 21:12:26,725 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-04 21:12:26,725 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-04 21:12:26,725 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-04 21:12:26,725 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-04 21:12:26,726 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-04 21:12:26,726 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-04 21:12:26,726 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-04 21:12:26,732 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-06-04 21:12:26,814 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) [2021-06-04 21:12:26,819 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) [2021-06-04 21:12:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-04 21:12:26,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:26,838 INFO L521 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] [2021-06-04 21:12:26,838 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:26,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:26,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-06-04 21:12:26,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:26,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379362056] [2021-06-04 21:12:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:27,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:27,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379362056] [2021-06-04 21:12:27,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379362056] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:12:27,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:12:27,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-04 21:12:27,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577474608] [2021-06-04 21:12:27,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-04 21:12:27,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:27,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-04 21:12:27,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-04 21:12:27,124 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) [2021-06-04 21:12:27,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:27,237 INFO L93 Difference]: Finished difference Result 3996 states and 11572 transitions. [2021-06-04 21:12:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-04 21:12:27,239 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 [2021-06-04 21:12:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:27,253 INFO L225 Difference]: With dead ends: 3996 [2021-06-04 21:12:27,253 INFO L226 Difference]: Without dead ends: 1425 [2021-06-04 21:12:27,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:12:27,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-04 21:12:27,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-06-04 21:12:27,326 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) [2021-06-04 21:12:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-06-04 21:12:27,330 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-06-04 21:12:27,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:27,330 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-06-04 21:12:27,330 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) [2021-06-04 21:12:27,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-06-04 21:12:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-04 21:12:27,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:27,333 INFO L521 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] [2021-06-04 21:12:27,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-04 21:12:27,334 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:27,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:27,334 INFO L82 PathProgramCache]: Analyzing trace with hash -730808461, now seen corresponding path program 1 times [2021-06-04 21:12:27,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:27,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903541624] [2021-06-04 21:12:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:27,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:27,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903541624] [2021-06-04 21:12:27,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903541624] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:12:27,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:12:27,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:12:27,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876659119] [2021-06-04 21:12:27,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:12:27,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:27,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:12:27,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:12:27,468 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) [2021-06-04 21:12:27,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:27,562 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-06-04 21:12:27,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-04 21:12:27,562 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 [2021-06-04 21:12:27,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:27,571 INFO L225 Difference]: With dead ends: 2025 [2021-06-04 21:12:27,571 INFO L226 Difference]: Without dead ends: 1758 [2021-06-04 21:12:27,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:12:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-04 21:12:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-06-04 21:12:27,607 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) [2021-06-04 21:12:27,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-06-04 21:12:27,611 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-06-04 21:12:27,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:27,612 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-06-04 21:12:27,612 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) [2021-06-04 21:12:27,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-06-04 21:12:27,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-04 21:12:27,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:27,614 INFO L521 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] [2021-06-04 21:12:27,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-04 21:12:27,615 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:27,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-06-04 21:12:27,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:27,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881440617] [2021-06-04 21:12:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:27,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:27,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881440617] [2021-06-04 21:12:27,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881440617] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:12:27,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:12:27,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:12:27,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850436720] [2021-06-04 21:12:27,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:12:27,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:27,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:12:27,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:12:27,710 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) [2021-06-04 21:12:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:27,798 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-06-04 21:12:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-04 21:12:27,799 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 [2021-06-04 21:12:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:27,805 INFO L225 Difference]: With dead ends: 2062 [2021-06-04 21:12:27,805 INFO L226 Difference]: Without dead ends: 1758 [2021-06-04 21:12:27,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:12:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-04 21:12:27,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-06-04 21:12:27,828 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) [2021-06-04 21:12:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-06-04 21:12:27,832 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-06-04 21:12:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:27,832 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-06-04 21:12:27,832 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) [2021-06-04 21:12:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-06-04 21:12:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-04 21:12:27,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:27,833 INFO L521 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] [2021-06-04 21:12:27,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-04 21:12:27,833 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:27,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:27,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-06-04 21:12:27,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:27,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745025250] [2021-06-04 21:12:27,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:27,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:27,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745025250] [2021-06-04 21:12:27,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745025250] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:12:27,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:12:27,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:12:27,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915400009] [2021-06-04 21:12:27,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:12:27,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:27,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:12:27,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:12:27,895 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) [2021-06-04 21:12:27,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:27,970 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-06-04 21:12:27,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-04 21:12:27,971 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 [2021-06-04 21:12:27,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:27,977 INFO L225 Difference]: With dead ends: 2318 [2021-06-04 21:12:27,978 INFO L226 Difference]: Without dead ends: 1987 [2021-06-04 21:12:27,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:12:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-06-04 21:12:28,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-06-04 21:12:28,003 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) [2021-06-04 21:12:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-06-04 21:12:28,007 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-06-04 21:12:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:28,008 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-06-04 21:12:28,008 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) [2021-06-04 21:12:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-06-04 21:12:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-04 21:12:28,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:28,010 INFO L521 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] [2021-06-04 21:12:28,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-04 21:12:28,010 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1553921205, now seen corresponding path program 1 times [2021-06-04 21:12:28,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:28,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3401515] [2021-06-04 21:12:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:28,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:28,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3401515] [2021-06-04 21:12:28,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3401515] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:12:28,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:12:28,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-04 21:12:28,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982554654] [2021-06-04 21:12:28,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-04 21:12:28,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:28,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-04 21:12:28,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-04 21:12:28,100 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:28,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:28,160 INFO L93 Difference]: Finished difference Result 2203 states and 5812 transitions. [2021-06-04 21:12:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-04 21:12:28,160 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 [2021-06-04 21:12:28,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:28,166 INFO L225 Difference]: With dead ends: 2203 [2021-06-04 21:12:28,166 INFO L226 Difference]: Without dead ends: 2051 [2021-06-04 21:12:28,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:12:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-04 21:12:28,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1539. [2021-06-04 21:12:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 2.6937581274382314) internal successors, (4143), 1538 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 4143 transitions. [2021-06-04 21:12:28,197 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 4143 transitions. Word has length 42 [2021-06-04 21:12:28,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:28,197 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 4143 transitions. [2021-06-04 21:12:28,197 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) [2021-06-04 21:12:28,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 4143 transitions. [2021-06-04 21:12:28,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-04 21:12:28,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:28,199 INFO L521 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] [2021-06-04 21:12:28,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-04 21:12:28,199 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:28,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:28,200 INFO L82 PathProgramCache]: Analyzing trace with hash 591722429, now seen corresponding path program 2 times [2021-06-04 21:12:28,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:28,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801882124] [2021-06-04 21:12:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:28,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:28,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801882124] [2021-06-04 21:12:28,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801882124] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:12:28,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:12:28,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-04 21:12:28,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599459005] [2021-06-04 21:12:28,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-04 21:12:28,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:28,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-04 21:12:28,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-04 21:12:28,289 INFO L87 Difference]: Start difference. First operand 1539 states and 4143 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) [2021-06-04 21:12:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:28,418 INFO L93 Difference]: Finished difference Result 2907 states and 7732 transitions. [2021-06-04 21:12:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:12:28,418 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 [2021-06-04 21:12:28,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:28,426 INFO L225 Difference]: With dead ends: 2907 [2021-06-04 21:12:28,426 INFO L226 Difference]: Without dead ends: 2461 [2021-06-04 21:12:28,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:12:28,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-06-04 21:12:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1731. [2021-06-04 21:12:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.707514450867052) internal successors, (4684), 1730 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:28,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 4684 transitions. [2021-06-04 21:12:28,486 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 4684 transitions. Word