/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/concurrent/pthreads/NonAtomicIncrement_2Threads.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 01:32:17,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 01:32:17,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 01:32:17,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-15 01:32:17,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-15 01:32:17,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-15 01:32:17,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-15 01:32:17,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-15 01:32:17,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-15 01:32:17,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-15 01:32:17,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-15 01:32:17,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-15 01:32:17,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 01:32:17,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 01:32:17,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 01:32:17,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 01:32:17,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 01:32:17,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 01:32:17,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 01:32:17,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 01:32:17,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 01:32:17,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 01:32:17,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 01:32:17,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 01:32:17,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-15 01:32:17,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 01:32:17,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 01:32:17,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 01:32:17,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-04-15 01:32:17,120 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 01:32:17,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 01:32:17,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 01:32:17,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 01:32:17,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 01:32:17,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 01:32:17,122 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 01:32:17,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 01:32:17,123 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 01:32:17,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 01:32:17,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 01:32:17,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 01:32:17,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 01:32:17,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 01:32:17,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 01:32:17,124 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 01:32:17,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 01:32:17,124 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 01:32:17,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 01:32:17,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 01:32:17,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 01:32:17,125 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 01:32:17,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 01:32:17,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 01:32:17,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 01:32:17,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 01:32:17,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 01:32:17,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 01:32:17,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 01:32:17,127 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 01:32:17,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 01:32:17,127 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 01:32:17,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 01:32:17,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 01:32:17,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 01:32:17,477 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-15 01:32:17,479 INFO L275 PluginConnector]: CDTParser initialized [2021-04-15 01:32:17,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2021-04-15 01:32:17,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/881f3e272/b2ef79af739a4ee39aa3b5b285fc28dd/FLAG1a0d6a874 [2021-04-15 01:32:18,043 INFO L306 CDTParser]: Found 1 translation units. [2021-04-15 01:32:18,044 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2021-04-15 01:32:18,044 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-04-15 01:32:18,044 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2021-04-15 01:32:18,045 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2021-04-15 01:32:18,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/881f3e272/b2ef79af739a4ee39aa3b5b285fc28dd/FLAG1a0d6a874 [2021-04-15 01:32:18,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/881f3e272/b2ef79af739a4ee39aa3b5b285fc28dd [2021-04-15 01:32:18,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 01:32:18,541 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-04-15 01:32:18,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-15 01:32:18,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-15 01:32:18,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-15 01:32:18,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 01:32:18" (1/1) ... [2021-04-15 01:32:18,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f93e71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:32:18, skipping insertion in model container [2021-04-15 01:32:18,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 01:32:18" (1/1) ... [2021-04-15 01:32:18,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-15 01:32:18,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-15 01:32:18,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 01:32:18,755 INFO L203 MainTranslator]: Completed pre-run [2021-04-15 01:32:18,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 01:32:18,806 INFO L208 MainTranslator]: Completed translation [2021-04-15 01:32:18,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:32:18 WrapperNode [2021-04-15 01:32:18,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-15 01:32:18,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 01:32:18,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 01:32:18,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 01:32:18,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:32:18" (1/1) ... [2021-04-15 01:32:18,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:32:18" (1/1) ... [2021-04-15 01:32:18,836 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 01:32:18,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 01:32:18,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 01:32:18,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 01:32:18,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:32:18" (1/1) ... [2021-04-15 01:32:18,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:32:18" (1/1) ... [2021-04-15 01:32:18,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:32:18" (1/1) ... [2021-04-15 01:32:18,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:32:18" (1/1) ... [2021-04-15 01:32:18,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:32:18" (1/1) ... [2021-04-15 01:32:18,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:32:18" (1/1) ... [2021-04-15 01:32:18,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:32:18" (1/1) ... [2021-04-15 01:32:18,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 01:32:18,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 01:32:18,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 01:32:18,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 01:32:18,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:32:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 01:32:18,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-15 01:32:18,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 01:32:18,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 01:32:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-15 01:32:18,936 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2021-04-15 01:32:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2021-04-15 01:32:18,936 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2021-04-15 01:32:18,937 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2021-04-15 01:32:18,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-15 01:32:18,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-15 01:32:18,938 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 01:32:19,203 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 01:32:19,203 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-04-15 01:32:19,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 