has length 42 [2021-06-04 21:12:28,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:28,486 INFO L482 AbstractCegarLoop]: Abstraction has 1731 states and 4684 transitions. [2021-06-04 21:12:28,486 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) [2021-06-04 21:12:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 4684 transitions. [2021-06-04 21:12:28,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-04 21:12:28,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:28,488 INFO L521 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] [2021-06-04 21:12:28,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-04 21:12:28,488 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:28,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:28,489 INFO L82 PathProgramCache]: Analyzing trace with hash -535397893, now seen corresponding path program 3 times [2021-06-04 21:12:28,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:28,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288686234] [2021-06-04 21:12:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:28,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:28,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288686234] [2021-06-04 21:12:28,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288686234] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:12:28,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:12:28,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-04 21:12:28,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557034092] [2021-06-04 21:12:28,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-04 21:12:28,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:28,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-04 21:12:28,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-04 21:12:28,548 INFO L87 Difference]: Start difference. First operand 1731 states and 4684 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:28,670 INFO L93 Difference]: Finished difference Result 3149 states and 8380 transitions. [2021-06-04 21:12:28,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-04 21:12:28,670 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 [2021-06-04 21:12:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:28,679 INFO L225 Difference]: With dead ends: 3149 [2021-06-04 21:12:28,679 INFO L226 Difference]: Without dead ends: 2834 [2021-06-04 21:12:28,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:12:28,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-06-04 21:12:28,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1941. [2021-06-04 21:12:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.6943298969072167) internal successors, (5227), 1940 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5227 transitions. [2021-06-04 21:12:28,722 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5227 transitions. Word has length 42 [2021-06-04 21:12:28,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:28,723 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 5227 transitions. [2021-06-04 21:12:28,723 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) [2021-06-04 21:12:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5227 transitions. [2021-06-04 21:12:28,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-04 21:12:28,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:28,725 INFO L521 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] [2021-06-04 21:12:28,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-04 21:12:28,725 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:28,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:28,725 INFO L82 PathProgramCache]: Analyzing trace with hash 847069600, now seen corresponding path program 1 times [2021-06-04 21:12:28,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:28,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253133040] [2021-06-04 21:12:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:28,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:28,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253133040] [2021-06-04 21:12:28,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253133040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:28,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590751821] [2021-06-04 21:12:28,796 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 [2021-06-04 21:12:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:28,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:12:28,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:29,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590751821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:29,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:29,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-04 21:12:29,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179777484] [2021-06-04 21:12:29,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:12:29,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:29,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:12:29,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:12:29,158 INFO L87 Difference]: Start difference. First operand 1941 states and 5227 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:29,320 INFO L93 Difference]: Finished difference Result 3261 states and 8492 transitions. [2021-06-04 21:12:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-04 21:12:29,320 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 [2021-06-04 21:12:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:29,329 INFO L225 Difference]: With dead ends: 3261 [2021-06-04 21:12:29,329 INFO L226 Difference]: Without dead ends: 2781 [2021-06-04 21:12:29,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:12:29,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-06-04 21:12:29,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2030. [2021-06-04 21:12:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 2.6638738294726467) internal successors, (5405), 2029 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 5405 transitions. [2021-06-04 21:12:29,371 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 5405 transitions. Word has length 47 [2021-06-04 21:12:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:29,371 INFO L482 AbstractCegarLoop]: Abstraction has 2030 states and 5405 transitions. [2021-06-04 21:12:29,371 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) [2021-06-04 21:12:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 5405 transitions. [2021-06-04 21:12:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-04 21:12:29,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:29,373 INFO L521 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] [2021-06-04 21:12:29,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-04 21:12:29,593 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:29,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1597229004, now seen corresponding path program 2 times [2021-06-04 21:12:29,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:29,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355500040] [2021-06-04 21:12:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:29,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:29,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355500040] [2021-06-04 21:12:29,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355500040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:29,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762879621] [2021-06-04 21:12:29,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:29,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:12:29,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:29,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:12:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:29,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762879621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:29,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:29,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-04 21:12:29,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662822409] [2021-06-04 21:12:29,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:12:29,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:29,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:12:29,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:12:29,945 INFO L87 Difference]: Start difference. First operand 2030 states and 5405 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) [2021-06-04 21:12:30,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:30,080 INFO L93 Difference]: Finished difference Result 3013 states and 7804 transitions. [2021-06-04 21:12:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-04 21:12:30,081 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 [2021-06-04 21:12:30,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:30,095 INFO L225 Difference]: With dead ends: 3013 [2021-06-04 21:12:30,095 INFO L226 Difference]: Without dead ends: 2861 [2021-06-04 21:12:30,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:12:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-04 21:12:30,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2064. [2021-06-04 21:12:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.6539020843431897) internal successors, (5475), 2063 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:30,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5475 transitions. [2021-06-04 21:12:30,129 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5475 transitions. Word has length 47 [2021-06-04 21:12:30,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:30,129 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5475 transitions. [2021-06-04 21:12:30,129 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) [2021-06-04 21:12:30,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5475 transitions. [2021-06-04 21:12:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-04 21:12:30,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:30,132 INFO L521 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] [2021-06-04 21:12:30,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:30,345 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:30,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:30,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1224443028, now seen corresponding path program 3 times [2021-06-04 21:12:30,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:30,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782707987] [2021-06-04 21:12:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:30,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:30,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782707987] [2021-06-04 21:12:30,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782707987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:30,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997641895] [2021-06-04 21:12:30,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:30,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-04 21:12:30,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:30,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:12:30,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:30,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997641895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:30,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:30,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-04 21:12:30,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478255798] [2021-06-04 21:12:30,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:12:30,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:30,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:12:30,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:12:30,595 INFO L87 Difference]: Start difference. First operand 2064 states and 5475 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) [2021-06-04 21:12:30,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:30,747 INFO L93 Difference]: Finished difference Result 3525 states and 9020 transitions. [2021-06-04 21:12:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:12:30,747 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 [2021-06-04 21:12:30,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:30,752 INFO L225 Difference]: With dead ends: 3525 [2021-06-04 21:12:30,752 INFO L226 Difference]: Without dead ends: 3045 [2021-06-04 21:12:30,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:12:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-06-04 21:12:30,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2094. [2021-06-04 21:12:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 2.661729574773053) internal successors, (5571), 2093 states have internal predecessors, (5571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 5571 transitions. [2021-06-04 21:12:30,799 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 5571 transitions. Word has length 47 [2021-06-04 21:12:30,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:30,799 INFO L482 AbstractCegarLoop]: Abstraction has 2094 states and 5571 transitions. [2021-06-04 21:12:30,799 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) [2021-06-04 21:12:30,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 5571 transitions. [2021-06-04 21:12:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-04 21:12:30,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:30,802 INFO L521 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] [2021-06-04 21:12:31,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-04 21:12:31,017 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:31,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:31,017 INFO L82 PathProgramCache]: Analyzing trace with hash 511209706, now seen corresponding path program 4 times [2021-06-04 21:12:31,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:31,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945093714] [2021-06-04 21:12:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:31,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:31,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945093714] [2021-06-04 21:12:31,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945093714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:31,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923547890] [2021-06-04 21:12:31,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:31,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:12:31,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:31,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:12:31,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:31,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923547890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:31,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:31,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-04 21:12:31,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204482160] [2021-06-04 21:12:31,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:12:31,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:31,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:12:31,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:12:31,260 INFO L87 Difference]: Start difference. First operand 2094 states and 5571 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) [2021-06-04 21:12:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:31,513 INFO L93 Difference]: Finished difference Result 4570 states and 11964 transitions. [2021-06-04 21:12:31,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:12:31,514 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 [2021-06-04 21:12:31,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:31,520 INFO L225 Difference]: With dead ends: 4570 [2021-06-04 21:12:31,520 INFO L226 Difference]: Without dead ends: 3833 [2021-06-04 21:12:31,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:12:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-06-04 21:12:31,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 2235. [2021-06-04 21:12:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 2.6965085049239033) internal successors, (6024), 2234 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 6024 transitions. [2021-06-04 21:12:31,556 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 6024 transitions. Word has length 47 [2021-06-04 