01:32:19 BoogieIcfgContainer [2021-04-15 01:32:19,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 01:32:19,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 01:32:19,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 01:32:19,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 01:32:19,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 01:32:18" (1/3) ... [2021-04-15 01:32:19,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105163bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 01:32:19, skipping insertion in model container [2021-04-15 01:32:19,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:32:18" (2/3) ... [2021-04-15 01:32:19,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105163bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 01:32:19, skipping insertion in model container [2021-04-15 01:32:19,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 01:32:19" (3/3) ... [2021-04-15 01:32:19,211 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2021-04-15 01:32:19,233 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 01:32:19,233 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 01:32:19,236 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 01:32:19,236 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 01:32:19,260 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,260 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,260 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,261 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,261 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,261 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,261 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,261 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,262 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,262 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,262 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,262 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,262 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,262 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,263 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,263 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,263 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,263 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,263 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,263 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,263 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,264 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,264 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,264 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,264 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,264 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,265 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,265 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,265 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,265 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,265 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,266 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,266 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,266 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,266 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,266 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,266 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,267 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,267 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,267 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,267 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,267 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,267 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,268 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,269 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,269 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,270 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,270 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,270 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,273 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,273 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,273 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,274 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,274 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:32:19,281 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-04-15 01:32:19,295 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 01:32:19,312 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 01:32:19,312 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 01:32:19,312 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 01:32:19,312 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 01:32:19,313 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 01:32:19,313 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 01:32:19,313 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 01:32:19,313 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 01:32:19,322 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 56 transitions, 134 flow [2021-04-15 01:32:19,350 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 412 states, 410 states have (on average 2.6146341463414635) internal successors, (1072), 411 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand has 412 states, 410 states have (on average 2.6146341463414635) internal successors, (1072), 411 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 01:32:19,368 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:19,369 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:19,369 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:19,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:19,374 INFO L82 PathProgramCache]: Analyzing trace with hash 608113638, now seen corresponding path program 1 times [2021-04-15 01:32:19,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:19,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10417702] [2021-04-15 01:32:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:32:19,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10417702] [2021-04-15 01:32:19,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 01:32:19,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 01:32:19,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351399520] [2021-04-15 01:32:19,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-04-15 01:32:19,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:19,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-04-15 01:32:19,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-04-15 01:32:19,514 INFO L87 Difference]: Start difference. First operand has 412 states, 410 states have (on average 2.6146341463414635) internal successors, (1072), 411 states have internal predecessors, (1072), 0 states have call successors, (0), 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 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:19,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:19,549 INFO L93 Difference]: Finished difference Result 412 states and 1003 transitions. [2021-04-15 01:32:19,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-04-15 01:32:19,551 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 01:32:19,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:19,570 INFO L225 Difference]: With dead ends: 412 [2021-04-15 01:32:19,571 INFO L226 Difference]: Without dead ends: 404 [2021-04-15 01:32:19,572 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-04-15 01:32:19,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-04-15 01:32:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2021-04-15 01:32:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.468982630272953) internal successors, (995), 403 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 995 transitions. [2021-04-15 01:32:19,662 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 995 transitions. Word has length 30 [2021-04-15 01:32:19,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:19,665 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 995 transitions. [2021-04-15 01:32:19,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 995 transitions. [2021-04-15 01:32:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 01:32:19,673 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:19,673 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:19,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 01:32:19,674 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:19,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:19,674 INFO L82 PathProgramCache]: Analyzing trace with hash 446981008, now seen corresponding path program 1 times [2021-04-15 01:32:19,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:19,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082486312] [2021-04-15 01:32:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:32:19,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082486312] [2021-04-15 01:32:19,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 01:32:19,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 01:32:19,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25028446] [2021-04-15 01:32:19,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 01:32:19,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:19,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 01:32:19,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 01:32:19,750 INFO L87 Difference]: Start difference. First operand 404 states and 995 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:19,772 INFO L93 Difference]: Finished difference Result 584 states and 1455 transitions. [2021-04-15 01:32:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 01:32:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 01:32:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:19,776 INFO L225 Difference]: With dead ends: 584 [2021-04-15 01:32:19,776 INFO L226 Difference]: Without dead ends: 584 [2021-04-15 01:32:19,776 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 01:32:19,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-04-15 01:32:19,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 440. [2021-04-15 01:32:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.4760820045558085) internal successors, (1087), 439 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1087 transitions. [2021-04-15 01:32:19,793 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1087 transitions. Word has length 30 [2021-04-15 01:32:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:19,794 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 1087 transitions. [2021-04-15 01:32:19,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1087 transitions. [2021-04-15 01:32:19,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 01:32:19,796 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:19,796 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:19,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 01:32:19,796 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1132558260, now seen corresponding path program 1 times [2021-04-15 01:32:19,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:19,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577796665] [2021-04-15 01:32:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:32:19,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577796665] [2021-04-15 01:32:19,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396221765] [2021-04-15 01:32:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:19,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-04-15 01:32:19,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:32:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:32:20,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 01:32:20,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-04-15 01:32:20,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772818862] [2021-04-15 01:32:20,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 01:32:20,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:20,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 01:32:20,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 01:32:20,090 INFO L87 Difference]: Start difference. First operand 440 states and 1087 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:20,120 INFO L93 Difference]: Finished difference Result 620 states and 1557 transitions. [2021-04-15 01:32:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 01:32:20,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-04-15 01:32:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:20,124 INFO L225 Difference]: With dead ends: 620 [2021-04-15 01:32:20,125 INFO L226 Difference]: Without dead ends: 620 [2021-04-15 01:32:20,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 01:32:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-04-15 01:32:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 476. [2021-04-15 01:32:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.486315789473684) internal successors, (1181), 475 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:20,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1181 transitions. [2021-04-15 01:32:20,141 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1181 transitions. Word has length 36 [2021-04-15 01:32:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:20,141 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1181 transitions. [2021-04-15 01:32:20,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:20,141 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1181 transitions. [2021-04-15 01:32:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-04-15 01:32:20,143 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:20,143 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:20,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-04-15 01:32:20,362 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:20,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:20,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1634590256, now seen corresponding path program 1 times [2021-04-15 01:32:20,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:20,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793490670] [2021-04-15 01:32:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:32:20,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793490670] [2021-04-15 01:32:20,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420120705] [2021-04-15 01:32:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:20,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 01:32:20,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:32:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:32:20,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:32:20,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-04-15 01:32:20,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869503769] [2021-04-15 01:32:20,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 01:32:20,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:20,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 01:32:20,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-04-15 01:32:20,719 INFO L87 Difference]: Start difference. First operand 476 states and 1181 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:21,111 INFO L93 Difference]: Finished difference Result 1526 states and 3921 transitions. [2021-04-15 01:32:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 01:32:21,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 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 [2021-04-15 01:32:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:21,118 INFO L225 Difference]: With dead ends: 1526 [2021-04-15 01:32:21,119 INFO L226 Difference]: Without dead ends: 1526 [2021-04-15 01:32:21,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 241.1ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-04-15 01:32:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-04-15 01:32:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1034. [2021-04-15 01:32:21,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 2.548886737657309) internal successors, (2633), 1033 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 2633 transitions. [2021-04-15 01:32:21,154 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 2633 transitions. Word has length 42 [2021-04-15 01:32:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:21,154 INFO L480 AbstractCegarLoop]: Abstraction has 1034 states and 2633 transitions. [2021-04-15 01:32:21,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 2633 transitions. [2021-04-15 01:32:21,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-04-15 01:32:21,157 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:21,158 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:21,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:21,380 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:21,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:21,381 INFO L82 PathProgramCache]: Analyzing trace with hash -578844552, now seen corresponding path program 2 times [2021-04-15 01:32:21,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:21,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118330590] [2021-04-15 01:32:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 01:32:21,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118330590] [2021-04-15 01:32:21,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532089892] [2021-04-15 01:32:21,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:21,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 01:32:21,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:32:21,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 01:32:21,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:32:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 