21:12:31,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:31,557 INFO L482 AbstractCegarLoop]: Abstraction has 2235 states and 6024 transitions. [2021-06-04 21:12:31,557 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) [2021-06-04 21:12:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 6024 transitions. [2021-06-04 21:12:31,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-04 21:12:31,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:31,559 INFO L521 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] [2021-06-04 21:12:31,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:31,769 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:31,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:31,769 INFO L82 PathProgramCache]: Analyzing trace with hash 464719534, now seen corresponding path program 5 times [2021-06-04 21:12:31,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:31,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613913964] [2021-06-04 21:12:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:31,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:31,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613913964] [2021-06-04 21:12:31,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613913964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:31,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840505942] [2021-06-04 21:12:31,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:31,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:12:31,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:31,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:12:31,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:32,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840505942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:32,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:32,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-04 21:12:32,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998169635] [2021-06-04 21:12:32,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:12:32,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:32,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:12:32,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:12:32,049 INFO L87 Difference]: Start difference. First operand 2235 states and 6024 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) [2021-06-04 21:12:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:32,258 INFO L93 Difference]: Finished difference Result 4350 states and 11284 transitions. [2021-06-04 21:12:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:12:32,258 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 [2021-06-04 21:12:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:32,264 INFO L225 Difference]: With dead ends: 4350 [2021-06-04 21:12:32,264 INFO L226 Difference]: Without dead ends: 3958 [2021-06-04 21:12:32,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:12:32,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2021-06-04 21:12:32,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 2423. [2021-06-04 21:12:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.7345169281585466) internal successors, (6623), 2422 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6623 transitions. [2021-06-04 21:12:32,304 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6623 transitions. Word has length 47 [2021-06-04 21:12:32,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:32,304 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 6623 transitions. [2021-06-04 21:12:32,304 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) [2021-06-04 21:12:32,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6623 transitions. [2021-06-04 21:12:32,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-04 21:12:32,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:32,307 INFO L521 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] [2021-06-04 21:12:32,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:32,521 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash 920243988, now seen corresponding path program 6 times [2021-06-04 21:12:32,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:32,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525545410] [2021-06-04 21:12:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:32,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:32,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525545410] [2021-06-04 21:12:32,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525545410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:32,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432008151] [2021-06-04 21:12:32,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:32,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-04 21:12:32,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:32,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:12:32,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:32,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432008151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:32,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:32,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-04 21:12:32,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586664134] [2021-06-04 21:12:32,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:12:32,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:32,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:12:32,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:12:32,769 INFO L87 Difference]: Start difference. First operand 2423 states and 6623 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:33,333 INFO L93 Difference]: Finished difference Result 5771 states and 15228 transitions. [2021-06-04 21:12:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:12:33,333 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 [2021-06-04 21:12:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:33,343 INFO L225 Difference]: With dead ends: 5771 [2021-06-04 21:12:33,343 INFO L226 Difference]: Without dead ends: 4898 [2021-06-04 21:12:33,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 432.6ms TimeCoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:12:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-06-04 21:12:33,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2817. [2021-06-04 21:12:33,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.7169744318181817) internal successors, (7651), 2816 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:33,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 7651 transitions. [2021-06-04 21:12:33,402 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 7651 transitions. Word has length 47 [2021-06-04 21:12:33,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:33,402 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 7651 transitions. [2021-06-04 21:12:33,402 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) [2021-06-04 21:12:33,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 7651 transitions. [2021-06-04 21:12:33,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:33,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:33,406 INFO L521 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] [2021-06-04 21:12:33,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:33,621 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:33,621 INFO L82 PathProgramCache]: Analyzing trace with hash 117458473, now seen corresponding path program 7 times [2021-06-04 21:12:33,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:33,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016298220] [2021-06-04 21:12:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:33,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:33,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016298220] [2021-06-04 21:12:33,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016298220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:33,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571435575] [2021-06-04 21:12:33,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:33,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:33,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:33,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571435575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:33,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:33,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-04 21:12:33,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040946498] [2021-06-04 21:12:33,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:12:33,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:33,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:12:33,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:12:33,866 INFO L87 Difference]: Start difference. First operand 2817 states and 7651 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) [2021-06-04 21:12:34,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:34,070 INFO L93 Difference]: Finished difference Result 4391 states and 11330 transitions. [2021-06-04 21:12:34,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:12:34,070 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 [2021-06-04 21:12:34,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:34,079 INFO L225 Difference]: With dead ends: 4391 [2021-06-04 21:12:34,080 INFO L226 Difference]: Without dead ends: 3999 [2021-06-04 21:12:34,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:12:34,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-06-04 21:12:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 2932. [2021-06-04 21:12:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2932 states, 2931 states have (on average 2.6939611054247696) internal successors, (7896), 2931 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 7896 transitions. [2021-06-04 21:12:34,116 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 7896 transitions. Word has length 52 [2021-06-04 21:12:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:34,117 INFO L482 AbstractCegarLoop]: Abstraction has 2932 states and 7896 transitions. [2021-06-04 21:12:34,117 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) [2021-06-04 21:12:34,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 7896 transitions. [2021-06-04 21:12:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:34,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:34,120 INFO L521 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] [2021-06-04 21:12:34,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-04 21:12:34,340 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:34,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:34,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1743674851, now seen corresponding path program 1 times [2021-06-04 21:12:34,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:34,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992327940] [2021-06-04 21:12:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:34,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:34,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992327940] [2021-06-04 21:12:34,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992327940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:34,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222973074] [2021-06-04 21:12:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-04 21:12:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:34,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:34,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:34,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222973074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:34,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:34,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-04 21:12:34,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283853111] [2021-06-04 21:12:34,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:12:34,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:34,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:12:34,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:12:34,616 INFO L87 Difference]: Start difference. First operand 2932 states and 7896 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) [2021-06-04 21:12:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:34,802 INFO L93 Difference]: Finished difference Result 4167 states and 10754 transitions. [2021-06-04 21:12:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:12:34,802 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 [2021-06-04 21:12:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:34,807 INFO L225 Difference]: With dead ends: 4167 [2021-06-04 21:12:34,807 INFO L226 Difference]: Without dead ends: 4015 [2021-06-04 21:12:34,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:12:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states. [2021-06-04 21:12:34,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 2982. [2021-06-04 21:12:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 2.6856759476685674) internal successors, (8006), 2981 states have internal predecessors, (8006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 8006 transitions. [2021-06-04 21:12:34,844 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 8006 transitions. Word has length 52 [2021-06-04 21:12:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:34,844 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 8006 transitions. [2021-06-04 21:12:34,844 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) [2021-06-04 21:12:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 8006 transitions. [2021-06-04 21:12:34,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:34,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:34,847 INFO L521 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] [2021-06-04 21:12:35,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-04 21:12:35,053 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:35,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:35,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1270346633, now seen corresponding path program 2 times [2021-06-04 21:12:35,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:35,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962232211] [2021-06-04 21:12:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:35,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:35,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962232211] [2021-06-04 21:12:35,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962232211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:35,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89260294] [2021-06-04 21:12:35,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:35,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:12:35,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:35,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:35,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:35,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89260294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:35,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:35,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-04 21:12:35,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894706799] [2021-06-04 21:12:35,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:12:35,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:35,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:12:35,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:12:35,325 INFO L87 Difference]: Start difference. First operand 2982 states and 8006 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) [2021-06-04 21:12:35,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:35,512 INFO L93 Difference]: Finished difference Result 4007 states and 10434 transitions. [2021-06-04 21:12:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:12:35,513 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 [2021-06-04 21:12:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:35,518 INFO L225 Difference]: With dead ends: 4007 [2021-06-04 21:12:35,518 INFO L226 Difference]: Without dead ends: 3855 [2021-06-04 21:12:35,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:12:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-06-04 21:12:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 2981. [2021-06-04 21:12:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2980 states have (on average 2.684228187919463) internal successors, (7999), 2980 states have internal predecessors, (7999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:35,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 7999 transitions. [2021-06-04 21:12:35,576 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 7999 transitions. Word has length 52 [2021-06-04 21:12:35,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:35,576 INFO L482 AbstractCegarLoop]: Abstraction has 2981 states and 7999 transitions. [2021-06-04 21:12:35,576 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) [2021-06-04 21:12:35,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 7999 transitions. [2021-06-04 21:12:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:35,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:35,583 INFO L521 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] [2021-06-04 21:12:35,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-04 21:12:35,799 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:35,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:35,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1887847499, now seen corresponding path program 8 times [2021-06-04 21:12:35,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:35,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916248345] [2021-06-04 21:12:35,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:35,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:35,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916248345] [2021-06-04 21:12:35,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916248345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:35,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028718031] [2021-06-04 21:12:35,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:35,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:12:35,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:35,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:35,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:36,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028718031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:36,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:36,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-04 21:12:36,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241311051] [2021-06-04 21:12:36,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:12:36,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:36,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:12:36,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:12:36,054 INFO L87 Difference]: Start difference. First operand 2981 states and 7999 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) [2021-06-04 21:12:36,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:36,311 INFO L93 Difference]: Finished difference Result 4796 states and 12155 transitions. [2021-06-04 21:12:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:12:36,312 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 [2021-06-04 21:12:36,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:36,317 INFO L225 Difference]: With dead ends: 4796 [2021-06-04 21:12:36,317 INFO L226 Difference]: Without dead ends: 4404 [2021-06-04 21:12:36,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:12:36,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-06-04 21:12:36,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 2956. [2021-06-04 21:12:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.688324873096447) internal successors, (7944), 2955 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7944 transitions. [2021-06-04 21:12:36,355 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7944 transitions. Word has length 52 [2021-06-04 21:12:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:36,355 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 7944 transitions. [2021-06-04 21:12:36,355 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) [2021-06-04 21:12:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7944 transitions. [2021-06-04 21:12:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:36,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:36,358 INFO L521 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] [2021-06-04 21:12:36,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:36,568 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:36,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:36,569 INFO L82 PathProgramCache]: Analyzing trace with hash -275953247, now seen corresponding path program 9 times [2021-06-04 21:12:36,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:36,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661005203] [2021-06-04 21:12:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:36,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:36,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661005203] [2021-06-04 21:12:36,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661005203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:36,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557786001] [2021-06-04 21:12:36,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:36,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-04 21:12:36,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:36,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:36,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:36,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557786001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:36,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:36,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-04 21:12:36,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878576580] [2021-06-04 21:12:36,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:12:36,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:36,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:12:36,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:12:36,820 INFO L87 Difference]: Start difference. First operand 2956 states and 7944 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) [2021-06-04 21:12:37,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:37,142 INFO L93 Difference]: Finished difference Result 5543 states and 14338 transitions. [2021-06-04 21:12:37,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:12:37,143 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 [2021-06-04 21:12:37,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:37,148 INFO L225 Difference]: With dead ends: 5543 [2021-06-04 21:12:37,148 INFO L226 Difference]: Without dead ends: 5063 [2021-06-04 21:12:37,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:12:37,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2021-06-04 21:12:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 3250. [2021-06-04 21:12:37,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3250 states, 3249 states have (on average 2.7331486611265006) internal successors, (8880), 3249 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3250 states to 3250 states and 8880 transitions. [2021-06-04 21:12:37,195 INFO L78 Accepts]: Start accepts. Automaton has 3250 states and 8880 transitions. Word has length 52 [2021-06-04 21:12:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:37,196 INFO L482 AbstractCegarLoop]: Abstraction has 3250 states and 8880 transitions. [2021-06-04 21:12:37,196 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) [2021-06-04 21:12:37,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3250 states and 8880 transitions. [2021-06-04 21:12:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:37,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:37,199 INFO L521 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] [2021-06-04 21:12:37,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-04 21:12:37,417 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:37,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:37,417 INFO L82 PathProgramCache]: Analyzing trace with hash 179571207, now seen corresponding path program 10 times [2021-06-04 21:12:37,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:37,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67817430] [2021-06-04 21:12:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:37,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:37,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67817430] [2021-06-04 21:12:37,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67817430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:37,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471241692] [2021-06-04 21:12:37,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:37,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:12:37,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:37,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:37,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:37,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471241692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:37,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:37,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-04 21:12:37,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600545202] [2021-06-04 21:12:37,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:12:37,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:37,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:12:37,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:12:37,649 INFO L87 Difference]: Start difference. First operand 3250 states and 8880 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) [2021-06-04 21:12:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:38,149 INFO L93 Difference]: Finished difference Result 6220 states and 16674 transitions. [2021-06-04 21:12:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:12:38,150 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 [2021-06-04 21:12:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:38,155 INFO L225 Difference]: With dead ends: 6220 [2021-06-04 21:12:38,155 INFO L226 Difference]: Without dead ends: 5544 [2021-06-04 21:12:38,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 433.6ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:12:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5544 states. [2021-06-04 21:12:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5544 to 3235. [2021-06-04 21:12:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3234 states have (on average 2.7680890538033394) internal successors, (8952), 3234 states have internal predecessors, (8952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 8952 transitions. [2021-06-04 21:12:38,225 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 8952 transitions. Word has length 52 [2021-06-04 21:12:38,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:38,225 INFO L482 AbstractCegarLoop]: Abstraction has 3235 states and 8952 transitions. [2021-06-04 21:12:38,225 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) [2021-06-04 21:12:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 8952 transitions. [2021-06-04 21:12:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:38,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:38,228 INFO L521 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] [2021-06-04 21:12:38,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:38,445 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:38,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:38,445 INFO L82 PathProgramCache]: Analyzing trace with hash -97531933, now seen corresponding path program 3 times [2021-06-04 21:12:38,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:38,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818884865] [2021-06-04 21:12:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:38,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:38,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818884865] [2021-06-04 21:12:38,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818884865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:38,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346838054] [2021-06-04 21:12:38,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:38,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-04 21:12:38,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:38,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:38,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:38,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346838054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:38,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:38,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-04 21:12:38,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924119247] [2021-06-04 21:12:38,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:12:38,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:38,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:12:38,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:12:38,691 INFO L87 Difference]: Start difference. First operand 3235 states and 8952 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) [2021-06-04 21:12:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:38,985 INFO L93 Difference]: Finished difference Result 5134 states and 13421 transitions. [2021-06-04 21:12:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:12:38,986 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 [2021-06-04 21:12:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:38,991 INFO L225 Difference]: With dead ends: 5134 [2021-06-04 21:12:38,991 INFO L226 Difference]: Without dead ends: 4982 [2021-06-04 21:12:38,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:12:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2021-06-04 21:12:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 3275. [2021-06-04 21:12:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 3274 states have (on average 2.775809407452657) internal successors, (9088), 3274 states have internal predecessors, (9088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:39,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 9088 transitions. [2021-06-04 21:12:39,035 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 9088 transitions. Word has length 52 [2021-06-04 21:12:39,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:39,035 INFO L482 AbstractCegarLoop]: Abstraction has 3275 states and 9088 transitions. [2021-06-04 21:12:39,035 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) [2021-06-04 21:12:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 9088 transitions. [2021-06-04 21:12:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:39,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:39,038 INFO L521 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] [2021-06-04 21:12:39,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-04 21:12:39,250 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:39,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:39,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1811410767, now seen corresponding path program 4 times [2021-06-04 21:12:39,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:39,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687256085] [2021-06-04 21:12:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:39,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:39,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687256085] [2021-06-04 21:12:39,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687256085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:39,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691195143] [2021-06-04 21:12:39,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:39,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:12:39,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:39,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:39,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:39,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691195143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:39,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:39,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-04 21:12:39,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513431297] [2021-06-04 