01:32:21,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:32:21,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 01:32:21,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277824651] [2021-04-15 01:32:21,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 01:32:21,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:21,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 01:32:21,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 01:32:21,684 INFO L87 Difference]: Start difference. First operand 1034 states and 2633 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:21,775 INFO L93 Difference]: Finished difference Result 1574 states and 4053 transitions. [2021-04-15 01:32:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 01:32:21,775 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-04-15 01:32:21,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:21,784 INFO L225 Difference]: With dead ends: 1574 [2021-04-15 01:32:21,784 INFO L226 Difference]: Without dead ends: 1574 [2021-04-15 01:32:21,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-04-15 01:32:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-04-15 01:32:21,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1358. [2021-04-15 01:32:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 2.5681650700073693) internal successors, (3485), 1357 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 3485 transitions. [2021-04-15 01:32:21,823 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 3485 transitions. Word has length 54 [2021-04-15 01:32:21,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:21,823 INFO L480 AbstractCegarLoop]: Abstraction has 1358 states and 3485 transitions. [2021-04-15 01:32:21,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:21,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 3485 transitions. [2021-04-15 01:32:21,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-04-15 01:32:21,827 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:21,827 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:22,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:22,050 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:22,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:22,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1629047036, now seen corresponding path program 3 times [2021-04-15 01:32:22,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:22,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506359730] [2021-04-15 01:32:22,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 01:32:22,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506359730] [2021-04-15 01:32:22,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22292920] [2021-04-15 01:32:22,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:22,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 01:32:22,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:32:22,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 01:32:22,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:32:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-04-15 01:32:22,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:32:22,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-04-15 01:32:22,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092820430] [2021-04-15 01:32:22,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 01:32:22,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:22,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 01:32:22,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-04-15 01:32:22,418 INFO L87 Difference]: Start difference. First operand 1358 states and 3485 transitions. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:23,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:23,800 INFO L93 Difference]: Finished difference Result 2948 states and 7665 transitions. [2021-04-15 01:32:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-04-15 01:32:23,800 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 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 60 [2021-04-15 01:32:23,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:23,814 INFO L225 Difference]: With dead ends: 2948 [2021-04-15 01:32:23,814 INFO L226 Difference]: Without dead ends: 2948 [2021-04-15 01:32:23,820 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3422 ImplicationChecksByTransitivity, 1157.9ms TimeCoverageRelationStatistics Valid=2000, Invalid=6742, Unknown=0, NotChecked=0, Total=8742 [2021-04-15 01:32:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2021-04-15 01:32:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 2240. [2021-04-15 01:32:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.5908887896382313) internal successors, (5801), 2239 states have internal predecessors, (5801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5801 transitions. [2021-04-15 01:32:23,893 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5801 transitions. Word has length 60 [2021-04-15 01:32:23,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:23,894 INFO L480 AbstractCegarLoop]: Abstraction has 2240 states and 5801 transitions. [2021-04-15 01:32:23,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5801 transitions. [2021-04-15 01:32:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-04-15 01:32:23,900 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:23,901 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:24,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:24,114 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:24,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:24,114 INFO L82 PathProgramCache]: Analyzing trace with hash 132335012, now seen corresponding path program 4 times [2021-04-15 01:32:24,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:24,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916492379] [2021-04-15 01:32:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-04-15 01:32:24,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916492379] [2021-04-15 01:32:24,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120833574] [2021-04-15 01:32:24,244 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:24,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 01:32:24,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:32:24,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 01:32:24,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:32:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-04-15 01:32:24,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:32:24,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-04-15 01:32:24,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414533035] [2021-04-15 01:32:24,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 01:32:24,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:24,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 01:32:24,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 01:32:24,455 INFO L87 Difference]: Start difference. First operand 2240 states and 5801 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:24,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:24,587 INFO L93 Difference]: Finished difference Result 2672 states and 6941 transitions. [2021-04-15 01:32:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 01:32:24,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 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 72 [2021-04-15 01:32:24,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:24,599 INFO L225 Difference]: With dead ends: 2672 [2021-04-15 01:32:24,599 INFO L226 Difference]: Without dead ends: 2672 [2021-04-15 01:32:24,599 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-04-15 01:32:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-04-15 01:32:24,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2672. [2021-04-15 01:32:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2671 states have (on average 2.59865219019094) internal successors, (6941), 2671 states have internal predecessors, (6941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 6941 transitions. [2021-04-15 01:32:24,672 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 6941 transitions. Word has length 72 [2021-04-15 01:32:24,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:24,673 INFO L480 AbstractCegarLoop]: Abstraction has 2672 states and 6941 transitions. [2021-04-15 01:32:24,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:24,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 6941 transitions. [2021-04-15 01:32:24,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-04-15 01:32:24,681 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:24,681 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:24,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-04-15 01:32:24,905 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:24,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:24,906 INFO L82 PathProgramCache]: Analyzing trace with hash 208104744, now seen corresponding path program 5 times [2021-04-15 01:32:24,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:24,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949557164] [2021-04-15 01:32:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-04-15 01:32:25,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949557164] [2021-04-15 01:32:25,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176395733] [2021-04-15 01:32:25,019 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:25,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 01:32:25,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:32:25,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 01:32:25,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:32:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-04-15 01:32:25,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:32:25,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-04-15 01:32:25,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285572587] [2021-04-15 01:32:25,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 01:32:25,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:25,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 01:32:25,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-04-15 01:32:25,247 INFO L87 Difference]: Start difference. First operand 2672 states and 6941 transitions. Second operand has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:25,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:25,849 INFO L93 Difference]: Finished difference Result 9268 states and 24250 transitions. [2021-04-15 01:32:25,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 01:32:25,849 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 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 78 [2021-04-15 01:32:25,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:25,888 INFO L225 Difference]: With dead ends: 9268 [2021-04-15 01:32:25,888 INFO L226 Difference]: Without dead ends: 8963 [2021-04-15 01:32:25,889 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=494, Invalid=2056, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 01:32:25,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8963 states. [2021-04-15 01:32:26,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8963 to 4994. [2021-04-15 01:32:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4994 states, 4993 states have (on average 2.639895854195874) internal successors, (13181), 4993 states have internal predecessors, (13181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:26,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4994 states to 4994 states and 13181 transitions. [2021-04-15 01:32:26,079 INFO L78 Accepts]: Start accepts. Automaton has 4994 states and 13181 transitions. Word has length 78 [2021-04-15 01:32:26,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:26,079 INFO L480 AbstractCegarLoop]: Abstraction has 4994 states and 13181 transitions. [2021-04-15 01:32:26,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:26,080 INFO L276 IsEmpty]: Start isEmpty. Operand 4994 states and 13181 transitions. [2021-04-15 01:32:26,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-04-15 01:32:26,090 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:26,090 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:26,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:26,305 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:26,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:26,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1836362632, now seen corresponding path program 6 times [2021-04-15 01:32:26,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:26,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753824525] [2021-04-15 01:32:26,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-04-15 01:32:26,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753824525] [2021-04-15 01:32:26,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161634847] [2021-04-15 01:32:26,405 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:26,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 01:32:26,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:32:26,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 01:32:26,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:32:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-04-15 01:32:26,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:32:26,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-04-15 01:32:26,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996083504] [2021-04-15 01:32:26,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 01:32:26,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:26,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 01:32:26,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 01:32:26,637 INFO L87 Difference]: Start difference. First operand 4994 states and 13181 transitions. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:26,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:26,770 INFO L93 Difference]: Finished difference Result 6092 states and 16085 transitions. [2021-04-15 01:32:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 01:32:26,770 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-04-15 01:32:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:26,793 INFO L225 Difference]: With dead ends: 6092 [2021-04-15 01:32:26,793 INFO L226 Difference]: Without dead ends: 6092 [2021-04-15 01:32:26,793 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-04-15 01:32:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6092 states. [2021-04-15 01:32:26,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6092 to 6092. [2021-04-15 01:32:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6092 states, 6091 states have (on average 2.64078148087342) internal successors, (16085), 6091 states have internal predecessors, (16085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6092 states to 6092 states and 16085 transitions. [2021-04-15 01:32:26,941 INFO L78 Accepts]: Start accepts. Automaton has 6092 states and 16085 transitions. Word has length 84 [2021-04-15 01:32:26,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:26,942 INFO L480 AbstractCegarLoop]: Abstraction has 6092 states and 16085 transitions. [2021-04-15 01:32:26,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:26,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6092 states and 16085 transitions. [2021-04-15 01:32:26,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-04-15 01:32:26,959 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:26,959 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:27,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:27,178 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:27,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:27,179 INFO L82 PathProgramCache]: Analyzing trace with hash 235697324, now seen corresponding path program 7 times [2021-04-15 01:32:27,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:27,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593053686] [2021-04-15 01:32:27,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 104 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:32:27,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593053686] [2021-04-15 01:32:27,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552194812] [2021-04-15 01:32:27,427 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:27,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 01:32:27,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:32:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 126 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:32:27,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:32:27,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-04-15 01:32:27,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785045769] [2021-04-15 01:32:27,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 01:32:27,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:27,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 01:32:27,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-04-15 01:32:27,747 INFO L87 Difference]: Start difference. First operand 6092 states and 16085 transitions. Second operand has 23 states, 22 states have (on average 4.863636363636363) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:28,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:28,343 INFO L93 Difference]: Finished difference Result 19661 states and 51591 transitions. [2021-04-15 01:32:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 01:32:28,344 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.863636363636363) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 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 90 [2021-04-15 01:32:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:28,377 INFO L225 Difference]: With dead ends: 19661 [2021-04-15 01:32:28,377 INFO L226 Difference]: Without dead ends: 13712 [2021-04-15 01:32:28,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 