21:12:39,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:12:39,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:39,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:12:39,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:12:39,520 INFO L87 Difference]: Start difference. First operand 3275 states and 9088 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) [2021-06-04 21:12:39,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:39,806 INFO L93 Difference]: Finished difference Result 5358 states and 14344 transitions. [2021-06-04 21:12:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:12:39,807 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 [2021-06-04 21:12:39,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:39,812 INFO L225 Difference]: With dead ends: 5358 [2021-06-04 21:12:39,813 INFO L226 Difference]: Without dead ends: 5206 [2021-06-04 21:12:39,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:12:39,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2021-06-04 21:12:39,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 3363. [2021-06-04 21:12:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 2.796252230814991) internal successors, (9401), 3362 states have internal predecessors, (9401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:39,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 9401 transitions. [2021-06-04 21:12:39,862 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 9401 transitions. Word has length 52 [2021-06-04 21:12:39,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:39,862 INFO L482 AbstractCegarLoop]: Abstraction has 3363 states and 9401 transitions. [2021-06-04 21:12:39,862 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) [2021-06-04 21:12:39,862 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 9401 transitions. [2021-06-04 21:12:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:39,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:39,866 INFO L521 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] [2021-06-04 21:12:40,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:40,084 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:40,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:40,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1680986989, now seen corresponding path program 5 times [2021-06-04 21:12:40,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:40,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678102543] [2021-06-04 21:12:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:40,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:40,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678102543] [2021-06-04 21:12:40,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678102543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:40,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590274069] [2021-06-04 21:12:40,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:40,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-04 21:12:40,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:40,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:40,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:40,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590274069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:40,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:40,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-04 21:12:40,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260651383] [2021-06-04 21:12:40,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:12:40,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:40,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:12:40,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:12:40,336 INFO L87 Difference]: Start difference. First operand 3363 states and 9401 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:40,866 INFO L93 Difference]: Finished difference Result 6683 states and 18179 transitions. [2021-06-04 21:12:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:12:40,867 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 [2021-06-04 21:12:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:40,874 INFO L225 Difference]: With dead ends: 6683 [2021-06-04 21:12:40,874 INFO L226 Difference]: Without dead ends: 6253 [2021-06-04 21:12:40,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 464.9ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:12:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2021-06-04 21:12:40,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 3417. [2021-06-04 21:12:40,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 2.768735362997658) internal successors, (9458), 3416 states have internal predecessors, (9458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 9458 transitions. [2021-06-04 21:12:40,935 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 9458 transitions. Word has length 52 [2021-06-04 21:12:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:40,935 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 9458 transitions. [2021-06-04 21:12:40,935 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) [2021-06-04 21:12:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 9458 transitions. [2021-06-04 21:12:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:40,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:40,939 INFO L521 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] [2021-06-04 21:12:41,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-04 21:12:41,154 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:41,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:41,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1005538624, now seen corresponding path program 11 times [2021-06-04 21:12:41,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:41,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063814586] [2021-06-04 21:12:41,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:41,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:41,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063814586] [2021-06-04 21:12:41,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063814586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:41,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628736333] [2021-06-04 21:12:41,226 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 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 [2021-06-04 21:12:41,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-04 21:12:41,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:41,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:41,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:41,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628736333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:41,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:41,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-04 21:12:41,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644818888] [2021-06-04 21:12:41,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:12:41,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:41,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:12:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:12:41,419 INFO L87 Difference]: Start difference. First operand 3417 states and 9458 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) [2021-06-04 21:12:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:41,548 INFO L93 Difference]: Finished difference Result 4779 states and 12701 transitions. [2021-06-04 21:12:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-04 21:12:41,548 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 [2021-06-04 21:12:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:41,553 INFO L225 Difference]: With dead ends: 4779 [2021-06-04 21:12:41,553 INFO L226 Difference]: Without dead ends: 4627 [2021-06-04 21:12:41,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:12:41,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-06-04 21:12:41,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3492. [2021-06-04 21:12:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.75651675737611) internal successors, (9623), 3491 states have internal predecessors, (9623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9623 transitions. [2021-06-04 21:12:41,591 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9623 transitions. Word has length 57 [2021-06-04 21:12:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:41,591 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 9623 transitions. [2021-06-04 21:12:41,591 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) [2021-06-04 21:12:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9623 transitions. [2021-06-04 21:12:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:41,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:41,596 INFO L521 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] [2021-06-04 21:12:41,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-04 21:12:41,800 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash 845130068, now seen corresponding path program 12 times [2021-06-04 21:12:41,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:41,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779815620] [2021-06-04 21:12:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:41,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:41,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779815620] [2021-06-04 21:12:41,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779815620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:41,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145121311] [2021-06-04 21:12:41,872 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 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 [2021-06-04 21:12:41,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-04 21:12:41,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:41,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:41,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:42,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145121311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:42,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:42,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-04 21:12:42,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915025601] [2021-06-04 21:12:42,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:12:42,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:42,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:12:42,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:12:42,104 INFO L87 Difference]: Start difference. First operand 3492 states and 9623 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) [2021-06-04 21:12:42,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:42,300 INFO L93 Difference]: Finished difference Result 4955 states and 13053 transitions. [2021-06-04 21:12:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:12:42,300 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 [2021-06-04 21:12:42,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:42,305 INFO L225 Difference]: With dead ends: 4955 [2021-06-04 21:12:42,305 INFO L226 Difference]: Without dead ends: 4803 [2021-06-04 21:12:42,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:12:42,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-06-04 21:12:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 3492. [2021-06-04 21:12:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.75651675737611) internal successors, (9623), 3491 states have internal predecessors, (9623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9623 transitions. [2021-06-04 21:12:42,344 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9623 transitions. Word has length 57 [2021-06-04 21:12:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:42,344 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 9623 transitions. [2021-06-04 21:12:42,344 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) [2021-06-04 21:12:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9623 transitions. [2021-06-04 21:12:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:42,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:42,348 INFO L521 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] [2021-06-04 21:12:42,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-04 21:12:42,552 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:42,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1016003256, now seen corresponding path program 6 times [2021-06-04 21:12:42,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:42,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775856945] [2021-06-04 21:12:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:42,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:42,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775856945] [2021-06-04 21:12:42,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775856945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:42,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818352688] [2021-06-04 21:12:42,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:42,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-04 21:12:42,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:42,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:42,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:42,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818352688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:42,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:42,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:42,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331400473] [2021-06-04 21:12:42,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:42,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:42,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:42,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:42,859 INFO L87 Difference]: Start difference. First operand 3492 states and 9623 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) [2021-06-04 21:12:43,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:43,121 INFO L93 Difference]: Finished difference Result 5339 states and 13949 transitions. [2021-06-04 21:12:43,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:12:43,121 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 [2021-06-04 21:12:43,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:43,126 INFO L225 Difference]: With dead ends: 5339 [2021-06-04 21:12:43,126 INFO L226 Difference]: Without dead ends: 4947 [2021-06-04 21:12:43,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 288.4ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:12:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4947 states. [2021-06-04 21:12:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4947 to 3582. [2021-06-04 21:12:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 3581 states have (on average 2.7402960067020383) internal successors, (9813), 3581 states have internal predecessors, (9813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:43,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 9813 transitions. [2021-06-04 21:12:43,164 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 9813 transitions. Word has length 57 [2021-06-04 21:12:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:43,164 INFO L482 AbstractCegarLoop]: Abstraction has 3582 states and 9813 transitions. [2021-06-04 21:12:43,164 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) [2021-06-04 21:12:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 9813 transitions. [2021-06-04 21:12:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:43,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:43,168 INFO L521 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] [2021-06-04 21:12:43,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-04 21:12:43,370 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:43,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:43,370 INFO L82 PathProgramCache]: Analyzing trace with hash -542675038, now seen corresponding path program 7 times [2021-06-04 21:12:43,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:43,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635645723] [2021-06-04 21:12:43,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:43,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:43,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635645723] [2021-06-04 