440.8ms TimeCoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 01:32:28,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13712 states. [2021-04-15 01:32:28,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13712 to 8384. [2021-04-15 01:32:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8384 states, 8383 states have (on average 2.634498389597996) internal successors, (22085), 8383 states have internal predecessors, (22085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:28,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8384 states to 8384 states and 22085 transitions. [2021-04-15 01:32:28,685 INFO L78 Accepts]: Start accepts. Automaton has 8384 states and 22085 transitions. Word has length 90 [2021-04-15 01:32:28,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:28,685 INFO L480 AbstractCegarLoop]: Abstraction has 8384 states and 22085 transitions. [2021-04-15 01:32:28,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 4.863636363636363) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:28,686 INFO L276 IsEmpty]: Start isEmpty. Operand 8384 states and 22085 transitions. [2021-04-15 01:32:28,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-04-15 01:32:28,711 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:28,711 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:28,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 01:32:28,925 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:28,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:28,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1952393284, now seen corresponding path program 8 times [2021-04-15 01:32:28,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:28,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007614977] [2021-04-15 01:32:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-04-15 01:32:29,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007614977] [2021-04-15 01:32:29,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628322775] [2021-04-15 01:32:29,086 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 [2021-04-15 01:32:29,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 01:32:29,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:32:29,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 01:32:29,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:32:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 65 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-04-15 01:32:29,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:32:29,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-04-15 01:32:29,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777777291] [2021-04-15 01:32:29,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 01:32:29,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:29,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 01:32:29,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-04-15 01:32:29,317 INFO L87 Difference]: Start difference. First operand 8384 states and 22085 transitions. Second operand has 17 states, 16 states have (on average 5.75) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:29,757 INFO L93 Difference]: Finished difference Result 25463 states and 66590 transitions. [2021-04-15 01:32:29,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 01:32:29,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.75) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-04-15 01:32:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:29,773 INFO L225 Difference]: With dead ends: 25463 [2021-04-15 01:32:29,773 INFO L226 Difference]: Without dead ends: 6839 [2021-04-15 01:32:29,774 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=322, Invalid=868, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 01:32:29,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6839 states. [2021-04-15 01:32:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6839 to 5606. [2021-04-15 01:32:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5606 states, 5605 states have (on average 2.591971454058876) internal successors, (14528), 5605 states have internal predecessors, (14528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5606 states to 5606 states and 14528 transitions. [2021-04-15 01:32:29,882 INFO L78 Accepts]: Start accepts. Automaton has 5606 states and 14528 transitions. Word has length 90 [2021-04-15 01:32:29,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:29,883 INFO L480 AbstractCegarLoop]: Abstraction has 5606 states and 14528 transitions. [2021-04-15 01:32:29,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 5.75) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 5606 states and 14528 transitions. [2021-04-15 01:32:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-04-15 01:32:29,892 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:29,893 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:30,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:30,109 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:30,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:30,109 INFO L82 PathProgramCache]: Analyzing trace with hash 115214184, now seen corresponding path program 9 times [2021-04-15 01:32:30,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:30,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790921272] [2021-04-15 01:32:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 89 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:32:30,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790921272] [2021-04-15 01:32:30,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294208660] [2021-04-15 01:32:30,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:30,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 01:32:30,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:32:30,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 01:32:30,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:32:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 110 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:32:30,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:32:30,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-04-15 01:32:30,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003591482] [2021-04-15 01:32:30,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 01:32:30,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:30,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 01:32:30,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-04-15 01:32:30,549 INFO L87 Difference]: Start difference. First operand 5606 states and 14528 transitions. Second operand has 21 states, 20 states have (on average 5.35) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:31,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:31,066 INFO L93 Difference]: Finished difference Result 14385 states and 37110 transitions. [2021-04-15 01:32:31,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 01:32:31,067 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.35) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 90 [2021-04-15 01:32:31,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:31,081 INFO L225 Difference]: With dead ends: 14385 [2021-04-15 01:32:31,081 INFO L226 Difference]: Without dead ends: 7430 [2021-04-15 01:32:31,082 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 402.8ms TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 01:32:31,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7430 states. [2021-04-15 01:32:31,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7430 to 5102. [2021-04-15 01:32:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5102 states, 5101 states have (on average 2.5845912566163496) internal successors, (13184), 5101 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:31,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5102 states to 5102 states and 13184 transitions. [2021-04-15 01:32:31,185 INFO L78 Accepts]: Start accepts. Automaton has 5102 states and 13184 transitions. Word has length 90 [2021-04-15 01:32:31,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:31,185 INFO L480 AbstractCegarLoop]: Abstraction has 5102 states and 13184 transitions. [2021-04-15 01:32:31,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 5.35) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:31,186 INFO L276 IsEmpty]: Start isEmpty. Operand 5102 states and 13184 transitions. [2021-04-15 01:32:31,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-04-15 01:32:31,194 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:31,194 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:31,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:31,416 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:31,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:31,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1760561816, now seen corresponding path program 10 times [2021-04-15 01:32:31,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:31,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524292372] [2021-04-15 