21:12:43,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635645723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:43,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169072776] [2021-06-04 21:12:43,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:43,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:43,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:43,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169072776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:43,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:43,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:43,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076986541] [2021-06-04 21:12:43,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:43,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:43,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:43,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:43,692 INFO L87 Difference]: Start difference. First operand 3582 states and 9813 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) [2021-06-04 21:12:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:43,895 INFO L93 Difference]: Finished difference Result 4949 states and 13043 transitions. [2021-06-04 21:12:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:12:43,895 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 [2021-06-04 21:12:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:43,900 INFO L225 Difference]: With dead ends: 4949 [2021-06-04 21:12:43,900 INFO L226 Difference]: Without dead ends: 4797 [2021-06-04 21:12:43,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:12:43,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-06-04 21:12:43,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3547. [2021-06-04 21:12:43,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3546 states have (on average 2.745628877608573) internal successors, (9736), 3546 states have internal predecessors, (9736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:43,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 9736 transitions. [2021-06-04 21:12:43,939 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 9736 transitions. Word has length 57 [2021-06-04 21:12:43,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:43,939 INFO L482 AbstractCegarLoop]: Abstraction has 3547 states and 9736 transitions. [2021-06-04 21:12:43,939 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) [2021-06-04 21:12:43,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 9736 transitions. [2021-06-04 21:12:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:43,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:43,942 INFO L521 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] [2021-06-04 21:12:44,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:44,158 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash 509542868, now seen corresponding path program 8 times [2021-06-04 21:12:44,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:44,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979683592] [2021-06-04 21:12:44,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:44,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:44,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979683592] [2021-06-04 21:12:44,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979683592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:44,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154287058] [2021-06-04 21:12:44,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:44,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:12:44,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:44,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:44,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154287058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:44,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:44,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:44,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236833029] [2021-06-04 21:12:44,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:44,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:44,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:44,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:44,454 INFO L87 Difference]: Start difference. First operand 3547 states and 9736 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) [2021-06-04 21:12:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:44,704 INFO L93 Difference]: Finished difference Result 5131 states and 13405 transitions. [2021-06-04 21:12:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:12:44,705 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 [2021-06-04 21:12:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:44,709 INFO L225 Difference]: With dead ends: 5131 [2021-06-04 21:12:44,709 INFO L226 Difference]: Without dead ends: 4979 [2021-06-04 21:12:44,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 275.0ms TimeCoverageRelationStatistics Valid=256, Invalid=736, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:12:44,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4979 states. [2021-06-04 21:12:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4979 to 3652. [2021-06-04 21:12:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3652 states, 3651 states have (on average 2.7299370035606683) internal successors, (9967), 3651 states have internal predecessors, (9967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3652 states to 3652 states and 9967 transitions. [2021-06-04 21:12:44,749 INFO L78 Accepts]: Start accepts. Automaton has 3652 states and 9967 transitions. Word has length 57 [2021-06-04 21:12:44,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:44,749 INFO L482 AbstractCegarLoop]: Abstraction has 3652 states and 9967 transitions. [2021-06-04 21:12:44,750 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) [2021-06-04 21:12:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3652 states and 9967 transitions. [2021-06-04 21:12:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:44,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:44,753 INFO L521 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] [2021-06-04 21:12:44,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-04 21:12:44,969 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:44,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:44,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1535792180, now seen corresponding path program 9 times [2021-06-04 21:12:44,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:44,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256695345] [2021-06-04 21:12:44,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:45,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:45,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256695345] [2021-06-04 21:12:45,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256695345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:45,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204987987] [2021-06-04 21:12:45,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:45,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-04 21:12:45,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:45,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:45,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:45,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204987987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:45,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:45,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:45,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309253712] [2021-06-04 21:12:45,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:45,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:45,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:45,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:45,287 INFO L87 Difference]: Start difference. First operand 3652 states and 9967 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) [2021-06-04 21:12:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:45,612 INFO L93 Difference]: Finished difference Result 5235 states and 13613 transitions. [2021-06-04 21:12:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:12:45,612 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 [2021-06-04 21:12:45,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:45,617 INFO L225 Difference]: With dead ends: 5235 [2021-06-04 21:12:45,617 INFO L226 Difference]: Without dead ends: 5083 [2021-06-04 21:12:45,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:12:45,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2021-06-04 21:12:45,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 3636. [2021-06-04 21:12:45,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.730123796423659) internal successors, (9924), 3635 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 9924 transitions. [2021-06-04 21:12:45,656 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 9924 transitions. Word has length 57 [2021-06-04 21:12:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:45,656 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 9924 transitions. [2021-06-04 21:12:45,656 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) [2021-06-04 21:12:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 9924 transitions. [2021-06-04 21:12:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:45,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:45,660 INFO L521 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] [2021-06-04 21:12:45,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-04 21:12:45,866 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:45,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:45,867 INFO L82 PathProgramCache]: Analyzing trace with hash -723248218, now seen corresponding path program 10 times [2021-06-04 21:12:45,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:45,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974034660] [2021-06-04 21:12:45,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:45,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:45,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974034660] [2021-06-04 21:12:45,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974034660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:45,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517010881] [2021-06-04 21:12:45,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:45,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:12:45,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:45,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:45,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:46,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517010881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:46,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:46,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:46,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717667741] [2021-06-04 21:12:46,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:46,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:46,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:46,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:46,144 INFO L87 Difference]: Start difference. First operand 3636 states and 9924 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) [2021-06-04 21:12:46,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:46,465 INFO L93 Difference]: Finished difference Result 5219 states and 13581 transitions. [2021-06-04 21:12:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:12:46,465 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 [2021-06-04 21:12:46,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:46,470 INFO L225 Difference]: With dead ends: 5219 [2021-06-04 21:12:46,470 INFO L226 Difference]: Without dead ends: 5067 [2021-06-04 21:12:46,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 298.6ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:12:46,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2021-06-04 21:12:46,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 3581. [2021-06-04 21:12:46,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 2.7391061452513967) internal successors, (9806), 3580 states have internal predecessors, (9806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 9806 transitions. [2021-06-04 21:12:46,509 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 9806 transitions. Word has length 57 [2021-06-04 21:12:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:46,509 INFO L482 AbstractCegarLoop]: Abstraction has 3581 states and 9806 transitions. [2021-06-04 21:12:46,509 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) [2021-06-04 21:12:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 9806 transitions. [2021-06-04 21:12:46,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:46,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:46,512 INFO L521 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] [2021-06-04 21:12:46,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:46,712 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:46,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:46,713 INFO L82 PathProgramCache]: Analyzing trace with hash 891212980, now seen corresponding path program 13 times [2021-06-04 21:12:46,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:46,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732319856] [2021-06-04 21:12:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:46,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:46,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732319856] [2021-06-04 21:12:46,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732319856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:46,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047234301] [2021-06-04 21:12:46,781 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 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 [2021-06-04 21:12:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:46,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:46,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:46,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047234301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:46,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:46,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-04 21:12:46,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449028999] [2021-06-04 21:12:46,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:12:46,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:46,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:12:46,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:12:46,957 INFO L87 Difference]: Start difference. First operand 3581 states and 9806 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) [2021-06-04 21:12:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:47,111 INFO L93 Difference]: Finished difference Result 5043 states and 13229 transitions. [2021-06-04 21:12:47,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-04 21:12:47,111 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 [2021-06-04 21:12:47,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:47,115 INFO L225 Difference]: With dead ends: 5043 [2021-06-04 21:12:47,116 INFO L226 Difference]: Without dead ends: 4891 [2021-06-04 21:12:47,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:12:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-06-04 21:12:47,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 3556. [2021-06-04 21:12:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:47,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-06-04 21:12:47,153 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-06-04 21:12:47,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:47,153 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-06-04 21:12:47,153 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) [2021-06-04 21:12:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-06-04 21:12:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:47,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:47,156 INFO L521 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] [2021-06-04 21:12:47,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-04 21:12:47,358 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:47,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:47,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1553085624, now seen corresponding path program 14 times [2021-06-04 21:12:47,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:47,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393674186] [2021-06-04 21:12:47,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:47,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:47,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393674186] [2021-06-04 21:12:47,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393674186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:47,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300951128] [2021-06-04 21:12:47,419 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 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 [2021-06-04 21:12:47,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:12:47,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:47,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:47,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300951128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:47,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:47,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-04 21:12:47,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301776534] [2021-06-04 21:12:47,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:12:47,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:47,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:12:47,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:12:47,611 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 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) [2021-06-04 21:12:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:47,839 INFO L93 Difference]: Finished difference Result 5339 states and 13821 transitions. [2021-06-04 21:12:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:12:47,840 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 [2021-06-04 21:12:47,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:47,845 INFO L225 Difference]: With dead ends: 5339 [2021-06-04 21:12:47,845 INFO L226 Difference]: Without dead ends: 5187 [2021-06-04 21:12:47,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:12:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5187 states. [2021-06-04 21:12:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5187 to 3606. [2021-06-04 21:12:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.735367545076283) internal successors, (9861), 3605 states have internal predecessors, (9861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9861 transitions. [2021-06-04 21:12:47,885 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9861 transitions. Word has length 57 [2021-06-04 21:12:47,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:47,885 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9861 transitions. [2021-06-04 21:12:47,885 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) [2021-06-04 21:12:47,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9861 transitions. [2021-06-04 21:12:47,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:47,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:47,888 INFO L521 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] [2021-06-04 21:12:48,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:48,104 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:48,104 INFO L82 PathProgramCache]: Analyzing trace with hash 880748348, now seen corresponding path program 11 times [2021-06-04 21:12:48,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:48,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954213148] [2021-06-04 21:12:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:48,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:48,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954213148] [2021-06-04 21:12:48,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954213148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:48,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322333870] [2021-06-04 21:12:48,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:48,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-04 21:12:48,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:48,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:48,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:48,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322333870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:48,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:48,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:48,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938544723] [2021-06-04 21:12:48,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:48,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:48,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:48,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:48,409 INFO L87 Difference]: Start difference. First operand 3606 states and 9861 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) [2021-06-04 21:12:48,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:48,721 INFO L93 Difference]: Finished difference Result 5859 states and 14989 transitions. [2021-06-04 21:12:48,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:12:48,722 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 [2021-06-04 21:12:48,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:48,727 INFO L225 Difference]: With dead ends: 5859 [2021-06-04 21:12:48,727 INFO L226 Difference]: Without dead ends: 5467 [2021-06-04 21:12:48,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:12:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5467 states. [2021-06-04 21:12:48,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5467 to 3631. [2021-06-04 21:12:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3630 states have (on average 2.73168044077135) internal successors, (9916), 3630 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:48,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 9916 transitions. [2021-06-04 21:12:48,765 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 9916 transitions. Word has length 57 [2021-06-04 21:12:48,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:48,765 INFO L482 AbstractCegarLoop]: Abstraction has 3631 states and 9916 transitions. [2021-06-04 21:12:48,766 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) [2021-06-04 21:12:48,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 9916 transitions. [2021-06-04 21:12:48,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:48,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:48,768 INFO L521 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] [2021-06-04 21:12:48,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-04 21:12:48,984 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:48,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:48,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1354076566, now seen corresponding path program 12 times [2021-06-04 21:12:48,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:48,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237959478] [2021-06-04 21:12:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:49,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:49,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237959478] [2021-06-04 21:12:49,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237959478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:49,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691367310] [2021-06-04 21:12:49,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:49,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-04 21:12:49,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:49,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:49,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691367310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:49,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:49,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:49,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340754056] [2021-06-04 21:12:49,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:49,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:49,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:49,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:49,281 INFO L87 Difference]: Start difference. First operand 3631 states and 9916 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) [2021-06-04 21:12:49,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:49,516 INFO L93 Difference]: Finished difference Result 5219 states and 13581 transitions. [2021-06-04 21:12:49,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:12:49,517 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 [2021-06-04 21:12:49,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:49,522 INFO L225 Difference]: With dead ends: 5219 [2021-06-04 21:12:49,522 INFO L226 Difference]: Without dead ends: 5067 [2021-06-04 21:12:49,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:12:49,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2021-06-04 21:12:49,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 3556. [2021-06-04 21:12:49,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-06-04 21:12:49,562 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-06-04 21:12:49,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:49,562 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-06-04 21:12:49,562 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) [2021-06-04 21:12:49,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-06-04 21:12:49,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:49,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:49,564 INFO L521 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] [2021-06-04 21:12:49,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-04 21:12:49,780 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:49,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:49,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1028549134, now seen corresponding path program 15 times [2021-06-04 21:12:49,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:49,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926827006] [2021-06-04 21:12:49,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:49,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:49,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926827006] [2021-06-04 21:12:49,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926827006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:49,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046941652] [2021-06-04 21:12:49,846 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:49,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-04 21:12:49,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:49,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:49,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:50,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046941652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:50,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:50,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-04 21:12:50,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733089057] [2021-06-04 21:12:50,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:12:50,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:50,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:12:50,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:12:50,038 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 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) [2021-06-04 21:12:50,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:50,197 INFO L93 Difference]: Finished difference Result 5128 states and 13414 transitions. [2021-06-04 21:12:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:12:50,197 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 [2021-06-04 21:12:50,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:50,201 INFO L225 Difference]: With dead ends: 5128 [2021-06-04 21:12:50,201 INFO L226 Difference]: Without dead ends: 4976 [2021-06-04 21:12:50,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:12:50,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-04 21:12:50,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 3531. [2021-06-04 21:12:50,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.746742209631728) internal successors, (9696), 3530 states have internal predecessors, (9696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:50,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9696 transitions. [2021-06-04 21:12:50,237 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9696 transitions. Word has length 57 [2021-06-04 21:12:50,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:50,237 INFO L482 AbstractCegarLoop]: Abstraction has 3531 states and 9696 transitions. [2021-06-04 21:12:50,237 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) [2021-06-04 21:12:50,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9696 transitions. [2021-06-04 21:12:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:50,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:50,239 INFO L521 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] [2021-06-04 21:12:50,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-04 21:12:50,444 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:50,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:50,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1415749470, now seen corresponding path program 16 times [2021-06-04 21:12:50,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:50,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830476549] [2021-06-04 21:12:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:50,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:50,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830476549] [2021-06-04 21:12:50,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830476549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:50,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178035167] [2021-06-04 21:12:50,501 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:50,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:12:50,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:50,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:50,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:50,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178035167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:50,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:50,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-04 21:12:50,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951844519] [2021-06-04 21:12:50,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:12:50,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:50,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:12:50,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:12:50,744 INFO L87 Difference]: Start difference. First operand 3531 states and 9696 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) [2021-06-04 21:12:50,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:50,995 INFO L93 Difference]: Finished difference Result 5384 states and 13926 transitions. [2021-06-04 21:12:50,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:12:50,996 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 [2021-06-04 21:12:50,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:51,001 INFO L225 Difference]: With dead ends: 5384 [2021-06-04 21:12:51,001 INFO L226 Difference]: Without dead ends: 5232 [2021-06-04 21:12:51,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 259.8ms TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:12:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5232 states. [2021-06-04 21:12:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5232 to 3556. [2021-06-04 21:12:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-06-04 21:12:51,042 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-06-04 21:12:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:51,043 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-06-04 21:12:51,043 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) [2021-06-04 21:12:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-06-04 