01:32:31,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 71 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 01:32:31,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524292372] [2021-04-15 01:32:31,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288420501] [2021-04-15 01:32:31,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:31,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 01:32:31,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:32:31,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 01:32:31,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:32:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 89 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 01:32:31,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:32:31,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-04-15 01:32:31,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242266683] [2021-04-15 01:32:31,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 01:32:31,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:31,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 01:32:31,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-04-15 01:32:31,831 INFO L87 Difference]: Start difference. First operand 5102 states and 13184 transitions. Second operand has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:32,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:32,252 INFO L93 Difference]: Finished difference Result 16866 states and 43496 transitions. [2021-04-15 01:32:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 01:32:32,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 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 90 [2021-04-15 01:32:32,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:32,266 INFO L225 Difference]: With dead ends: 16866 [2021-04-15 01:32:32,266 INFO L226 Difference]: Without dead ends: 6857 [2021-04-15 01:32:32,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 01:32:32,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6857 states. [2021-04-15 01:32:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6857 to 4598. [2021-04-15 01:32:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 2.5755927778986294) internal successors, (11840), 4597 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 11840 transitions. [2021-04-15 01:32:32,364 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 11840 transitions. Word has length 90 [2021-04-15 01:32:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:32,364 INFO L480 AbstractCegarLoop]: Abstraction has 4598 states and 11840 transitions. [2021-04-15 01:32:32,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 11840 transitions. [2021-04-15 01:32:32,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-04-15 01:32:32,372 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:32,372 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:32,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-04-15 01:32:32,595 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:32,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1986567320, now seen corresponding path program 11 times [2021-04-15 01:32:32,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:32,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8171368] [2021-04-15 01:32:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 59 proven. 57 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-04-15 01:32:32,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8171368] [2021-04-15 01:32:32,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496929061] [2021-04-15 01:32:32,727 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:32,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 01:32:32,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:32:32,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 01:32:32,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:32:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 74 proven. 42 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-04-15 01:32:32,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:32:32,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-04-15 01:32:32,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110989147] [2021-04-15 01:32:32,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 01:32:32,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:32,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 01:32:32,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-04-15 01:32:32,953 INFO L87 Difference]: Start difference. First operand 4598 states and 11840 transitions. Second operand has 17 states, 16 states have (on average 6.0625) internal successors, (97), 17 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:33,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:33,431 INFO L93 Difference]: Finished difference Result 19947 states and 51466 transitions. [2021-04-15 01:32:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 01:32:33,431 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 6.0625) internal successors, (97), 17 states have internal predecessors, (97), 0 states have call successors, (0), 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 90 [2021-04-15 01:32:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:33,444 INFO L225 Difference]: With dead ends: 19947 [2021-04-15 01:32:33,444 INFO L226 Difference]: Without dead ends: 6284 [2021-04-15 01:32:33,445 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 278.1ms TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2021-04-15 01:32:33,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6284 states. [2021-04-15 01:32:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6284 to 4094. [2021-04-15 01:32:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4093 states have (on average 2.5643782066943563) internal successors, (10496), 4093 states have internal predecessors, (10496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 10496 transitions. [2021-04-15 01:32:33,524 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 10496 transitions. Word has length 90 [2021-04-15 01:32:33,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:33,524 INFO L480 AbstractCegarLoop]: Abstraction has 4094 states and 10496 transitions. [2021-04-15 01:32:33,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 6.0625) internal successors, (97), 17 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 10496 transitions. [2021-04-15 01:32:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-04-15 01:32:33,531 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:33,531 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:33,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-15 01:32:33,754 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:33,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:33,755 INFO L82 PathProgramCache]: Analyzing trace with hash 676614504, now seen corresponding path program 12 times [2021-04-15 01:32:33,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:33,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815119665] [2021-04-15 01:32:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 53 proven. 47 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-04-15 01:32:33,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815119665] [2021-04-15 01:32:33,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697316124] [2021-04-15 01:32:33,865 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:33,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 01:32:33,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:32:33,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 01:32:33,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:32:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 65 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-04-15 01:32:34,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:32:34,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-04-15 01:32:34,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196526354] [2021-04-15 01:32:34,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 01:32:34,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:34,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 01:32:34,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-04-15 01:32:34,073 INFO L87 Difference]: Start difference. First operand 4094 states and 10496 transitions. Second operand has 15 states, 14 states have (on average 6.571428571428571) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:34,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:34,506 INFO L93 Difference]: Finished difference Result 17350 states and 44777 transitions. [2021-04-15 01:32:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 01:32:34,507 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.571428571428571) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-04-15 01:32:34,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:34,535 INFO L225 Difference]: With dead ends: 17350 [2021-04-15 01:32:34,535 INFO L226 Difference]: Without dead ends: 15986 [2021-04-15 01:32:34,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 301.7ms TimeCoverageRelationStatistics Valid=401, Invalid=931, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 01:32:34,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15986 states. [2021-04-15 01:32:34,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15986 to 3446. [2021-04-15 01:32:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 3445 states have (on average 2.5709724238026124) internal successors, (8857), 3445 states have internal predecessors, (8857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 8857 transitions. [2021-04-15 01:32:34,672 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 8857 transitions. Word has length 90 [2021-04-15 01:32:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:34,673 INFO L480 AbstractCegarLoop]: Abstraction has 3446 states and 8857 transitions. [2021-04-15 01:32:34,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 6.571428571428571) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:34,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 8857 transitions. [2021-04-15 01:32:34,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-04-15 01:32:34,679 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:32:34,679 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:32:34,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 01:32:34,893 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 01:32:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:32:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2111671876, now seen corresponding path program 13 times [2021-04-15 01:32:34,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:32:34,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674535957] [2021-04-15 01:32:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:32:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 9 proven. 87 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-04-15 01:32:34,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674535957] [2021-04-15 01:32:34,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913030608] [2021-04-15 01:32:34,991 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:32:35,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 01:32:35,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:32:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 20 proven. 76 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-04-15 01:32:35,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:32:35,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 01:32:35,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590844088] [2021-04-15 01:32:35,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 01:32:35,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:32:35,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 01:32:35,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 01:32:35,203 INFO L87 Difference]: Start difference. First operand 3446 states and 8857 transitions. Second operand has 11 states, 10 states have (on average 8.5) internal successors, (85), 11 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) [2021-04-15 01:32:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:32:35,387 INFO L93 Difference]: Finished difference Result 6340 states and 16450 transitions. [2021-04-15 01:32:35,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 01:32:35,387 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 8.5) internal successors, (85), 11 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 90 [2021-04-15 01:32:35,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:32:35,388 INFO L225 Difference]: With dead ends: 6340 [2021-04-15 01:32:35,388 INFO L226 Difference]: Without dead ends: 0 [2021-04-15 01:32:35,388 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-04-15 01:32:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-15 01:32:35,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-15 01:32:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:32:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-15 01:32:35,389 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2021-04-15 01:32:35,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:32:35,389 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-15 01:32:35,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 8.5) internal successors, (85), 11 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) [2021-04-15 01:32:35,390 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-15 01:32:35,390 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-15 01:32:35,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:32:35,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 01:32:35 BasicIcfg [2021-04-15 01:32:35,616 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 01:32:35,616 INFO L168 Benchmark]: Toolchain (without parser) took 17075.12 ms. Allocated memory was 367.0 MB in the beginning and 729.8 MB in the end (delta: 362.8 MB). Free memory was 329.8 MB in the beginning and 561.3 MB in the end (delta: -231.4 MB). Peak memory consumption was 135.5 MB. Max. memory is 16.0 GB. [2021-04-15 01:32:35,616 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 367.0 MB. Free memory was 348.4 MB in the beginning and 348.3 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 01:32:35,617 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.09 ms. Allocated memory is still 367.0 MB. Free memory was 329.7 MB in the beginning and 351.0 MB in the end (delta: -21.3 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.0 GB. [2021-04-15 01:32:35,617 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.17 ms. Allocated memory is still 367.0 MB. Free memory was 351.0 MB in the beginning and 350.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 01:32:35,617 INFO L168 Benchmark]: Boogie Preprocessor took 33.97 ms. Allocated memory is still 367.0 MB. Free memory was 350.0 MB in the beginning and 348.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 01:32:35,617 INFO L168 Benchmark]: RCFGBuilder took 333.64 ms. Allocated memory is still 367.0 MB. Free memory was 348.7 MB in the beginning and 331.1 MB in the end (delta: 17.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-04-15 01:32:35,617 INFO L168 Benchmark]: TraceAbstraction took 16409.74 ms. Allocated memory was 367.0 MB in the beginning and 729.8 MB in the end (delta: 362.8 MB). Free memory was 330.0 MB in the beginning and 561.3 MB in the end (delta: -231.2 MB). Peak memory consumption was 132.6 MB. Max. memory is 16.0 GB. [2021-04-15 01:32:35,617 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 367.0 MB. Free memory was 348.4 MB in the beginning and 348.3 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 263.09 ms. Allocated memory is still 367.0 MB. Free memory was 329.7 MB in the beginning and 351.0 MB in the end (delta: -21.3 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.17 ms. Allocated memory is still 367.0 MB. Free memory was 351.0 MB in the beginning and 350.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 33.97 ms. Allocated memory is still 367.0 MB. Free memory was 350.0 MB in the beginning and 348.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 333.64 ms. Allocated memory is still 367.0 MB. Free memory was 348.7 MB in the beginning and 331.1 MB in the end (delta: 17.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 16409.74 ms. Allocated memory was 367.0 MB in the beginning and 729.8 MB in the end (delta: 362.8 MB). Free memory was 330.0 MB in the beginning and 561.3 MB in the end (delta: -231.2 MB). Peak memory consumption was 132.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16302.6ms, OverallIterations: 16, TraceHistogramMax: 5, EmptinessCheckTime: 137.1ms, AutomataDifference: 6187.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2158 SDtfs, 7609 SDslu, 10880 SDs, 0 SdLazy, 2612 SolverSat, 493 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1490.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1594 GetRequests, 1143 SyntacticMatches, 0 SemanticMatches, 451 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5838 ImplicationChecksByTransitivity, 4331.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8384occurred in iteration=10, InterpolantAutomatonStates: 365, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1492.5ms AutomataMinimizationTime, 16 MinimizatonAttempts, 31551 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 187.3ms SsaConstructionTime, 650.8ms SatisfiabilityAnalysisTime, 3994.7ms InterpolantComputationTime, 2172 NumberOfCodeBlocks, 2160 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 2142 ConstructedInterpolants, 0 QuantifiedInterpolants, 5476 SizeOfPredicates, 120 NumberOfNonLiveVariables, 1866 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 1596/2420 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...