21:12:51,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:51,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:51,045 INFO L521 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] [2021-06-04 21:12:51,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:51,249 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:51,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:51,249 INFO L82 PathProgramCache]: Analyzing trace with hash 955868276, now seen corresponding path program 17 times [2021-06-04 21:12:51,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:51,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482752321] [2021-06-04 21:12:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:51,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:51,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482752321] [2021-06-04 21:12:51,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482752321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:51,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251668359] [2021-06-04 21:12:51,312 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:51,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-04 21:12:51,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:51,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:51,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:51,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251668359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:51,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:51,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-04 21:12:51,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686661448] [2021-06-04 21:12:51,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:12:51,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:51,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:12:51,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:12:51,505 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 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) [2021-06-04 21:12:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:51,686 INFO L93 Difference]: Finished difference Result 5113 states and 13389 transitions. [2021-06-04 21:12:51,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:12:51,687 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 [2021-06-04 21:12:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:51,691 INFO L225 Difference]: With dead ends: 5113 [2021-06-04 21:12:51,691 INFO L226 Difference]: Without dead ends: 4961 [2021-06-04 21:12:51,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:12:51,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-04 21:12:51,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3531. [2021-06-04 21:12:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.746742209631728) internal successors, (9696), 3530 states have internal predecessors, (9696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9696 transitions. [2021-06-04 21:12:51,728 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9696 transitions. Word has length 57 [2021-06-04 21:12:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:51,728 INFO L482 AbstractCegarLoop]: Abstraction has 3531 states and 9696 transitions. [2021-06-04 21:12:51,728 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) [2021-06-04 21:12:51,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9696 transitions. [2021-06-04 21:12:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:51,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:51,730 INFO L521 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] [2021-06-04 21:12:51,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-04 21:12:51,931 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:51,931 INFO L82 PathProgramCache]: Analyzing trace with hash -884485368, now seen corresponding path program 18 times [2021-06-04 21:12:51,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:51,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3064303] [2021-06-04 21:12:51,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:51,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:51,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3064303] [2021-06-04 21:12:51,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3064303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:51,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363042951] [2021-06-04 21:12:51,999 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:52,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-04 21:12:52,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:52,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:12:52,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:52,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363042951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:52,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:52,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:52,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649472100] [2021-06-04 21:12:52,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:52,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:52,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:52,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:52,531 INFO L87 Difference]: Start difference. First operand 3531 states and 9696 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) [2021-06-04 21:12:53,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:53,025 INFO L93 Difference]: Finished difference Result 7762 states and 20463 transitions. [2021-06-04 21:12:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:12:53,025 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 [2021-06-04 21:12:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:53,032 INFO L225 Difference]: With dead ends: 7762 [2021-06-04 21:12:53,032 INFO L226 Difference]: Without dead ends: 7052 [2021-06-04 21:12:53,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 659.8ms TimeCoverageRelationStatistics Valid=424, Invalid=1468, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:12:53,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7052 states. [2021-06-04 21:12:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7052 to 3809. [2021-06-04 21:12:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3809 states, 3808 states have (on average 2.7547268907563027) internal successors, (10490), 3808 states have internal predecessors, (10490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3809 states to 3809 states and 10490 transitions. [2021-06-04 21:12:53,081 INFO L78 Accepts]: Start accepts. Automaton has 3809 states and 10490 transitions. Word has length 57 [2021-06-04 21:12:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:53,081 INFO L482 AbstractCegarLoop]: Abstraction has 3809 states and 10490 transitions. [2021-06-04 21:12:53,081 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) [2021-06-04 21:12:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3809 states and 10490 transitions. [2021-06-04 21:12:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:53,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:53,084 INFO L521 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] [2021-06-04 21:12:53,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:53,288 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash 613988712, now seen corresponding path program 13 times [2021-06-04 21:12:53,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:53,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352960042] [2021-06-04 21:12:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:53,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:53,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352960042] [2021-06-04 21:12:53,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352960042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:53,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188471327] [2021-06-04 21:12:53,349 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:53,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:53,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:53,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188471327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:53,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:53,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:53,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704067078] [2021-06-04 21:12:53,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:53,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:53,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:53,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:53,587 INFO L87 Difference]: Start difference. First operand 3809 states and 10490 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) [2021-06-04 21:12:53,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:53,836 INFO L93 Difference]: Finished difference Result 5498 states and 14449 transitions. [2021-06-04 21:12:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:12:53,836 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 [2021-06-04 21:12:53,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:53,841 INFO L225 Difference]: With dead ends: 5498 [2021-06-04 21:12:53,841 INFO L226 Difference]: Without dead ends: 5346 [2021-06-04 21:12:53,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:12:53,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2021-06-04 21:12:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 3884. [2021-06-04 21:12:53,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3884 states, 3883 states have (on average 2.7671903167653875) internal successors, (10745), 3883 states have internal predecessors, (10745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:53,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 10745 transitions. [2021-06-04 21:12:53,897 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 10745 transitions. Word has length 57 [2021-06-04 21:12:53,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:53,897 INFO L482 AbstractCegarLoop]: Abstraction has 3884 states and 10745 transitions. [2021-06-04 21:12:53,897 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) [2021-06-04 21:12:53,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 10745 transitions. [2021-06-04 21:12:53,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:53,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:53,900 INFO L521 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] [2021-06-04 21:12:54,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:54,109 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:54,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:54,109 INFO L82 PathProgramCache]: Analyzing trace with hash -48566186, now seen corresponding path program 14 times [2021-06-04 21:12:54,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:54,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266003334] [2021-06-04 21:12:54,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:54,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:54,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266003334] [2021-06-04 21:12:54,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266003334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:54,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433440857] [2021-06-04 21:12:54,186 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:54,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:12:54,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:54,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:54,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-04 21:27:07,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-04 21:27:07,947 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-04 21:27:07,948 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-04 21:27:07,949 WARN L196 ceAbstractionStarter]: Timeout [2021-06-04 21:27:07,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.06 09:27:07 BasicIcfg [2021-06-04 21:27:07,949 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-04 21:27:07,950 INFO L168 Benchmark]: Toolchain (without parser) took 882186.53 ms. Allocated memory was 358.6 MB in the beginning and 1.7 GB in the end (delta: 1.3 GB). Free memory was 322.1 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. [2021-06-04 21:27:07,950 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 358.6 MB. Free memory is still 340.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-04 21:27:07,950 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.50 ms. Allocated memory is still 358.6 MB. Free memory was 322.0 MB in the beginning and 323.3 MB in the end (delta: -1.4 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.0 GB. [2021-06-04 21:27:07,950 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.05 ms. Allocated memory is still 358.6 MB. Free memory was 323.3 MB in the beginning and 321.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-04 21:27:07,950 INFO L168 Benchmark]: Boogie Preprocessor took 24.56 ms. Allocated memory is still 358.6 MB. Free memory was 321.2 MB in the beginning and 320.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-04 21:27:07,950 INFO L168 Benchmark]: RCFGBuilder took 398.38 ms. Allocated memory is still 358.6 MB. Free memory was 320.2 MB in the beginning and 297.1 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-06-04 21:27:07,950 INFO L168 Benchmark]: TraceAbstraction took 881308.58 ms. Allocated memory was 358.6 MB in the beginning and 1.7 GB in the end (delta: 1.3 GB). Free memory was 297.1 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. [2021-06-04 21:27:07,950 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 358.6 MB. Free memory is still 340.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 372.50 ms. Allocated memory is still 358.6 MB. Free memory was 322.0 MB in the beginning and 323.3 MB in the end (delta: -1.4 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 41.05 ms. Allocated memory is still 358.6 MB. Free memory was 323.3 MB in the beginning and 321.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.56 ms. Allocated memory is still 358.6 MB. Free memory was 321.2 MB in the beginning and 320.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 398.38 ms. Allocated memory is still 358.6 MB. Free memory was 320.2 MB in the beginning and 297.1 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 881308.58 ms. Allocated memory was 358.6 MB in the beginning and 1.7 GB in the end (delta: 1.3 GB). Free memory was 297.1 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 58 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 299 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 721]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 58 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 299 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 730]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was analyzing trace of length 58 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 299 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 881223.3ms, OverallIterations: 39, TraceHistogramMax: 4, EmptinessCheckTime: 125.9ms, AutomataDifference: 9171.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 88.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3553 SDtfs, 19238 SDslu, 28079 SDs, 0 SdLazy, 4777 SolverSat, 1269 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2221.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2466 GetRequests, 1481 SyntacticMatches, 8 SemanticMatches, 977 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8020 ImplicationChecksByTransitivity, 8685.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3884occurred in iteration=38, InterpolantAutomatonStates: 821, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1620.9ms AutomataMinimizationTime, 38 MinimizatonAttempts, 51245 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 290.9ms SsaConstructionTime, 678.4ms SatisfiabilityAnalysisTime, 7569.4ms InterpolantComputationTime, 3593 NumberOfCodeBlocks, 3593 NumberOfCodeBlocksAsserted, 112 NumberOfCheckSat, 3524 ConstructedInterpolants, 0 QuantifiedInterpolants, 26046 SizeOfPredicates, 62 NumberOfNonLiveVariables, 4172 ConjunctsInSsa, 352 ConjunctsInUnsatCore, 69 InterpolantComputations, 7 PerfectInterpolantSequences, 0/648 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown