/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-e5469eb [2021-01-20 11:32:24,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-20 11:32:24,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-20 11:32:24,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-20 11:32:24,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-20 11:32:24,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-20 11:32:24,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-20 11:32:24,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-20 11:32:24,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-20 11:32:24,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-20 11:32:24,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-20 11:32:24,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-20 11:32:24,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-20 11:32:24,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-20 11:32:24,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-20 11:32:24,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-20 11:32:24,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-20 11:32:24,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-20 11:32:24,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-20 11:32:24,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-20 11:32:24,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-20 11:32:24,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-20 11:32:24,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-20 11:32:24,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-20 11:32:24,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-20 11:32:24,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-20 11:32:24,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-20 11:32:24,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-20 11:32:24,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-20 11:32:24,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-20 11:32:24,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-20 11:32:24,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-20 11:32:24,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-20 11:32:24,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-20 11:32:24,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-20 11:32:24,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-20 11:32:24,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-20 11:32:24,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-20 11:32:24,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-20 11:32:24,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-20 11:32:24,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-20 11:32:24,701 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-01-20 11:32:24,753 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-20 11:32:24,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-20 11:32:24,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-20 11:32:24,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-20 11:32:24,759 INFO L138 SettingsManager]: * Use SBE=true [2021-01-20 11:32:24,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-20 11:32:24,759 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-20 11:32:24,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-20 11:32:24,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-20 11:32:24,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-20 11:32:24,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-20 11:32:24,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-20 11:32:24,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-20 11:32:24,761 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-20 11:32:24,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-20 11:32:24,762 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-20 11:32:24,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-20 11:32:24,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-20 11:32:24,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-20 11:32:24,763 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-20 11:32:24,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-20 11:32:24,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 11:32:24,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-20 11:32:24,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-20 11:32:24,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-20 11:32:24,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-20 11:32:24,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-20 11:32:24,765 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-20 11:32:24,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-20 11:32:24,765 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-20 11:32:24,765 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-20 11:32:25,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-20 11:32:25,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-20 11:32:25,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-20 11:32:25,180 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-20 11:32:25,181 INFO L275 PluginConnector]: CDTParser initialized [2021-01-20 11:32:25,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2021-01-20 11:32:25,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9c6a8ac/3bf182e8e19346b1b47d5655ca40fed2/FLAG49e029fca [2021-01-20 11:32:25,995 INFO L306 CDTParser]: Found 1 translation units. [2021-01-20 11:32:25,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2021-01-20 11:32:26,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9c6a8ac/3bf182e8e19346b1b47d5655ca40fed2/FLAG49e029fca [2021-01-20 11:32:26,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9c6a8ac/3bf182e8e19346b1b47d5655ca40fed2 [2021-01-20 11:32:26,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-20 11:32:26,261 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-20 11:32:26,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-20 11:32:26,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-20 11:32:26,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-20 11:32:26,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@470dbe09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26, skipping insertion in model container [2021-01-20 11:32:26,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-20 11:32:26,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-20 11:32:26,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 11:32:26,908 INFO L203 MainTranslator]: Completed pre-run [2021-01-20 11:32:26,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 11:32:27,058 INFO L208 MainTranslator]: Completed translation [2021-01-20 11:32:27,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27 WrapperNode [2021-01-20 11:32:27,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-20 11:32:27,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-20 11:32:27,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-20 11:32:27,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-20 11:32:27,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-20 11:32:27,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-20 11:32:27,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-20 11:32:27,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-20 11:32:27,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-20 11:32:27,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-20 11:32:27,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-20 11:32:27,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-20 11:32:27,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (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 [2021-01-20 11:32:27,315 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-20 11:32:27,315 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-20 11:32:27,316 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-20 11:32:27,316 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-20 11:32:27,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-20 11:32:27,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-20 11:32:27,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-20 11:32:27,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-20 11:32:27,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-20 11:32:27,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-20 11:32:27,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-20 11:32:27,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-20 11:32:27,319 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-20 11:32:27,786 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-20 11:32:27,787 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-20 11:32:27,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:32:27 BoogieIcfgContainer [2021-01-20 11:32:27,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-20 11:32:27,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-20 11:32:27,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-20 11:32:27,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-20 11:32:27,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:32:26" (1/3) ... [2021-01-20 11:32:27,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@539e3edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:32:27, skipping insertion in model container [2021-01-20 11:32:27,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (2/3) ... [2021-01-20 11:32:27,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@539e3edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:32:27, skipping insertion in model container [2021-01-20 11:32:27,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:32:27" (3/3) ... [2021-01-20 11:32:27,798 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2021-01-20 11:32:27,814 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-20 11:32:27,814 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-20 11:32:27,818 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-20 11:32:27,819 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-20 11:32:27,850 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,851 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,851 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,851 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,851 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,852 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,852 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,852 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,852 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,852 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,853 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,853 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,853 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,853 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,854 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,854 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,854 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,854 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,854 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,855 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,855 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,855 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,855 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,856 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,856 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,856 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,856 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,856 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,857 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,857 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,857 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,858 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,858 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,858 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,858 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,858 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,858 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,859 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,859 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,859 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,859 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,860 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,860 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,860 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,860 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,860 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,861 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,861 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,861 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,861 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,862 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,862 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,862 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,862 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,862 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,863 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,863 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,863 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,863 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,863 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,866 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,866 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,866 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,866 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,867 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,867 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,875 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,875 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,875 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,876 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,876 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,876 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,879 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-20 11:32:27,892 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-20 11:32:27,915 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-20 11:32:27,915 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-20 11:32:27,915 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-20 11:32:27,915 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-20 11:32:27,915 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-20 11:32:27,915 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-20 11:32:27,915 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-20 11:32:27,916 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-20 11:32:27,928 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2021-01-20 11:32:28,092 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:28,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:28,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-20 11:32:28,120 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:28,121 INFO L504 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] [2021-01-20 11:32:28,121 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:28,129 INFO L82 PathProgramCache]: Analyzing trace with hash 811106412, now seen corresponding path program 1 times [2021-01-20 11:32:28,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:28,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516537917] [2021-01-20 11:32:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:28,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516537917] [2021-01-20 11:32:28,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:28,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 11:32:28,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747539168] [2021-01-20 11:32:28,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 11:32:28,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:28,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 11:32:28,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 11:32:28,609 INFO L87 Difference]: Start difference. First operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:28,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:28,937 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2021-01-20 11:32:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 11:32:28,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-01-20 11:32:28,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:28,972 INFO L225 Difference]: With dead ends: 4034 [2021-01-20 11:32:28,972 INFO L226 Difference]: Without dead ends: 1472 [2021-01-20 11:32:28,974 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 11:32:28,974 INFO L78 Accepts]: Start accepts. Automaton has 1472 states. Word has length 28 [2021-01-20 11:32:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:28,976 INFO L481 AbstractCegarLoop]: Abstraction has 1472 states. [2021-01-20 11:32:28,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:28,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states. [2021-01-20 11:32:28,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 11:32:28,985 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:28,985 INFO L504 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] [2021-01-20 11:32:28,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-20 11:32:28,986 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:28,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2008820546, now seen corresponding path program 1 times [2021-01-20 11:32:28,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:28,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461780818] [2021-01-20 11:32:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:29,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461780818] [2021-01-20 11:32:29,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:29,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:32:29,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624146605] [2021-01-20 11:32:29,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:32:29,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:29,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:32:29,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:32:29,309 INFO L87 Difference]: Start difference. First operand 1472 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:29,582 INFO L93 Difference]: Finished difference Result 1984 states and 5365 transitions. [2021-01-20 11:32:29,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 11:32:29,584 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-01-20 11:32:29,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:29,598 INFO L225 Difference]: With dead ends: 1984 [2021-01-20 11:32:29,598 INFO L226 Difference]: Without dead ends: 1726 [2021-01-20 11:32:29,599 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:32:29,600 INFO L78 Accepts]: Start accepts. Automaton has 1726 states. Word has length 33 [2021-01-20 11:32:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:29,600 INFO L481 AbstractCegarLoop]: Abstraction has 1726 states. [2021-01-20 11:32:29,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:29,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states. [2021-01-20 11:32:29,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 11:32:29,604 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:29,604 INFO L504 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] [2021-01-20 11:32:29,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-20 11:32:29,604 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:29,605 INFO L82 PathProgramCache]: Analyzing trace with hash 103991554, now seen corresponding path program 1 times [2021-01-20 11:32:29,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:29,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083979118] [2021-01-20 11:32:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:29,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083979118] [2021-01-20 11:32:29,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:29,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:32:29,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979674486] [2021-01-20 11:32:29,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:32:29,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:29,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:32:29,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:32:29,831 INFO L87 Difference]: Start difference. First operand 1726 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:30,052 INFO L93 Difference]: Finished difference Result 2110 states and 5584 transitions. [2021-01-20 11:32:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 11:32:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-01-20 11:32:30,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:30,070 INFO L225 Difference]: With dead ends: 2110 [2021-01-20 11:32:30,070 INFO L226 Difference]: Without dead ends: 1806 [2021-01-20 11:32:30,072 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:32:30,072 INFO L78 Accepts]: Start accepts. Automaton has 1806 states. Word has length 33 [2021-01-20 11:32:30,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:30,073 INFO L481 AbstractCegarLoop]: Abstraction has 1806 states. [2021-01-20 11:32:30,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states. [2021-01-20 11:32:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 11:32:30,077 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:30,077 INFO L504 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] [2021-01-20 11:32:30,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-20 11:32:30,078 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:30,079 INFO L82 PathProgramCache]: Analyzing trace with hash -899974956, now seen corresponding path program 2 times [2021-01-20 11:32:30,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:30,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950187000] [2021-01-20 11:32:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:30,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950187000] [2021-01-20 11:32:30,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:30,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:32:30,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288244185] [2021-01-20 11:32:30,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:32:30,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:30,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:32:30,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:32:30,392 INFO L87 Difference]: Start difference. First operand 1806 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:30,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:30,659 INFO L93 Difference]: Finished difference Result 2318 states and 6128 transitions. [2021-01-20 11:32:30,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-20 11:32:30,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-01-20 11:32:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:30,676 INFO L225 Difference]: With dead ends: 2318 [2021-01-20 11:32:30,676 INFO L226 Difference]: Without dead ends: 1996 [2021-01-20 11:32:30,676 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-20 11:32:30,677 INFO L78 Accepts]: Start accepts. Automaton has 1996 states. Word has length 33 [2021-01-20 11:32:30,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:30,678 INFO L481 AbstractCegarLoop]: Abstraction has 1996 states. [2021-01-20 11:32:30,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states. [2021-01-20 11:32:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:30,683 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:30,683 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:30,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-20 11:32:30,684 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash -421493469, now seen corresponding path program 1 times [2021-01-20 11:32:30,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:30,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860933604] [2021-01-20 11:32:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:30,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860933604] [2021-01-20 11:32:30,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180148181] [2021-01-20 11:32:30,929 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 [2021-01-20 11:32:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:31,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 11:32:31,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:31,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:31,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:31,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:31,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-20 11:32:31,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069484035] [2021-01-20 11:32:31,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 11:32:31,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:31,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 11:32:31,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-20 11:32:31,226 INFO L87 Difference]: Start difference. First operand 1996 states. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:31,693 INFO L93 Difference]: Finished difference Result 2908 states and 7595 transitions. [2021-01-20 11:32:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-20 11:32:31,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 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 38 [2021-01-20 11:32:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:31,712 INFO L225 Difference]: With dead ends: 2908 [2021-01-20 11:32:31,712 INFO L226 Difference]: Without dead ends: 2544 [2021-01-20 11:32:31,713 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:32:31,713 INFO L78 Accepts]: Start accepts. Automaton has 2544 states. Word has length 38 [2021-01-20 11:32:31,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:31,714 INFO L481 AbstractCegarLoop]: Abstraction has 2544 states. [2021-01-20 11:32:31,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:31,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states. [2021-01-20 11:32:31,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:31,718 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:31,718 INFO L504 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] [2021-01-20 11:32:31,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:31,933 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:31,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:31,934 INFO L82 PathProgramCache]: Analyzing trace with hash -869705744, now seen corresponding path program 1 times [2021-01-20 11:32:31,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:31,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669599251] [2021-01-20 11:32:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:32,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669599251] [2021-01-20 11:32:32,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:32,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 11:32:32,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458474381] [2021-01-20 11:32:32,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 11:32:32,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:32,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 11:32:32,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-20 11:32:32,085 INFO L87 Difference]: Start difference. First operand 2544 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:32,225 INFO L93 Difference]: Finished difference Result 2736 states and 7057 transitions. [2021-01-20 11:32:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 11:32:32,226 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-01-20 11:32:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:32,243 INFO L225 Difference]: With dead ends: 2736 [2021-01-20 11:32:32,243 INFO L226 Difference]: Without dead ends: 2584 [2021-01-20 11:32:32,244 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:32:32,244 INFO L78 Accepts]: Start accepts. Automaton has 2584 states. Word has length 38 [2021-01-20 11:32:32,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:32,244 INFO L481 AbstractCegarLoop]: Abstraction has 2584 states. [2021-01-20 11:32:32,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:32,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states. [2021-01-20 11:32:32,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:32,248 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:32,248 INFO L504 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] [2021-01-20 11:32:32,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-20 11:32:32,249 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:32,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:32,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1873672254, now seen corresponding path program 2 times [2021-01-20 11:32:32,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:32,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411014054] [2021-01-20 11:32:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:32,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411014054] [2021-01-20 11:32:32,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:32,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 11:32:32,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624204172] [2021-01-20 11:32:32,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 11:32:32,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:32,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 11:32:32,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-20 11:32:32,444 INFO L87 Difference]: Start difference. First operand 2584 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:32,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:32,664 INFO L93 Difference]: Finished difference Result 3152 states and 8081 transitions. [2021-01-20 11:32:32,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 11:32:32,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-01-20 11:32:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:32,683 INFO L225 Difference]: With dead ends: 3152 [2021-01-20 11:32:32,683 INFO L226 Difference]: Without dead ends: 2894 [2021-01-20 11:32:32,684 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-01-20 11:32:32,684 INFO L78 Accepts]: Start accepts. Automaton has 2894 states. Word has length 38 [2021-01-20 11:32:32,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:32,685 INFO L481 AbstractCegarLoop]: Abstraction has 2894 states. [2021-01-20 11:32:32,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:32,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states. [2021-01-20 11:32:32,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:32,689 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:32,689 INFO L504 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] [2021-01-20 11:32:32,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-20 11:32:32,690 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:32,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:32,690 INFO L82 PathProgramCache]: Analyzing trace with hash 587213024, now seen corresponding path program 3 times [2021-01-20 11:32:32,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:32,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947197636] [2021-01-20 11:32:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:32,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947197636] [2021-01-20 11:32:32,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:32,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 11:32:32,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547898370] [2021-01-20 11:32:32,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 11:32:32,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:32,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 11:32:32,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-20 11:32:32,825 INFO L87 Difference]: Start difference. First operand 2894 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:33,088 INFO L93 Difference]: Finished difference Result 3742 states and 9548 transitions. [2021-01-20 11:32:33,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 11:32:33,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-01-20 11:32:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:33,111 INFO L225 Difference]: With dead ends: 3742 [2021-01-20 11:32:33,111 INFO L226 Difference]: Without dead ends: 3314 [2021-01-20 11:32:33,112 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:33,112 INFO L78 Accepts]: Start accepts. Automaton has 3314 states. Word has length 38 [2021-01-20 11:32:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:33,112 INFO L481 AbstractCegarLoop]: Abstraction has 3314 states. [2021-01-20 11:32:33,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:33,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3314 states. [2021-01-20 11:32:33,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:33,119 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:33,119 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:33,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-20 11:32:33,119 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:33,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:33,120 INFO L82 PathProgramCache]: Analyzing trace with hash 810819243, now seen corresponding path program 1 times [2021-01-20 11:32:33,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:33,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728025431] [2021-01-20 11:32:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:33,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728025431] [2021-01-20 11:32:33,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811798747] [2021-01-20 11:32:33,296 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 [2021-01-20 11:32:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:33,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:33,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:33,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:33,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:33,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:33,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042556358] [2021-01-20 11:32:33,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:33,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:33,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:33,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:33,530 INFO L87 Difference]: Start difference. First operand 3314 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:33,765 INFO L93 Difference]: Finished difference Result 3506 states and 8882 transitions. [2021-01-20 11:32:33,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 11:32:33,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 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 43 [2021-01-20 11:32:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:33,777 INFO L225 Difference]: With dead ends: 3506 [2021-01-20 11:32:33,777 INFO L226 Difference]: Without dead ends: 3354 [2021-01-20 11:32:33,778 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:32:33,778 INFO L78 Accepts]: Start accepts. Automaton has 3354 states. Word has length 43 [2021-01-20 11:32:33,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:33,779 INFO L481 AbstractCegarLoop]: Abstraction has 3354 states. [2021-01-20 11:32:33,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:33,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states. [2021-01-20 11:32:33,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:33,785 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:33,785 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:33,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:34,000 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:34,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:34,001 INFO L82 PathProgramCache]: Analyzing trace with hash -193147267, now seen corresponding path program 2 times [2021-01-20 11:32:34,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:34,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634559039] [2021-01-20 11:32:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:34,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634559039] [2021-01-20 11:32:34,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410819259] [2021-01-20 11:32:34,179 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 [2021-01-20 11:32:34,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:34,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:34,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:34,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:34,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:34,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:34,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:34,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:34,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473046635] [2021-01-20 11:32:34,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:34,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:34,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:34,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:34,511 INFO L87 Difference]: Start difference. First operand 3354 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:35,054 INFO L93 Difference]: Finished difference Result 4338 states and 10930 transitions. [2021-01-20 11:32:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:32:35,055 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 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 43 [2021-01-20 11:32:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:35,078 INFO L225 Difference]: With dead ends: 4338 [2021-01-20 11:32:35,078 INFO L226 Difference]: Without dead ends: 3974 [2021-01-20 11:32:35,079 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-01-20 11:32:35,080 INFO L78 Accepts]: Start accepts. Automaton has 3974 states. Word has length 43 [2021-01-20 11:32:35,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:35,080 INFO L481 AbstractCegarLoop]: Abstraction has 3974 states. [2021-01-20 11:32:35,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states. [2021-01-20 11:32:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:35,088 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:35,088 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:35,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-20 11:32:35,303 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:35,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:35,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2089322251, now seen corresponding path program 1 times [2021-01-20 11:32:35,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:35,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681174795] [2021-01-20 11:32:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:35,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681174795] [2021-01-20 11:32:35,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948274538] [2021-01-20 11:32:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-01-20 11:32:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:35,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:35,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:35,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:35,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:35,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:35,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106458884] [2021-01-20 11:32:35,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:35,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:35,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:35,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:35,695 INFO L87 Difference]: Start difference. First operand 3974 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:36,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:36,297 INFO L93 Difference]: Finished difference Result 4598 states and 11320 transitions. [2021-01-20 11:32:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 11:32:36,298 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 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 43 [2021-01-20 11:32:36,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:36,312 INFO L225 Difference]: With dead ends: 4598 [2021-01-20 11:32:36,313 INFO L226 Difference]: Without dead ends: 4294 [2021-01-20 11:32:36,314 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:32:36,314 INFO L78 Accepts]: Start accepts. Automaton has 4294 states. Word has length 43 [2021-01-20 11:32:36,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:36,315 INFO L481 AbstractCegarLoop]: Abstraction has 4294 states. [2021-01-20 11:32:36,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states. [2021-01-20 11:32:36,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:36,323 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:36,323 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:36,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:36,538 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:36,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:36,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1853174015, now seen corresponding path program 2 times [2021-01-20 11:32:36,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:36,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323466589] [2021-01-20 11:32:36,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:36,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323466589] [2021-01-20 11:32:36,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534323990] [2021-01-20 11:32:36,689 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 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 [2021-01-20 11:32:36,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:36,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:36,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:36,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:36,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:36,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:36,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:36,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143540449] [2021-01-20 11:32:36,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:36,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:36,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:36,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:36,888 INFO L87 Difference]: Start difference. First operand 4294 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:37,275 INFO L93 Difference]: Finished difference Result 4758 states and 11640 transitions. [2021-01-20 11:32:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:32:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 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 43 [2021-01-20 11:32:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:37,290 INFO L225 Difference]: With dead ends: 4758 [2021-01-20 11:32:37,290 INFO L226 Difference]: Without dead ends: 4454 [2021-01-20 11:32:37,291 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-01-20 11:32:37,291 INFO L78 Accepts]: Start accepts. Automaton has 4454 states. Word has length 43 [2021-01-20 11:32:37,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:37,292 INFO L481 AbstractCegarLoop]: Abstraction has 4454 states. [2021-01-20 11:32:37,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4454 states. [2021-01-20 11:32:37,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:37,300 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:37,300 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:37,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-20 11:32:37,513 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:37,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:37,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2013675815, now seen corresponding path program 3 times [2021-01-20 11:32:37,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:37,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207795779] [2021-01-20 11:32:37,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:37,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207795779] [2021-01-20 11:32:37,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246163542] [2021-01-20 11:32:37,693 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 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 [2021-01-20 11:32:37,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 11:32:37,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:37,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:37,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:37,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:37,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:37,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:37,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:37,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52034326] [2021-01-20 11:32:37,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:37,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:37,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:37,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:37,926 INFO L87 Difference]: Start difference. First operand 4454 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:38,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:38,787 INFO L93 Difference]: Finished difference Result 6124 states and 15171 transitions. [2021-01-20 11:32:38,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:32:38,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 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 43 [2021-01-20 11:32:38,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:38,814 INFO L225 Difference]: With dead ends: 6124 [2021-01-20 11:32:38,814 INFO L226 Difference]: Without dead ends: 5484 [2021-01-20 11:32:38,815 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:32:38,815 INFO L78 Accepts]: Start accepts. Automaton has 5484 states. Word has length 43 [2021-01-20 11:32:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:38,816 INFO L481 AbstractCegarLoop]: Abstraction has 5484 states. [2021-01-20 11:32:38,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:38,816 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states. [2021-01-20 11:32:38,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:38,828 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:38,828 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:39,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:39,043 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:39,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:39,044 INFO L82 PathProgramCache]: Analyzing trace with hash 264667651, now seen corresponding path program 2 times [2021-01-20 11:32:39,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:39,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653791685] [2021-01-20 11:32:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:39,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653791685] [2021-01-20 11:32:39,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318444105] [2021-01-20 11:32:39,268 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 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 [2021-01-20 11:32:39,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:39,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:39,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:39,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:39,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:39,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:39,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:39,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 11:32:39,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461790696] [2021-01-20 11:32:39,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:32:39,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:39,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:32:39,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:39,560 INFO L87 Difference]: Start difference. First operand 5484 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 11:32:39,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:39,929 INFO L93 Difference]: Finished difference Result 6556 states and 16031 transitions. [2021-01-20 11:32:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-20 11:32:39,930 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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 48 [2021-01-20 11:32:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:39,948 INFO L225 Difference]: With dead ends: 6556 [2021-01-20 11:32:39,949 INFO L226 Difference]: Without dead ends: 6192 [2021-01-20 11:32:39,949 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-01-20 11:32:39,950 INFO L78 Accepts]: Start accepts. Automaton has 6192 states. Word has length 48 [2021-01-20 11:32:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:39,950 INFO L481 AbstractCegarLoop]: Abstraction has 6192 states. [2021-01-20 11:32:39,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 11:32:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states. [2021-01-20 11:32:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:39,960 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:39,960 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:40,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-20 11:32:40,175 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:40,176 INFO L82 PathProgramCache]: Analyzing trace with hash -183544624, now seen corresponding path program 3 times [2021-01-20 11:32:40,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:40,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580250443] [2021-01-20 11:32:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:40,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580250443] [2021-01-20 11:32:40,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671923489] [2021-01-20 11:32:40,346 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 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 [2021-01-20 11:32:40,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:32:40,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:40,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:40,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:40,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:40,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:40,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:40,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108768506] [2021-01-20 11:32:40,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:40,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:40,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:40,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:40,660 INFO L87 Difference]: Start difference. First operand 6192 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:40,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:40,907 INFO L93 Difference]: Finished difference Result 6384 states and 15493 transitions. [2021-01-20 11:32:40,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 11:32:40,908 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 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 48 [2021-01-20 11:32:40,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:40,919 INFO L225 Difference]: With dead ends: 6384 [2021-01-20 11:32:40,920 INFO L226 Difference]: Without dead ends: 6232 [2021-01-20 11:32:40,920 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:32:40,920 INFO L78 Accepts]: Start accepts. Automaton has 6232 states. Word has length 48 [2021-01-20 11:32:40,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:40,921 INFO L481 AbstractCegarLoop]: Abstraction has 6232 states. [2021-01-20 11:32:40,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:40,921 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states. [2021-01-20 11:32:40,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:40,930 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:40,930 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:41,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-20 11:32:41,146 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:41,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1187511134, now seen corresponding path program 4 times [2021-01-20 11:32:41,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:41,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598029840] [2021-01-20 11:32:41,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:41,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598029840] [2021-01-20 11:32:41,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748605649] [2021-01-20 11:32:41,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:32:41,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:32:41,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:41,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:41,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:41,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:41,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:41,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:41,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:41,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439012387] [2021-01-20 11:32:41,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:41,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:41,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:41,603 INFO L87 Difference]: Start difference. First operand 6232 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:42,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:42,239 INFO L93 Difference]: Finished difference Result 7096 states and 17301 transitions. [2021-01-20 11:32:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 11:32:42,239 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 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 48 [2021-01-20 11:32:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:42,248 INFO L225 Difference]: With dead ends: 7096 [2021-01-20 11:32:42,248 INFO L226 Difference]: Without dead ends: 6732 [2021-01-20 11:32:42,249 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-01-20 11:32:42,249 INFO L78 Accepts]: Start accepts. Automaton has 6732 states. Word has length 48 [2021-01-20 11:32:42,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:42,249 INFO L481 AbstractCegarLoop]: Abstraction has 6732 states. [2021-01-20 11:32:42,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:42,249 INFO L276 IsEmpty]: Start isEmpty. Operand 6732 states. [2021-01-20 11:32:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:42,258 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:42,258 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:42,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-20 11:32:42,460 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:42,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:42,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1211281178, now seen corresponding path program 1 times [2021-01-20 11:32:42,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:42,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144859235] [2021-01-20 11:32:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:42,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144859235] [2021-01-20 11:32:42,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084671247] [2021-01-20 11:32:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-01-20 11:32:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:42,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:42,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:42,885 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-01-20 11:32:42,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:42,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:42,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:42,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351695308] [2021-01-20 11:32:42,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:42,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:42,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:42,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:42,947 INFO L87 Difference]: Start difference. First operand 6732 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:43,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:43,328 INFO L93 Difference]: Finished difference Result 7044 states and 17003 transitions. [2021-01-20 11:32:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 11:32:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 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 48 [2021-01-20 11:32:43,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:43,338 INFO L225 Difference]: With dead ends: 7044 [2021-01-20 11:32:43,338 INFO L226 Difference]: Without dead ends: 6892 [2021-01-20 11:32:43,339 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-01-20 11:32:43,339 INFO L78 Accepts]: Start accepts. Automaton has 6892 states. Word has length 48 [2021-01-20 11:32:43,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:43,339 INFO L481 AbstractCegarLoop]: Abstraction has 6892 states. [2021-01-20 11:32:43,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:43,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6892 states. [2021-01-20 11:32:43,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:43,349 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:43,349 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:43,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-20 11:32:43,555 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:43,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:43,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1447429414, now seen corresponding path program 2 times [2021-01-20 11:32:43,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:43,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140582035] [2021-01-20 11:32:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:43,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140582035] [2021-01-20 11:32:43,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691590621] [2021-01-20 11:32:43,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:43,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:43,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:43,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:43,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:43,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:43,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:43,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:43,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370678757] [2021-01-20 11:32:43,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:43,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:43,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:43,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:43,982 INFO L87 Difference]: Start difference. First operand 6892 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:44,429 INFO L93 Difference]: Finished difference Result 7124 states and 17163 transitions. [2021-01-20 11:32:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:32:44,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 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 48 [2021-01-20 11:32:44,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:44,438 INFO L225 Difference]: With dead ends: 7124 [2021-01-20 11:32:44,438 INFO L226 Difference]: Without dead ends: 6972 [2021-01-20 11:32:44,439 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-01-20 11:32:44,439 INFO L78 Accepts]: Start accepts. Automaton has 6972 states. Word has length 48 [2021-01-20 11:32:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:44,439 INFO L481 AbstractCegarLoop]: Abstraction has 6972 states. [2021-01-20 11:32:44,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states. [2021-01-20 11:32:44,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:44,448 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:44,448 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:44,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-20 11:32:44,661 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:44,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1019311948, now seen corresponding path program 3 times [2021-01-20 11:32:44,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:44,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161011090] [2021-01-20 11:32:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:44,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161011090] [2021-01-20 11:32:44,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240211354] [2021-01-20 11:32:44,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:44,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 11:32:44,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:44,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:44,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:45,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:45,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:45,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:45,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:45,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:45,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 11:32:45,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376900792] [2021-01-20 11:32:45,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:32:45,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:45,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:32:45,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:45,246 INFO L87 Difference]: Start difference. First operand 6972 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 11:32:46,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:46,497 INFO L93 Difference]: Finished difference Result 9334 states and 22444 transitions. [2021-01-20 11:32:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:32:46,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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 48 [2021-01-20 11:32:46,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:46,515 INFO L225 Difference]: With dead ends: 9334 [2021-01-20 11:32:46,515 INFO L226 Difference]: Without dead ends: 8642 [2021-01-20 11:32:46,516 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=1727, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 11:32:46,516 INFO L78 Accepts]: Start accepts. Automaton has 8642 states. Word has length 48 [2021-01-20 11:32:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:46,517 INFO L481 AbstractCegarLoop]: Abstraction has 8642 states. [2021-01-20 11:32:46,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 11:32:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 8642 states. [2021-01-20 11:32:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:46,526 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:46,526 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:46,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:46,740 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:46,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:46,741 INFO L82 PathProgramCache]: Analyzing trace with hash 310617624, now seen corresponding path program 4 times [2021-01-20 11:32:46,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:46,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207072320] [2021-01-20 11:32:46,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:46,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207072320] [2021-01-20 11:32:46,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231088294] [2021-01-20 11:32:46,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:46,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:32:46,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:46,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:46,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:47,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:47,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:47,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:47,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610179865] [2021-01-20 11:32:47,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:47,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:47,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:47,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:47,124 INFO L87 Difference]: Start difference. First operand 8642 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:47,553 INFO L93 Difference]: Finished difference Result 9234 states and 21858 transitions. [2021-01-20 11:32:47,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 11:32:47,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 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 48 [2021-01-20 11:32:47,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:47,564 INFO L225 Difference]: With dead ends: 9234 [2021-01-20 11:32:47,565 INFO L226 Difference]: Without dead ends: 9082 [2021-01-20 11:32:47,565 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-01-20 11:32:47,565 INFO L78 Accepts]: Start accepts. Automaton has 9082 states. Word has length 48 [2021-01-20 11:32:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:47,566 INFO L481 AbstractCegarLoop]: Abstraction has 9082 states. [2021-01-20 11:32:47,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 9082 states. [2021-01-20 11:32:47,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:47,643 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:47,644 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:47,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-20 11:32:47,845 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:47,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:47,846 INFO L82 PathProgramCache]: Analyzing trace with hash -958721652, now seen corresponding path program 5 times [2021-01-20 11:32:47,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:47,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970813914] [2021-01-20 11:32:47,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:47,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970813914] [2021-01-20 11:32:47,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425638857] [2021-01-20 11:32:47,998 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 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 [2021-01-20 11:32:48,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:48,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:48,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:48,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:48,231 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:48,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:48,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:48,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729346648] [2021-01-20 11:32:48,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:48,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:48,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:48,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:48,262 INFO L87 Difference]: Start difference. First operand 9082 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:48,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:48,966 INFO L93 Difference]: Finished difference Result 9674 states and 22738 transitions. [2021-01-20 11:32:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:32:48,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 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 48 [2021-01-20 11:32:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:48,980 INFO L225 Difference]: With dead ends: 9674 [2021-01-20 11:32:48,981 INFO L226 Difference]: Without dead ends: 9522 [2021-01-20 11:32:48,981 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-01-20 11:32:48,981 INFO L78 Accepts]: Start accepts. Automaton has 9522 states. Word has length 48 [2021-01-20 11:32:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:48,982 INFO L481 AbstractCegarLoop]: Abstraction has 9522 states. [2021-01-20 11:32:48,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 9522 states. [2021-01-20 11:32:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:48,992 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:48,992 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:49,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:49,201 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:49,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:49,202 INFO L82 PathProgramCache]: Analyzing trace with hash 763359212, now seen corresponding path program 6 times [2021-01-20 11:32:49,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:49,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004737954] [2021-01-20 11:32:49,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:49,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004737954] [2021-01-20 11:32:49,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211302703] [2021-01-20 11:32:49,359 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:49,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-20 11:32:49,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:49,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:49,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:49,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:49,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:49,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:49,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994246126] [2021-01-20 11:32:49,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:49,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:49,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:49,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:49,581 INFO L87 Difference]: Start difference. First operand 9522 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:50,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:50,264 INFO L93 Difference]: Finished difference Result 10144 states and 23773 transitions. [2021-01-20 11:32:50,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:32:50,265 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 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 48 [2021-01-20 11:32:50,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:50,275 INFO L225 Difference]: With dead ends: 10144 [2021-01-20 11:32:50,276 INFO L226 Difference]: Without dead ends: 9992 [2021-01-20 11:32:50,276 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-01-20 11:32:50,276 INFO L78 Accepts]: Start accepts. Automaton has 9992 states. Word has length 48 [2021-01-20 11:32:50,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:50,276 INFO L481 AbstractCegarLoop]: Abstraction has 9992 states. [2021-01-20 11:32:50,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 9992 states. [2021-01-20 11:32:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:50,284 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:50,284 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:50,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-20 11:32:50,485 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1519359984, now seen corresponding path program 7 times [2021-01-20 11:32:50,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:50,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216372599] [2021-01-20 11:32:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:50,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216372599] [2021-01-20 11:32:50,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393256770] [2021-01-20 11:32:50,717 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:50,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:50,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:50,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:50,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:50,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:50,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 11:32:50,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967612611] [2021-01-20 11:32:50,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:32:50,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:50,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:32:50,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:50,937 INFO L87 Difference]: Start difference. First operand 9992 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 11:32:52,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:52,284 INFO L93 Difference]: Finished difference Result 12930 states and 30398 transitions. [2021-01-20 11:32:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-20 11:32:52,284 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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 48 [2021-01-20 11:32:52,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:52,297 INFO L225 Difference]: With dead ends: 12930 [2021-01-20 11:32:52,297 INFO L226 Difference]: Without dead ends: 12132 [2021-01-20 11:32:52,298 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=598, Invalid=2264, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 11:32:52,298 INFO L78 Accepts]: Start accepts. Automaton has 12132 states. Word has length 48 [2021-01-20 11:32:52,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:52,299 INFO L481 AbstractCegarLoop]: Abstraction has 12132 states. [2021-01-20 11:32:52,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 11:32:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 12132 states. [2021-01-20 11:32:52,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:52,315 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:52,315 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:52,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:52,525 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:52,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:52,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1376333259, now seen corresponding path program 5 times [2021-01-20 11:32:52,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:52,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239523692] [2021-01-20 11:32:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:52,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239523692] [2021-01-20 11:32:52,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68478357] [2021-01-20 11:32:52,689 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:52,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:32:52,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:52,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:52,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:52,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:52,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:52,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:32:52,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870418662] [2021-01-20 11:32:52,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:32:52,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:52,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:32:52,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:32:52,975 INFO L87 Difference]: Start difference. First operand 12132 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:53,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:53,285 INFO L93 Difference]: Finished difference Result 12324 states and 28703 transitions. [2021-01-20 11:32:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 11:32:53,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:32:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:53,299 INFO L225 Difference]: With dead ends: 12324 [2021-01-20 11:32:53,299 INFO L226 Difference]: Without dead ends: 12172 [2021-01-20 11:32:53,299 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-01-20 11:32:53,299 INFO L78 Accepts]: Start accepts. Automaton has 12172 states. Word has length 53 [2021-01-20 11:32:53,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:53,300 INFO L481 AbstractCegarLoop]: Abstraction has 12172 states. [2021-01-20 11:32:53,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 12172 states. [2021-01-20 11:32:53,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:53,398 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:53,398 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:53,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-20 11:32:53,599 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:53,600 INFO L82 PathProgramCache]: Analyzing trace with hash 372366749, now seen corresponding path program 6 times [2021-01-20 11:32:53,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:53,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084528607] [2021-01-20 11:32:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:53,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084528607] [2021-01-20 11:32:53,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473661044] [2021-01-20 11:32:53,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:53,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:32:53,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:53,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:53,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:53,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:54,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:54,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:54,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:32:54,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055060578] [2021-01-20 11:32:54,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:32:54,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:54,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:32:54,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:32:54,076 INFO L87 Difference]: Start difference. First operand 12172 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:54,834 INFO L93 Difference]: Finished difference Result 12956 states and 30351 transitions. [2021-01-20 11:32:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:32:54,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:32:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:54,848 INFO L225 Difference]: With dead ends: 12956 [2021-01-20 11:32:54,849 INFO L226 Difference]: Without dead ends: 12592 [2021-01-20 11:32:54,849 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 11:32:54,849 INFO L78 Accepts]: Start accepts. Automaton has 12592 states. Word has length 53 [2021-01-20 11:32:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:54,850 INFO L481 AbstractCegarLoop]: Abstraction has 12592 states. [2021-01-20 11:32:54,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:54,850 INFO L276 IsEmpty]: Start isEmpty. Operand 12592 states. [2021-01-20 11:32:54,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:54,860 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:54,861 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:55,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-20 11:32:55,063 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:55,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:55,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1523808235, now seen corresponding path program 8 times [2021-01-20 11:32:55,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:55,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083724795] [2021-01-20 11:32:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:55,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083724795] [2021-01-20 11:32:55,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884779163] [2021-01-20 11:32:55,231 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:55,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:55,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:55,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:55,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:55,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:55,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:55,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:32:55,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756676878] [2021-01-20 11:32:55,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:32:55,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:55,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:32:55,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:32:55,541 INFO L87 Difference]: Start difference. First operand 12592 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:56,070 INFO L93 Difference]: Finished difference Result 12904 states and 30053 transitions. [2021-01-20 11:32:56,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 11:32:56,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:32:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:56,085 INFO L225 Difference]: With dead ends: 12904 [2021-01-20 11:32:56,085 INFO L226 Difference]: Without dead ends: 12752 [2021-01-20 11:32:56,085 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-01-20 11:32:56,085 INFO L78 Accepts]: Start accepts. Automaton has 12752 states. Word has length 53 [2021-01-20 11:32:56,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:56,086 INFO L481 AbstractCegarLoop]: Abstraction has 12752 states. [2021-01-20 11:32:56,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand 12752 states. [2021-01-20 11:32:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:56,097 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:56,097 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:56,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-20 11:32:56,298 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:56,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:56,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1287659999, now seen corresponding path program 9 times [2021-01-20 11:32:56,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:56,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288360181] [2021-01-20 11:32:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:56,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288360181] [2021-01-20 11:32:56,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171755741] [2021-01-20 11:32:56,556 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:56,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:32:56,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:56,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:56,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:56,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:56,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:56,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:32:56,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489351620] [2021-01-20 11:32:56,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:32:56,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:56,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:32:56,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:32:56,876 INFO L87 Difference]: Start difference. First operand 12752 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:57,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:57,513 INFO L93 Difference]: Finished difference Result 12944 states and 30133 transitions. [2021-01-20 11:32:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:32:57,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:32:57,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:57,527 INFO L225 Difference]: With dead ends: 12944 [2021-01-20 11:32:57,527 INFO L226 Difference]: Without dead ends: 12792 [2021-01-20 11:32:57,527 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 11:32:57,528 INFO L78 Accepts]: Start accepts. Automaton has 12792 states. Word has length 53 [2021-01-20 11:32:57,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:57,528 INFO L481 AbstractCegarLoop]: Abstraction has 12792 states. [2021-01-20 11:32:57,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:57,528 INFO L276 IsEmpty]: Start isEmpty. Operand 12792 states. [2021-01-20 11:32:57,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:57,541 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:57,541 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:57,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-20 11:32:57,755 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:57,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:57,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1715777465, now seen corresponding path program 10 times [2021-01-20 11:32:57,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:57,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300292465] [2021-01-20 11:32:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:57,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300292465] [2021-01-20 11:32:57,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899428855] [2021-01-20 11:32:57,941 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:58,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:32:58,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:58,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:32:58,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:58,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:58,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:58,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:58,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:58,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:58,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:32:58,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767161952] [2021-01-20 11:32:58,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:32:58,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:58,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:32:58,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:32:58,311 INFO L87 Difference]: Start difference. First operand 12792 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:59,779 INFO L93 Difference]: Finished difference Result 14302 states and 33456 transitions. [2021-01-20 11:32:59,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:32:59,780 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:32:59,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:59,797 INFO L225 Difference]: With dead ends: 14302 [2021-01-20 11:32:59,797 INFO L226 Difference]: Without dead ends: 13762 [2021-01-20 11:32:59,798 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=483, Invalid=1869, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 11:32:59,798 INFO L78 Accepts]: Start accepts. Automaton has 13762 states. Word has length 53 [2021-01-20 11:32:59,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:59,798 INFO L481 AbstractCegarLoop]: Abstraction has 13762 states. [2021-01-20 11:32:59,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:59,798 INFO L276 IsEmpty]: Start isEmpty. Operand 13762 states. [2021-01-20 11:32:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:59,813 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:59,813 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:00,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-20 11:33:00,027 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:00,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:00,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1870495507, now seen corresponding path program 11 times [2021-01-20 11:33:00,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:00,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24855802] [2021-01-20 11:33:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:00,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24855802] [2021-01-20 11:33:00,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336208432] [2021-01-20 11:33:00,207 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:00,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:33:00,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:00,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:00,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:00,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:00,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:00,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:00,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:00,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:00,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983939595] [2021-01-20 11:33:00,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:00,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:00,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:00,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:00,626 INFO L87 Difference]: Start difference. First operand 13762 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:01,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:01,351 INFO L93 Difference]: Finished difference Result 14514 states and 33558 transitions. [2021-01-20 11:33:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 11:33:01,352 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:01,371 INFO L225 Difference]: With dead ends: 14514 [2021-01-20 11:33:01,372 INFO L226 Difference]: Without dead ends: 14362 [2021-01-20 11:33:01,372 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 11:33:01,372 INFO L78 Accepts]: Start accepts. Automaton has 14362 states. Word has length 53 [2021-01-20 11:33:01,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:01,373 INFO L481 AbstractCegarLoop]: Abstraction has 14362 states. [2021-01-20 11:33:01,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:01,373 INFO L276 IsEmpty]: Start isEmpty. Operand 14362 states. [2021-01-20 11:33:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:01,385 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:01,385 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:01,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:01,586 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:01,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:01,587 INFO L82 PathProgramCache]: Analyzing trace with hash 601156231, now seen corresponding path program 12 times [2021-01-20 11:33:01,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:01,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644105724] [2021-01-20 11:33:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:01,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644105724] [2021-01-20 11:33:01,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807083035] [2021-01-20 11:33:01,749 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:01,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:33:01,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:01,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:01,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:02,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:02,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:02,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:02,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:02,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:02,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427195441] [2021-01-20 11:33:02,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:02,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:02,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:02,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:02,151 INFO L87 Difference]: Start difference. First operand 14362 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:03,059 INFO L93 Difference]: Finished difference Result 14834 states and 34198 transitions. [2021-01-20 11:33:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:33:03,060 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:03,079 INFO L225 Difference]: With dead ends: 14834 [2021-01-20 11:33:03,079 INFO L226 Difference]: Without dead ends: 14682 [2021-01-20 11:33:03,080 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:33:03,080 INFO L78 Accepts]: Start accepts. Automaton has 14682 states. Word has length 53 [2021-01-20 11:33:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:03,080 INFO L481 AbstractCegarLoop]: Abstraction has 14682 states. [2021-01-20 11:33:03,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 14682 states. [2021-01-20 11:33:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:03,203 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:03,203 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:03,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:03,412 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:03,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1971730201, now seen corresponding path program 13 times [2021-01-20 11:33:03,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:03,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853492623] [2021-01-20 11:33:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:03,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853492623] [2021-01-20 11:33:03,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585011611] [2021-01-20 11:33:03,569 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:03,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:03,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:03,871 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:03,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:03,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:03,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:03,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:03,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557665904] [2021-01-20 11:33:03,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:03,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:03,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:03,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:03,923 INFO L87 Difference]: Start difference. First operand 14682 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:04,926 INFO L93 Difference]: Finished difference Result 15234 states and 34998 transitions. [2021-01-20 11:33:04,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:33:04,926 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:04,942 INFO L225 Difference]: With dead ends: 15234 [2021-01-20 11:33:04,943 INFO L226 Difference]: Without dead ends: 15082 [2021-01-20 11:33:04,944 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=358, Invalid=1202, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:33:04,944 INFO L78 Accepts]: Start accepts. Automaton has 15082 states. Word has length 53 [2021-01-20 11:33:04,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:04,944 INFO L481 AbstractCegarLoop]: Abstraction has 15082 states. [2021-01-20 11:33:04,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:04,944 INFO L276 IsEmpty]: Start isEmpty. Operand 15082 states. [2021-01-20 11:33:04,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:04,958 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:04,958 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:05,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:05,166 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:05,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:05,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1215729429, now seen corresponding path program 14 times [2021-01-20 11:33:05,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:05,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220061583] [2021-01-20 11:33:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:05,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220061583] [2021-01-20 11:33:05,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264602995] [2021-01-20 11:33:05,332 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:05,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:05,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:05,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:05,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:05,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:05,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:05,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:05,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:05,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395555649] [2021-01-20 11:33:05,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:05,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:05,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:05,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:05,725 INFO L87 Difference]: Start difference. First operand 15082 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:07,760 INFO L93 Difference]: Finished difference Result 16912 states and 38961 transitions. [2021-01-20 11:33:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 11:33:07,760 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:07,778 INFO L225 Difference]: With dead ends: 16912 [2021-01-20 11:33:07,779 INFO L226 Difference]: Without dead ends: 16372 [2021-01-20 11:33:07,780 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=637, Invalid=2333, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 11:33:07,780 INFO L78 Accepts]: Start accepts. Automaton has 16372 states. Word has length 53 [2021-01-20 11:33:07,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:07,780 INFO L481 AbstractCegarLoop]: Abstraction has 16372 states. [2021-01-20 11:33:07,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 16372 states. [2021-01-20 11:33:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:07,793 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:07,793 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:07,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-20 11:33:07,996 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:07,997 INFO L82 PathProgramCache]: Analyzing trace with hash 680245205, now seen corresponding path program 15 times [2021-01-20 11:33:07,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:07,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286357241] [2021-01-20 11:33:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:08,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286357241] [2021-01-20 11:33:08,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691152510] [2021-01-20 11:33:08,167 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:08,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:33:08,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:08,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:08,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:08,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:08,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:08,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:08,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628310090] [2021-01-20 11:33:08,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:08,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:08,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:08,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:08,461 INFO L87 Difference]: Start difference. First operand 16372 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:09,142 INFO L93 Difference]: Finished difference Result 16844 states and 38503 transitions. [2021-01-20 11:33:09,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 11:33:09,143 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:09,165 INFO L225 Difference]: With dead ends: 16844 [2021-01-20 11:33:09,165 INFO L226 Difference]: Without dead ends: 16692 [2021-01-20 11:33:09,166 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 11:33:09,166 INFO L78 Accepts]: Start accepts. Automaton has 16692 states. Word has length 53 [2021-01-20 11:33:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:09,166 INFO L481 AbstractCegarLoop]: Abstraction has 16692 states. [2021-01-20 11:33:09,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 16692 states. [2021-01-20 11:33:09,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:09,181 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:09,181 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:09,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:09,396 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:09,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash 409323335, now seen corresponding path program 16 times [2021-01-20 11:33:09,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:09,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562543044] [2021-01-20 11:33:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:09,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562543044] [2021-01-20 11:33:09,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763656681] [2021-01-20 11:33:09,557 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:09,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:09,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:09,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:33:09,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:09,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:09,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:09,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:09,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281620312] [2021-01-20 11:33:09,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:09,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:09,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:09,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:09,863 INFO L87 Difference]: Start difference. First operand 16692 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:10,729 INFO L93 Difference]: Finished difference Result 17364 states and 39671 transitions. [2021-01-20 11:33:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 11:33:10,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:10,749 INFO L225 Difference]: With dead ends: 17364 [2021-01-20 11:33:10,750 INFO L226 Difference]: Without dead ends: 16972 [2021-01-20 11:33:10,750 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:33:10,750 INFO L78 Accepts]: Start accepts. Automaton has 16972 states. Word has length 53 [2021-01-20 11:33:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:10,750 INFO L481 AbstractCegarLoop]: Abstraction has 16972 states. [2021-01-20 11:33:10,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:10,751 INFO L276 IsEmpty]: Start isEmpty. Operand 16972 states. [2021-01-20 11:33:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:10,856 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:10,856 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:11,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-20 11:33:11,057 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:11,059 INFO L82 PathProgramCache]: Analyzing trace with hash -284076831, now seen corresponding path program 17 times [2021-01-20 11:33:11,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:11,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471355065] [2021-01-20 11:33:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:11,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471355065] [2021-01-20 11:33:11,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528857718] [2021-01-20 11:33:11,219 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:11,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:33:11,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:11,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:11,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:11,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:11,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:11,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308117523] [2021-01-20 11:33:11,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:11,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:11,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:11,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:11,530 INFO L87 Difference]: Start difference. First operand 16972 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:12,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:12,405 INFO L93 Difference]: Finished difference Result 17524 states and 39863 transitions. [2021-01-20 11:33:12,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 11:33:12,405 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:12,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:12,422 INFO L225 Difference]: With dead ends: 17524 [2021-01-20 11:33:12,423 INFO L226 Difference]: Without dead ends: 17372 [2021-01-20 11:33:12,423 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=337, Invalid=1145, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 11:33:12,423 INFO L78 Accepts]: Start accepts. Automaton has 17372 states. Word has length 53 [2021-01-20 11:33:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:12,424 INFO L481 AbstractCegarLoop]: Abstraction has 17372 states. [2021-01-20 11:33:12,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:12,424 INFO L276 IsEmpty]: Start isEmpty. Operand 17372 states. [2021-01-20 11:33:12,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:12,438 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:12,438 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:12,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:12,653 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:12,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:12,653 INFO L82 PathProgramCache]: Analyzing trace with hash -554998701, now seen corresponding path program 18 times [2021-01-20 11:33:12,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:12,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493909004] [2021-01-20 11:33:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:12,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493909004] [2021-01-20 11:33:12,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516846967] [2021-01-20 11:33:12,815 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:12,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:33:12,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:12,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:12,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:13,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:13,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:13,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:13,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193648868] [2021-01-20 11:33:13,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:13,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:13,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:13,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:13,144 INFO L87 Difference]: Start difference. First operand 17372 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:14,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:14,368 INFO L93 Difference]: Finished difference Result 18284 states and 41511 transitions. [2021-01-20 11:33:14,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:33:14,369 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:14,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:14,394 INFO L225 Difference]: With dead ends: 18284 [2021-01-20 11:33:14,394 INFO L226 Difference]: Without dead ends: 17892 [2021-01-20 11:33:14,395 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=410, Invalid=1482, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 11:33:14,395 INFO L78 Accepts]: Start accepts. Automaton has 17892 states. Word has length 53 [2021-01-20 11:33:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:14,396 INFO L481 AbstractCegarLoop]: Abstraction has 17892 states. [2021-01-20 11:33:14,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:14,396 INFO L276 IsEmpty]: Start isEmpty. Operand 17892 states. [2021-01-20 11:33:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:14,414 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:14,415 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:14,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-20 11:33:14,627 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:14,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:14,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2036829567, now seen corresponding path program 19 times [2021-01-20 11:33:14,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:14,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347334435] [2021-01-20 11:33:14,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:14,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347334435] [2021-01-20 11:33:14,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443668349] [2021-01-20 11:33:14,792 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:14,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:14,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:15,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:15,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:15,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:15,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743818307] [2021-01-20 11:33:15,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:15,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:15,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:15,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:15,107 INFO L87 Difference]: Start difference. First operand 17892 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:16,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:16,297 INFO L93 Difference]: Finished difference Result 18284 states and 41383 transitions. [2021-01-20 11:33:16,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:33:16,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:16,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:16,318 INFO L225 Difference]: With dead ends: 18284 [2021-01-20 11:33:16,319 INFO L226 Difference]: Without dead ends: 18132 [2021-01-20 11:33:16,319 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:33:16,319 INFO L78 Accepts]: Start accepts. Automaton has 18132 states. Word has length 53 [2021-01-20 11:33:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:16,320 INFO L481 AbstractCegarLoop]: Abstraction has 18132 states. [2021-01-20 11:33:16,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 18132 states. [2021-01-20 11:33:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:16,335 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:16,335 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:16,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:16,536 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:16,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1606714029, now seen corresponding path program 20 times [2021-01-20 11:33:16,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:16,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132287400] [2021-01-20 11:33:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:16,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132287400] [2021-01-20 11:33:16,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231504854] [2021-01-20 11:33:16,723 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:16,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:16,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:16,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:16,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:17,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:17,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:17,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:17,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2185233] [2021-01-20 11:33:17,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:17,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:17,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:17,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:17,053 INFO L87 Difference]: Start difference. First operand 18132 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:18,129 INFO L93 Difference]: Finished difference Result 18854 states and 42808 transitions. [2021-01-20 11:33:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:33:18,130 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:18,170 INFO L225 Difference]: With dead ends: 18854 [2021-01-20 11:33:18,170 INFO L226 Difference]: Without dead ends: 18702 [2021-01-20 11:33:18,171 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=410, Invalid=1312, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 11:33:18,172 INFO L78 Accepts]: Start accepts. Automaton has 18702 states. Word has length 53 [2021-01-20 11:33:18,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:18,172 INFO L481 AbstractCegarLoop]: Abstraction has 18702 states. [2021-01-20 11:33:18,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:18,173 INFO L276 IsEmpty]: Start isEmpty. Operand 18702 states. [2021-01-20 11:33:18,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:18,197 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:18,198 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:18,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-20 11:33:18,411 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:18,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1932252495, now seen corresponding path program 21 times [2021-01-20 11:33:18,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:18,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949209572] [2021-01-20 11:33:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:18,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949209572] [2021-01-20 11:33:18,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480611959] [2021-01-20 11:33:18,590 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:18,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:33:18,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:18,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:18,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:18,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:19,001 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:19,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:19,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:19,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826320178] [2021-01-20 11:33:19,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:19,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:19,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:19,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:19,040 INFO L87 Difference]: Start difference. First operand 18702 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:20,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:20,955 INFO L93 Difference]: Finished difference Result 21900 states and 49763 transitions. [2021-01-20 11:33:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-20 11:33:20,956 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:20,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:20,978 INFO L225 Difference]: With dead ends: 21900 [2021-01-20 11:33:20,979 INFO L226 Difference]: Without dead ends: 21102 [2021-01-20 11:33:20,980 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=776, Invalid=3006, Unknown=0, NotChecked=0, Total=3782 [2021-01-20 11:33:20,980 INFO L78 Accepts]: Start accepts. Automaton has 21102 states. Word has length 53 [2021-01-20 11:33:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:20,980 INFO L481 AbstractCegarLoop]: Abstraction has 21102 states. [2021-01-20 11:33:20,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 21102 states. [2021-01-20 11:33:20,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:20,998 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:20,998 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:21,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-20 11:33:21,214 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:21,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:21,216 INFO L82 PathProgramCache]: Analyzing trace with hash 75989787, now seen corresponding path program 22 times [2021-01-20 11:33:21,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:21,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116455144] [2021-01-20 11:33:21,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:21,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116455144] [2021-01-20 11:33:21,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136998271] [2021-01-20 11:33:21,387 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:21,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:21,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:21,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:33:21,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:21,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:21,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:21,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:21,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011644294] [2021-01-20 11:33:21,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:21,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:21,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:21,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:21,700 INFO L87 Difference]: Start difference. First operand 21102 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:23,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:23,177 INFO L93 Difference]: Finished difference Result 21734 states and 48948 transitions. [2021-01-20 11:33:23,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 11:33:23,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:23,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:23,214 INFO L225 Difference]: With dead ends: 21734 [2021-01-20 11:33:23,214 INFO L226 Difference]: Without dead ends: 21582 [2021-01-20 11:33:23,216 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=533, Invalid=1723, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:33:23,216 INFO L78 Accepts]: Start accepts. Automaton has 21582 states. Word has length 53 [2021-01-20 11:33:23,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:23,216 INFO L481 AbstractCegarLoop]: Abstraction has 21582 states. [2021-01-20 11:33:23,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:23,217 INFO L276 IsEmpty]: Start isEmpty. Operand 21582 states. [2021-01-20 11:33:23,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:23,239 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:23,239 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:23,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-20 11:33:23,454 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:23,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:23,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1798070651, now seen corresponding path program 23 times [2021-01-20 11:33:23,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:23,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874687000] [2021-01-20 11:33:23,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:23,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874687000] [2021-01-20 11:33:23,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969250860] [2021-01-20 11:33:23,620 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:23,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:33:23,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:23,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:23,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:23,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:23,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:23,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:23,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690947933] [2021-01-20 11:33:23,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:23,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:23,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:23,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:23,921 INFO L87 Difference]: Start difference. First operand 21582 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:25,231 INFO L93 Difference]: Finished difference Result 22644 states and 50863 transitions. [2021-01-20 11:33:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 11:33:25,231 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:25,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:25,254 INFO L225 Difference]: With dead ends: 22644 [2021-01-20 11:33:25,254 INFO L226 Difference]: Without dead ends: 22492 [2021-01-20 11:33:25,255 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:33:25,255 INFO L78 Accepts]: Start accepts. Automaton has 22492 states. Word has length 53 [2021-01-20 11:33:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:25,255 INFO L481 AbstractCegarLoop]: Abstraction has 22492 states. [2021-01-20 11:33:25,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 22492 states. [2021-01-20 11:33:25,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:25,268 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:25,268 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:25,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-20 11:33:25,469 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:25,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:25,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1740895873, now seen corresponding path program 24 times [2021-01-20 11:33:25,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:25,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64064976] [2021-01-20 11:33:25,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:25,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64064976] [2021-01-20 11:33:25,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67574236] [2021-01-20 11:33:25,633 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:25,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:33:25,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:25,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:25,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:25,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:25,979 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:26,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:26,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:26,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969972318] [2021-01-20 11:33:26,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:26,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:26,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:26,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:26,017 INFO L87 Difference]: Start difference. First operand 22492 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:27,297 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2021-01-20 11:33:28,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:28,582 INFO L93 Difference]: Finished difference Result 26370 states and 59558 transitions. [2021-01-20 11:33:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-20 11:33:28,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:28,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:28,612 INFO L225 Difference]: With dead ends: 26370 [2021-01-20 11:33:28,613 INFO L226 Difference]: Without dead ends: 25572 [2021-01-20 11:33:28,614 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=883, Invalid=3277, Unknown=0, NotChecked=0, Total=4160 [2021-01-20 11:33:28,614 INFO L78 Accepts]: Start accepts. Automaton has 25572 states. Word has length 53 [2021-01-20 11:33:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:28,614 INFO L481 AbstractCegarLoop]: Abstraction has 25572 states. [2021-01-20 11:33:28,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 25572 states. [2021-01-20 11:33:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:28,630 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:28,630 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:28,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:28,844 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:28,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:28,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1299793979, now seen corresponding path program 25 times [2021-01-20 11:33:28,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:28,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210820148] [2021-01-20 11:33:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:29,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210820148] [2021-01-20 11:33:29,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512365090] [2021-01-20 11:33:29,023 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:29,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:29,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:29,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:29,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:29,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:29,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502410106] [2021-01-20 11:33:29,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:29,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:29,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:29,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:29,328 INFO L87 Difference]: Start difference. First operand 25572 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:29,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:29,904 INFO L93 Difference]: Finished difference Result 26604 states and 59543 transitions. [2021-01-20 11:33:29,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 11:33:29,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:29,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:29,935 INFO L225 Difference]: With dead ends: 26604 [2021-01-20 11:33:29,935 INFO L226 Difference]: Without dead ends: 26452 [2021-01-20 11:33:29,935 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-01-20 11:33:29,936 INFO L78 Accepts]: Start accepts. Automaton has 26452 states. Word has length 53 [2021-01-20 11:33:29,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:29,936 INFO L481 AbstractCegarLoop]: Abstraction has 26452 states. [2021-01-20 11:33:29,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 26452 states. [2021-01-20 11:33:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:29,952 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:29,952 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:30,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-20 11:33:30,156 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash 880108089, now seen corresponding path program 26 times [2021-01-20 11:33:30,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:30,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753386956] [2021-01-20 11:33:30,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:30,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753386956] [2021-01-20 11:33:30,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709327035] [2021-01-20 11:33:30,319 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:30,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:30,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:30,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:30,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:30,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:30,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:30,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:30,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131282941] [2021-01-20 11:33:30,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:30,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:30,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:30,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:30,625 INFO L87 Difference]: Start difference. First operand 26452 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:31,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:31,662 INFO L93 Difference]: Finished difference Result 27404 states and 61143 transitions. [2021-01-20 11:33:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 11:33:31,663 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:31,695 INFO L225 Difference]: With dead ends: 27404 [2021-01-20 11:33:31,695 INFO L226 Difference]: Without dead ends: 27252 [2021-01-20 11:33:31,696 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 11:33:31,696 INFO L78 Accepts]: Start accepts. Automaton has 27252 states. Word has length 53 [2021-01-20 11:33:31,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:31,696 INFO L481 AbstractCegarLoop]: Abstraction has 27252 states. [2021-01-20 11:33:31,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:31,696 INFO L276 IsEmpty]: Start isEmpty. Operand 27252 states. [2021-01-20 11:33:31,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:31,714 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:31,714 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:31,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-20 11:33:31,928 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:31,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:31,929 INFO L82 PathProgramCache]: Analyzing trace with hash -958412647, now seen corresponding path program 27 times [2021-01-20 11:33:31,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:31,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286801162] [2021-01-20 11:33:31,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:32,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286801162] [2021-01-20 11:33:32,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076192704] [2021-01-20 11:33:32,125 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:32,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 11:33:32,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:32,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:32,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:32,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:32,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:32,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:32,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559787980] [2021-01-20 11:33:32,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:32,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:32,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:32,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:32,445 INFO L87 Difference]: Start difference. First operand 27252 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:33,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:33,313 INFO L93 Difference]: Finished difference Result 27484 states and 61303 transitions. [2021-01-20 11:33:33,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:33:33,314 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:33,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:33,344 INFO L225 Difference]: With dead ends: 27484 [2021-01-20 11:33:33,345 INFO L226 Difference]: Without dead ends: 27332 [2021-01-20 11:33:33,345 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 11:33:33,345 INFO L78 Accepts]: Start accepts. Automaton has 27332 states. Word has length 53 [2021-01-20 11:33:33,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:33,345 INFO L481 AbstractCegarLoop]: Abstraction has 27332 states. [2021-01-20 11:33:33,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:33,346 INFO L276 IsEmpty]: Start isEmpty. Operand 27332 states. [2021-01-20 11:33:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:33,359 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:33,359 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:33,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:33,560 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash -270011115, now seen corresponding path program 28 times [2021-01-20 11:33:33,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:33,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469996954] [2021-01-20 11:33:33,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:33,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469996954] [2021-01-20 11:33:33,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88758683] [2021-01-20 11:33:33,724 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:33,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:33,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:33,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:33:33,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:33,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:34,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:34,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:34,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155674719] [2021-01-20 11:33:34,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:34,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:34,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:34,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:34,005 INFO L87 Difference]: Start difference. First operand 27332 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:35,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:35,022 INFO L93 Difference]: Finished difference Result 27524 states and 61383 transitions. [2021-01-20 11:33:35,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:33:35,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:35,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:35,054 INFO L225 Difference]: With dead ends: 27524 [2021-01-20 11:33:35,054 INFO L226 Difference]: Without dead ends: 27372 [2021-01-20 11:33:35,054 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=1063, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:33:35,054 INFO L78 Accepts]: Start accepts. Automaton has 27372 states. Word has length 53 [2021-01-20 11:33:35,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:35,054 INFO L481 AbstractCegarLoop]: Abstraction has 27372 states. [2021-01-20 11:33:35,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:35,055 INFO L276 IsEmpty]: Start isEmpty. Operand 27372 states. [2021-01-20 11:33:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:35,069 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:35,069 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:35,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-20 11:33:35,270 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:35,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:35,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1452069749, now seen corresponding path program 29 times [2021-01-20 11:33:35,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:35,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783469154] [2021-01-20 11:33:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:35,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783469154] [2021-01-20 11:33:35,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976864331] [2021-01-20 11:33:35,420 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:35,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:35,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:35,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:35,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:35,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:35,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:35,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:35,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992104586] [2021-01-20 11:33:35,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:35,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:35,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:35,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:35,742 INFO L87 Difference]: Start difference. First operand 27372 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:36,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:36,822 INFO L93 Difference]: Finished difference Result 27914 states and 62258 transitions. [2021-01-20 11:33:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:33:36,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:36,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:36,857 INFO L225 Difference]: With dead ends: 27914 [2021-01-20 11:33:36,857 INFO L226 Difference]: Without dead ends: 27762 [2021-01-20 11:33:36,857 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=360, Invalid=1122, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 11:33:36,857 INFO L78 Accepts]: Start accepts. Automaton has 27762 states. Word has length 53 [2021-01-20 11:33:36,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:36,858 INFO L481 AbstractCegarLoop]: Abstraction has 27762 states. [2021-01-20 11:33:36,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 27762 states. [2021-01-20 11:33:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:36,872 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:36,872 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:37,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:37,073 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:37,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2086896775, now seen corresponding path program 30 times [2021-01-20 11:33:37,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:37,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149710268] [2021-01-20 11:33:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:37,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149710268] [2021-01-20 11:33:37,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259717423] [2021-01-20 11:33:37,234 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:37,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-20 11:33:37,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:37,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:37,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:37,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:37,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:37,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:37,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:37,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211752485] [2021-01-20 11:33:37,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:37,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:37,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:37,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:37,581 INFO L87 Difference]: Start difference. First operand 27762 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:39,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:39,262 INFO L93 Difference]: Finished difference Result 29902 states and 66936 transitions. [2021-01-20 11:33:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 11:33:39,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:39,293 INFO L225 Difference]: With dead ends: 29902 [2021-01-20 11:33:39,293 INFO L226 Difference]: Without dead ends: 29362 [2021-01-20 11:33:39,294 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=681, Invalid=2399, Unknown=0, NotChecked=0, Total=3080 [2021-01-20 11:33:39,294 INFO L78 Accepts]: Start accepts. Automaton has 29362 states. Word has length 53 [2021-01-20 11:33:39,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:39,294 INFO L481 AbstractCegarLoop]: Abstraction has 29362 states. [2021-01-20 11:33:39,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:39,294 INFO L276 IsEmpty]: Start isEmpty. Operand 29362 states. [2021-01-20 11:33:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:39,315 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:39,315 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 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, 1] [2021-01-20 11:33:39,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-20 11:33:39,516 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:39,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:39,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2038569245, now seen corresponding path program 3 times [2021-01-20 11:33:39,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:39,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518774881] [2021-01-20 11:33:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:39,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518774881] [2021-01-20 11:33:39,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765607387] [2021-01-20 11:33:39,754 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:39,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 11:33:39,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:39,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:39,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:40,030 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:40,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:40,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:40,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:40,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649659527] [2021-01-20 11:33:40,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:40,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:40,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:40,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:40,073 INFO L87 Difference]: Start difference. First operand 29362 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:40,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:40,750 INFO L93 Difference]: Finished difference Result 30594 states and 68382 transitions. [2021-01-20 11:33:40,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 11:33:40,751 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:40,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:40,785 INFO L225 Difference]: With dead ends: 30594 [2021-01-20 11:33:40,785 INFO L226 Difference]: Without dead ends: 30230 [2021-01-20 11:33:40,785 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 11:33:40,785 INFO L78 Accepts]: Start accepts. Automaton has 30230 states. Word has length 58 [2021-01-20 11:33:40,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:40,786 INFO L481 AbstractCegarLoop]: Abstraction has 30230 states. [2021-01-20 11:33:40,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:40,786 INFO L276 IsEmpty]: Start isEmpty. Operand 30230 states. [2021-01-20 11:33:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:40,807 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:40,807 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:41,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-20 11:33:41,008 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:41,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1808185776, now seen corresponding path program 7 times [2021-01-20 11:33:41,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:41,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799294474] [2021-01-20 11:33:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:41,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799294474] [2021-01-20 11:33:41,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666700991] [2021-01-20 11:33:41,192 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:41,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:41,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:41,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:41,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:41,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:41,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100004006] [2021-01-20 11:33:41,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:41,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:41,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:41,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:41,534 INFO L87 Difference]: Start difference. First operand 30230 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:42,011 INFO L93 Difference]: Finished difference Result 30422 states and 67844 transitions. [2021-01-20 11:33:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 11:33:42,012 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:42,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:42,153 INFO L225 Difference]: With dead ends: 30422 [2021-01-20 11:33:42,153 INFO L226 Difference]: Without dead ends: 30270 [2021-01-20 11:33:42,154 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-01-20 11:33:42,154 INFO L78 Accepts]: Start accepts. Automaton has 30270 states. Word has length 58 [2021-01-20 11:33:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:42,154 INFO L481 AbstractCegarLoop]: Abstraction has 30270 states. [2021-01-20 11:33:42,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 30270 states. [2021-01-20 11:33:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:42,173 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:42,174 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:42,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-20 11:33:42,375 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:42,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:42,375 INFO L82 PathProgramCache]: Analyzing trace with hash 804219266, now seen corresponding path program 8 times [2021-01-20 11:33:42,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:42,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450721918] [2021-01-20 11:33:42,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:42,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450721918] [2021-01-20 11:33:42,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448609994] [2021-01-20 11:33:42,555 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:42,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:42,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:42,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:42,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:42,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:42,868 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:42,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:42,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:33:42,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076920491] [2021-01-20 11:33:42,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:33:42,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:42,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:33:42,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:33:42,879 INFO L87 Difference]: Start difference. First operand 30270 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:43,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:43,918 INFO L93 Difference]: Finished difference Result 31134 states and 69652 transitions. [2021-01-20 11:33:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:33:43,920 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:43,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:43,958 INFO L225 Difference]: With dead ends: 31134 [2021-01-20 11:33:43,958 INFO L226 Difference]: Without dead ends: 30770 [2021-01-20 11:33:43,959 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=346, Invalid=1214, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:33:43,959 INFO L78 Accepts]: Start accepts. Automaton has 30770 states. Word has length 58 [2021-01-20 11:33:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:43,959 INFO L481 AbstractCegarLoop]: Abstraction has 30770 states. [2021-01-20 11:33:43,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 30770 states. [2021-01-20 11:33:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:43,985 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:43,985 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:44,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-01-20 11:33:44,186 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:44,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:44,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1091955718, now seen corresponding path program 31 times [2021-01-20 11:33:44,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:44,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103194293] [2021-01-20 11:33:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:44,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103194293] [2021-01-20 11:33:44,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862049822] [2021-01-20 11:33:44,373 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:44,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:44,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:44,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:44,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:44,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:44,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884657305] [2021-01-20 11:33:44,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:44,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:44,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:44,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:44,731 INFO L87 Difference]: Start difference. First operand 30770 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:45,473 INFO L93 Difference]: Finished difference Result 31082 states and 69354 transitions. [2021-01-20 11:33:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:33:45,473 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:45,506 INFO L225 Difference]: With dead ends: 31082 [2021-01-20 11:33:45,506 INFO L226 Difference]: Without dead ends: 30930 [2021-01-20 11:33:45,507 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 11:33:45,507 INFO L78 Accepts]: Start accepts. Automaton has 30930 states. Word has length 58 [2021-01-20 11:33:45,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:45,507 INFO L481 AbstractCegarLoop]: Abstraction has 30930 states. [2021-01-20 11:33:45,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:45,507 INFO L276 IsEmpty]: Start isEmpty. Operand 30930 states. [2021-01-20 11:33:45,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:45,537 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:45,538 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:45,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:45,752 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:45,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:45,752 INFO L82 PathProgramCache]: Analyzing trace with hash -855807482, now seen corresponding path program 32 times [2021-01-20 11:33:45,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:45,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636981064] [2021-01-20 11:33:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:46,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636981064] [2021-01-20 11:33:46,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217254916] [2021-01-20 11:33:46,051 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:46,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:46,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:46,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:46,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:46,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:46,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:46,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:46,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051654579] [2021-01-20 11:33:46,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:46,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:46,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:46,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:46,470 INFO L87 Difference]: Start difference. First operand 30930 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:47,392 INFO L93 Difference]: Finished difference Result 31122 states and 69434 transitions. [2021-01-20 11:33:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:33:47,393 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:47,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:47,429 INFO L225 Difference]: With dead ends: 31122 [2021-01-20 11:33:47,429 INFO L226 Difference]: Without dead ends: 30970 [2021-01-20 11:33:47,429 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:33:47,429 INFO L78 Accepts]: Start accepts. Automaton has 30970 states. Word has length 58 [2021-01-20 11:33:47,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:47,430 INFO L481 AbstractCegarLoop]: Abstraction has 30970 states. [2021-01-20 11:33:47,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 30970 states. [2021-01-20 11:33:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:47,457 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:47,457 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:47,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-20 11:33:47,658 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1283924948, now seen corresponding path program 33 times [2021-01-20 11:33:47,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:47,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438017509] [2021-01-20 11:33:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:47,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438017509] [2021-01-20 11:33:47,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707120868] [2021-01-20 11:33:47,886 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:47,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:33:47,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:47,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:47,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:48,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:48,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:48,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:48,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:33:48,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383557866] [2021-01-20 11:33:48,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:33:48,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:48,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:33:48,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:33:48,341 INFO L87 Difference]: Start difference. First operand 30970 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:49,582 INFO L93 Difference]: Finished difference Result 32484 states and 72827 transitions. [2021-01-20 11:33:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 11:33:49,583 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:49,619 INFO L225 Difference]: With dead ends: 32484 [2021-01-20 11:33:49,619 INFO L226 Difference]: Without dead ends: 32120 [2021-01-20 11:33:49,620 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=471, Invalid=1691, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 11:33:49,620 INFO L78 Accepts]: Start accepts. Automaton has 32120 states. Word has length 58 [2021-01-20 11:33:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:49,620 INFO L481 AbstractCegarLoop]: Abstraction has 32120 states. [2021-01-20 11:33:49,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 32120 states. [2021-01-20 11:33:49,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:49,643 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:49,643 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:49,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:49,844 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:49,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1992619272, now seen corresponding path program 34 times [2021-01-20 11:33:49,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:49,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770261473] [2021-01-20 11:33:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:50,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770261473] [2021-01-20 11:33:50,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999787415] [2021-01-20 11:33:50,051 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:50,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:50,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:50,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:33:50,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:50,468 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:50,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:50,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:50,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895653241] [2021-01-20 11:33:50,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:50,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:50,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:50,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:50,493 INFO L87 Difference]: Start difference. First operand 32120 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:52,704 INFO L93 Difference]: Finished difference Result 32512 states and 72689 transitions. [2021-01-20 11:33:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:33:52,705 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:52,742 INFO L225 Difference]: With dead ends: 32512 [2021-01-20 11:33:52,742 INFO L226 Difference]: Without dead ends: 32360 [2021-01-20 11:33:52,743 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:33:52,743 INFO L78 Accepts]: Start accepts. Automaton has 32360 states. Word has length 58 [2021-01-20 11:33:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:52,743 INFO L481 AbstractCegarLoop]: Abstraction has 32360 states. [2021-01-20 11:33:52,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:52,743 INFO L276 IsEmpty]: Start isEmpty. Operand 32360 states. [2021-01-20 11:33:52,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:52,768 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:52,768 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:52,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-20 11:33:52,969 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:52,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1033008748, now seen corresponding path program 35 times [2021-01-20 11:33:52,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:52,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770697289] [2021-01-20 11:33:52,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:53,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770697289] [2021-01-20 11:33:53,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316249731] [2021-01-20 11:33:53,158 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:53,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:33:53,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:53,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:53,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:54,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:54,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:54,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:54,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994665415] [2021-01-20 11:33:54,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:54,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:54,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:54,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=339, Unknown=1, NotChecked=0, Total=420 [2021-01-20 11:33:54,142 INFO L87 Difference]: Start difference. First operand 32360 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:57,463 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-01-20 11:33:58,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:58,246 INFO L93 Difference]: Finished difference Result 32632 states and 72929 transitions. [2021-01-20 11:33:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 11:33:58,247 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:58,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:58,281 INFO L225 Difference]: With dead ends: 32632 [2021-01-20 11:33:58,281 INFO L226 Difference]: Without dead ends: 32480 [2021-01-20 11:33:58,281 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=349, Invalid=1290, Unknown=1, NotChecked=0, Total=1640 [2021-01-20 11:33:58,282 INFO L78 Accepts]: Start accepts. Automaton has 32480 states. Word has length 58 [2021-01-20 11:33:58,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:58,282 INFO L481 AbstractCegarLoop]: Abstraction has 32480 states. [2021-01-20 11:33:58,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 32480 states. [2021-01-20 11:33:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:58,303 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:58,303 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:58,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-20 11:33:58,504 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:58,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1539877684, now seen corresponding path program 36 times [2021-01-20 11:33:58,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:58,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815368190] [2021-01-20 11:33:58,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:58,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815368190] [2021-01-20 11:33:58,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266602640] [2021-01-20 11:33:58,688 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:58,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:33:58,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:58,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:58,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:59,098 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:59,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:59,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:59,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200242127] [2021-01-20 11:33:59,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:59,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:59,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:59,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:59,121 INFO L87 Difference]: Start difference. First operand 32480 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:02,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:02,659 INFO L93 Difference]: Finished difference Result 32752 states and 73169 transitions. [2021-01-20 11:34:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:34:02,660 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:02,696 INFO L225 Difference]: With dead ends: 32752 [2021-01-20 11:34:02,696 INFO L226 Difference]: Without dead ends: 32600 [2021-01-20 11:34:02,698 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=424, Invalid=1468, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 11:34:02,699 INFO L78 Accepts]: Start accepts. Automaton has 32600 states. Word has length 58 [2021-01-20 11:34:02,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:02,699 INFO L481 AbstractCegarLoop]: Abstraction has 32600 states. [2021-01-20 11:34:02,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:02,699 INFO L276 IsEmpty]: Start isEmpty. Operand 32600 states. [2021-01-20 11:34:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:02,724 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:02,724 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:02,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:02,925 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:02,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:02,926 INFO L82 PathProgramCache]: Analyzing trace with hash -783876912, now seen corresponding path program 37 times [2021-01-20 11:34:02,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:02,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412465175] [2021-01-20 11:34:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:03,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412465175] [2021-01-20 11:34:03,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427588123] [2021-01-20 11:34:03,267 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:03,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:03,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:03,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:03,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:03,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:03,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:34:03,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76762985] [2021-01-20 11:34:03,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:34:03,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:03,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:34:03,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:34:03,698 INFO L87 Difference]: Start difference. First operand 32600 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:05,616 INFO L93 Difference]: Finished difference Result 34584 states and 77597 transitions. [2021-01-20 11:34:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 11:34:05,617 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:05,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:05,660 INFO L225 Difference]: With dead ends: 34584 [2021-01-20 11:34:05,660 INFO L226 Difference]: Without dead ends: 34220 [2021-01-20 11:34:05,661 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=623, Invalid=2133, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 11:34:05,661 INFO L78 Accepts]: Start accepts. Automaton has 34220 states. Word has length 58 [2021-01-20 11:34:05,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:05,661 INFO L481 AbstractCegarLoop]: Abstraction has 34220 states. [2021-01-20 11:34:05,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:05,661 INFO L276 IsEmpty]: Start isEmpty. Operand 34220 states. [2021-01-20 11:34:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:05,690 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:05,690 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:05,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-20 11:34:05,891 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:05,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1112097722, now seen corresponding path program 38 times [2021-01-20 11:34:05,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:05,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132328310] [2021-01-20 11:34:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:06,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132328310] [2021-01-20 11:34:06,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210618202] [2021-01-20 11:34:06,121 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:06,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:34:06,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:06,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:06,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:06,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:06,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:06,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:06,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:06,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:06,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995871218] [2021-01-20 11:34:06,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:06,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:06,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:06,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:06,672 INFO L87 Difference]: Start difference. First operand 34220 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:07,704 INFO L93 Difference]: Finished difference Result 34652 states and 77539 transitions. [2021-01-20 11:34:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:34:07,705 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:07,742 INFO L225 Difference]: With dead ends: 34652 [2021-01-20 11:34:07,742 INFO L226 Difference]: Without dead ends: 34500 [2021-01-20 11:34:07,742 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:34:07,742 INFO L78 Accepts]: Start accepts. Automaton has 34500 states. Word has length 58 [2021-01-20 11:34:07,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:07,742 INFO L481 AbstractCegarLoop]: Abstraction has 34500 states. [2021-01-20 11:34:07,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:07,743 INFO L276 IsEmpty]: Start isEmpty. Operand 34500 states. [2021-01-20 11:34:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:07,766 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:07,766 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:07,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-20 11:34:07,967 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:07,967 INFO L82 PathProgramCache]: Analyzing trace with hash 841175852, now seen corresponding path program 39 times [2021-01-20 11:34:07,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:07,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966852260] [2021-01-20 11:34:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:08,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966852260] [2021-01-20 11:34:08,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302356573] [2021-01-20 11:34:08,181 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:08,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:34:08,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:08,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:08,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:08,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:08,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:08,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:08,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:08,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:08,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:08,595 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:08,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:08,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:08,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:08,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068651885] [2021-01-20 11:34:08,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:08,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:08,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:08,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:08,683 INFO L87 Difference]: Start difference. First operand 34500 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:09,969 INFO L93 Difference]: Finished difference Result 34812 states and 77859 transitions. [2021-01-20 11:34:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 11:34:09,970 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:10,007 INFO L225 Difference]: With dead ends: 34812 [2021-01-20 11:34:10,008 INFO L226 Difference]: Without dead ends: 34660 [2021-01-20 11:34:10,008 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 11:34:10,008 INFO L78 Accepts]: Start accepts. Automaton has 34660 states. Word has length 58 [2021-01-20 11:34:10,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:10,008 INFO L481 AbstractCegarLoop]: Abstraction has 34660 states. [2021-01-20 11:34:10,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:10,008 INFO L276 IsEmpty]: Start isEmpty. Operand 34660 states. [2021-01-20 11:34:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:10,033 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:10,033 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:10,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-20 11:34:10,234 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:10,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:10,234 INFO L82 PathProgramCache]: Analyzing trace with hash 147775686, now seen corresponding path program 40 times [2021-01-20 11:34:10,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:10,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974229280] [2021-01-20 11:34:10,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:10,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974229280] [2021-01-20 11:34:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867665148] [2021-01-20 11:34:10,452 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:10,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:34:10,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:10,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:34:10,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:10,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:10,847 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:10,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:10,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:10,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:10,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269658718] [2021-01-20 11:34:10,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:10,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:10,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:10,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:10,908 INFO L87 Difference]: Start difference. First operand 34660 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:12,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:12,239 INFO L93 Difference]: Finished difference Result 34852 states and 77939 transitions. [2021-01-20 11:34:12,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:34:12,240 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:12,278 INFO L225 Difference]: With dead ends: 34852 [2021-01-20 11:34:12,278 INFO L226 Difference]: Without dead ends: 34700 [2021-01-20 11:34:12,278 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=387, Invalid=1419, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:34:12,279 INFO L78 Accepts]: Start accepts. Automaton has 34700 states. Word has length 58 [2021-01-20 11:34:12,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:12,279 INFO L481 AbstractCegarLoop]: Abstraction has 34700 states. [2021-01-20 11:34:12,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 34700 states. [2021-01-20 11:34:12,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:12,302 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:12,302 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:12,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:12,503 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:12,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:12,504 INFO L82 PathProgramCache]: Analyzing trace with hash -123146184, now seen corresponding path program 41 times [2021-01-20 11:34:12,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:12,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151121872] [2021-01-20 11:34:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:12,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151121872] [2021-01-20 11:34:12,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775033613] [2021-01-20 11:34:12,841 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:12,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:34:12,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:12,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:12,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:13,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:13,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:13,235 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:13,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:13,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:13,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:13,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:13,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:13,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:13,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:13,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003532135] [2021-01-20 11:34:13,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:13,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:13,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:13,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:13,328 INFO L87 Difference]: Start difference. First operand 34700 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:14,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:14,858 INFO L93 Difference]: Finished difference Result 34892 states and 78019 transitions. [2021-01-20 11:34:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 11:34:14,859 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:14,896 INFO L225 Difference]: With dead ends: 34892 [2021-01-20 11:34:14,897 INFO L226 Difference]: Without dead ends: 34740 [2021-01-20 11:34:14,897 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=440, Invalid=1540, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 11:34:14,897 INFO L78 Accepts]: Start accepts. Automaton has 34740 states. Word has length 58 [2021-01-20 11:34:14,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:14,897 INFO L481 AbstractCegarLoop]: Abstraction has 34740 states. [2021-01-20 11:34:14,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:14,897 INFO L276 IsEmpty]: Start isEmpty. Operand 34740 states. [2021-01-20 11:34:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:14,920 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:14,921 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:15,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:15,121 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:15,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1604977050, now seen corresponding path program 42 times [2021-01-20 11:34:15,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:15,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675671777] [2021-01-20 11:34:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:15,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675671777] [2021-01-20 11:34:15,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729685977] [2021-01-20 11:34:15,318 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:15,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:34:15,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:15,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:15,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:15,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:15,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:15,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:15,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:15,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:15,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061334643] [2021-01-20 11:34:15,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:15,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:15,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:15,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:15,749 INFO L87 Difference]: Start difference. First operand 34740 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:17,477 INFO L93 Difference]: Finished difference Result 34932 states and 78099 transitions. [2021-01-20 11:34:17,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 11:34:17,478 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:17,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:17,516 INFO L225 Difference]: With dead ends: 34932 [2021-01-20 11:34:17,517 INFO L226 Difference]: Without dead ends: 34780 [2021-01-20 11:34:17,517 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=490, Invalid=1672, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 11:34:17,517 INFO L78 Accepts]: Start accepts. Automaton has 34780 states. Word has length 58 [2021-01-20 11:34:17,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:17,518 INFO L481 AbstractCegarLoop]: Abstraction has 34780 states. [2021-01-20 11:34:17,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 34780 states. [2021-01-20 11:34:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:17,544 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:17,544 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:17,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:17,745 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:17,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:17,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2038566546, now seen corresponding path program 43 times [2021-01-20 11:34:17,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:17,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963115677] [2021-01-20 11:34:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:17,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963115677] [2021-01-20 11:34:17,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182941709] [2021-01-20 11:34:17,936 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:18,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:18,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:18,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:18,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:18,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:18,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:18,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776755691] [2021-01-20 11:34:18,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:18,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:18,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:18,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:18,393 INFO L87 Difference]: Start difference. First operand 34780 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:20,081 INFO L93 Difference]: Finished difference Result 35012 states and 78259 transitions. [2021-01-20 11:34:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 11:34:20,086 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:20,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:20,129 INFO L225 Difference]: With dead ends: 35012 [2021-01-20 11:34:20,129 INFO L226 Difference]: Without dead ends: 34860 [2021-01-20 11:34:20,130 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:34:20,130 INFO L78 Accepts]: Start accepts. Automaton has 34860 states. Word has length 58 [2021-01-20 11:34:20,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:20,130 INFO L481 AbstractCegarLoop]: Abstraction has 34860 states. [2021-01-20 11:34:20,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:20,130 INFO L276 IsEmpty]: Start isEmpty. Operand 34860 states. [2021-01-20 11:34:20,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:20,160 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:20,160 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:20,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:20,361 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:20,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1500399978, now seen corresponding path program 44 times [2021-01-20 11:34:20,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:20,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130236861] [2021-01-20 11:34:20,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:20,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130236861] [2021-01-20 11:34:20,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657840355] [2021-01-20 11:34:20,592 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:20,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:34:20,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:20,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:20,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:20,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:20,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:20,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:21,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:21,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:21,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:34:21,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528279333] [2021-01-20 11:34:21,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:34:21,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:21,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:34:21,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:34:21,120 INFO L87 Difference]: Start difference. First operand 34860 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:23,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:23,654 INFO L93 Difference]: Finished difference Result 36934 states and 82772 transitions. [2021-01-20 11:34:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 11:34:23,655 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:23,701 INFO L225 Difference]: With dead ends: 36934 [2021-01-20 11:34:23,702 INFO L226 Difference]: Without dead ends: 36570 [2021-01-20 11:34:23,702 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=727, Invalid=2465, Unknown=0, NotChecked=0, Total=3192 [2021-01-20 11:34:23,702 INFO L78 Accepts]: Start accepts. Automaton has 36570 states. Word has length 58 [2021-01-20 11:34:23,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:23,703 INFO L481 AbstractCegarLoop]: Abstraction has 36570 states. [2021-01-20 11:34:23,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:23,703 INFO L276 IsEmpty]: Start isEmpty. Operand 36570 states. [2021-01-20 11:34:23,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:23,737 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:23,738 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:23,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-01-20 11:34:23,938 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:23,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:23,939 INFO L82 PathProgramCache]: Analyzing trace with hash 507842304, now seen corresponding path program 45 times [2021-01-20 11:34:23,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:23,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941315991] [2021-01-20 11:34:23,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:24,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941315991] [2021-01-20 11:34:24,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502042569] [2021-01-20 11:34:24,247 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:24,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:34:24,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:24,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:24,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:24,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:24,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:24,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:24,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:24,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:24,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:24,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:24,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:24,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:24,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:24,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428762813] [2021-01-20 11:34:24,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:24,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:24,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:24,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:24,775 INFO L87 Difference]: Start difference. First operand 36570 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:26,873 INFO L93 Difference]: Finished difference Result 36762 states and 82234 transitions. [2021-01-20 11:34:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 11:34:26,874 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:26,916 INFO L225 Difference]: With dead ends: 36762 [2021-01-20 11:34:26,916 INFO L226 Difference]: Without dead ends: 36610 [2021-01-20 11:34:26,921 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=616, Invalid=2140, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 11:34:26,922 INFO L78 Accepts]: Start accepts. Automaton has 36610 states. Word has length 58 [2021-01-20 11:34:26,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:26,922 INFO L481 AbstractCegarLoop]: Abstraction has 36610 states. [2021-01-20 11:34:26,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:26,922 INFO L276 IsEmpty]: Start isEmpty. Operand 36610 states. [2021-01-20 11:34:26,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:26,950 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:26,950 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:27,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:27,151 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:27,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2065044128, now seen corresponding path program 46 times [2021-01-20 11:34:27,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:27,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404405670] [2021-01-20 11:34:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:27,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404405670] [2021-01-20 11:34:27,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080874792] [2021-01-20 11:34:27,348 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:27,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:34:27,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:27,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:34:27,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:27,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:27,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:27,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:27,779 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:27,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:27,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:27,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:27,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:27,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:27,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:27,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003930059] [2021-01-20 11:34:27,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:27,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:27,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:27,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:27,877 INFO L87 Difference]: Start difference. First operand 36610 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:29,959 INFO L93 Difference]: Finished difference Result 36802 states and 82314 transitions. [2021-01-20 11:34:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-20 11:34:29,960 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:30,002 INFO L225 Difference]: With dead ends: 36802 [2021-01-20 11:34:30,002 INFO L226 Difference]: Without dead ends: 36650 [2021-01-20 11:34:30,002 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=567, Invalid=1883, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 11:34:30,003 INFO L78 Accepts]: Start accepts. Automaton has 36650 states. Word has length 58 [2021-01-20 11:34:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:30,004 INFO L481 AbstractCegarLoop]: Abstraction has 36650 states. [2021-01-20 11:34:30,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 36650 states. [2021-01-20 11:34:30,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:30,032 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:30,033 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:30,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-20 11:34:30,233 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:30,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:30,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1309043356, now seen corresponding path program 47 times [2021-01-20 11:34:30,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:30,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047998338] [2021-01-20 11:34:30,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:30,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047998338] [2021-01-20 11:34:30,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404099022] [2021-01-20 11:34:30,471 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:30,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:34:30,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:30,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:30,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:30,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:31,002 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:31,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:37,290 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2021-01-20 11:34:37,311 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:37,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:37,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:37,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533576519] [2021-01-20 11:34:37,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:37,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:37,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:37,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=321, Unknown=2, NotChecked=0, Total=420 [2021-01-20 11:34:37,419 INFO L87 Difference]: Start difference. First operand 36650 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:37,900 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 16 [2021-01-20 11:34:38,922 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 22 [2021-01-20 11:34:39,197 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 18 [2021-01-20 11:34:46,101 WARN L193 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-01-20 11:34:52,831 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-01-20 11:34:55,847 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 40 [2021-01-20 11:35:01,297 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-01-20 11:35:01,573 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 21 [2021-01-20 11:35:20,270 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 42 [2021-01-20 11:35:25,674 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-01-20 11:35:57,529 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-01-20 11:38:17,775 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2021-01-20 11:39:31,465 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-01-20 11:40:13,328 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-20 11:40:21,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:21,448 INFO L93 Difference]: Finished difference Result 39042 states and 87558 transitions. [2021-01-20 11:40:21,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-20 11:40:21,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:40:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:21,501 INFO L225 Difference]: With dead ends: 39042 [2021-01-20 11:40:21,501 INFO L226 Difference]: Without dead ends: 38550 [2021-01-20 11:40:21,502 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 102.1s TimeCoverageRelationStatistics Valid=873, Invalid=3135, Unknown=24, NotChecked=0, Total=4032 [2021-01-20 11:40:21,502 INFO L78 Accepts]: Start accepts. Automaton has 38550 states. Word has length 58 [2021-01-20 11:40:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:21,502 INFO L481 AbstractCegarLoop]: Abstraction has 38550 states. [2021-01-20 11:40:21,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 38550 states. [2021-01-20 11:40:21,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:40:21,535 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:21,536 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:21,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:21,737 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:21,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:21,738 INFO L82 PathProgramCache]: Analyzing trace with hash -597019592, now seen corresponding path program 48 times [2021-01-20 11:40:21,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:21,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538638704] [2021-01-20 11:40:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:22,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538638704] [2021-01-20 11:40:22,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861235715] [2021-01-20 11:40:22,320 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:22,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:40:22,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:22,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:40:22,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:23,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:23,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:23,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:40:23,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591721031] [2021-01-20 11:40:23,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:40:23,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:23,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:40:23,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:40:23,262 INFO L87 Difference]: Start difference. First operand 38550 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:23,748 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-01-20 11:40:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:26,321 INFO L93 Difference]: Finished difference Result 39302 states and 87884 transitions. [2021-01-20 11:40:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 11:40:26,326 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:40:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:26,373 INFO L225 Difference]: With dead ends: 39302 [2021-01-20 11:40:26,374 INFO L226 Difference]: Without dead ends: 39150 [2021-01-20 11:40:26,374 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:40:26,374 INFO L78 Accepts]: Start accepts. Automaton has 39150 states. Word has length 58 [2021-01-20 11:40:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:26,374 INFO L481 AbstractCegarLoop]: Abstraction has 39150 states. [2021-01-20 11:40:26,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 39150 states. [2021-01-20 11:40:26,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:40:26,403 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:26,403 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:26,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-20 11:40:26,606 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:26,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:26,606 INFO L82 PathProgramCache]: Analyzing trace with hash -867941462, now seen corresponding path program 49 times [2021-01-20 11:40:26,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:26,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710994848] [2021-01-20 11:40:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:27,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710994848] [2021-01-20 11:40:27,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647653046] [2021-01-20 11:40:27,180 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:27,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:40:27,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:28,007 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:28,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:28,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:40:28,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473418755] [2021-01-20 11:40:28,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:40:28,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:28,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:40:28,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:40:28,118 INFO L87 Difference]: Start difference. First operand 39150 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:31,883 INFO L93 Difference]: Finished difference Result 40382 states and 90172 transitions. [2021-01-20 11:40:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:40:31,888 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:40:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:31,937 INFO L225 Difference]: With dead ends: 40382 [2021-01-20 11:40:31,938 INFO L226 Difference]: Without dead ends: 39990 [2021-01-20 11:40:31,938 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:40:31,938 INFO L78 Accepts]: Start accepts. Automaton has 39990 states. Word has length 58 [2021-01-20 11:40:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:31,938 INFO L481 AbstractCegarLoop]: Abstraction has 39990 states. [2021-01-20 11:40:31,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:31,939 INFO L276 IsEmpty]: Start isEmpty. Operand 39990 states. [2021-01-20 11:40:31,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:40:31,966 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:31,966 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:32,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:32,167 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:32,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:32,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1582882476, now seen corresponding path program 50 times [2021-01-20 11:40:32,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:32,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767691531] [2021-01-20 11:40:32,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:32,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767691531] [2021-01-20 11:40:32,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519848700] [2021-01-20 11:40:32,743 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:32,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:40:32,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:32,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:40:32,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:33,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:33,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:33,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:40:33,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252914097] [2021-01-20 11:40:33,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:40:33,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:33,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:40:33,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:40:33,706 INFO L87 Difference]: Start difference. First operand 39990 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:37,366 INFO L93 Difference]: Finished difference Result 40742 states and 90764 transitions. [2021-01-20 11:40:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 11:40:37,372 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:40:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:37,421 INFO L225 Difference]: With dead ends: 40742 [2021-01-20 11:40:37,421 INFO L226 Difference]: Without dead ends: 40590 [2021-01-20 11:40:37,422 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:40:37,422 INFO L78 Accepts]: Start accepts. Automaton has 40590 states. Word has length 58 [2021-01-20 11:40:37,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:37,422 INFO L481 AbstractCegarLoop]: Abstraction has 40590 states. [2021-01-20 11:40:37,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 40590 states. [2021-01-20 11:40:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:40:37,605 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:37,605 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:37,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:37,807 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:37,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:37,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1311960606, now seen corresponding path program 51 times [2021-01-20 11:40:37,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:37,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469967331] [2021-01-20 11:40:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:38,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469967331] [2021-01-20 11:40:38,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753740160] [2021-01-20 11:40:38,404 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:38,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:40:38,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:38,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:40:38,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:39,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:39,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:39,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:40:39,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475163898] [2021-01-20 11:40:39,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:40:39,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:39,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:40:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:40:39,374 INFO L87 Difference]: Start difference. First operand 40590 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:43,323 INFO L93 Difference]: Finished difference Result 41062 states and 91404 transitions. [2021-01-20 11:40:43,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 11:40:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:40:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:43,377 INFO L225 Difference]: With dead ends: 41062 [2021-01-20 11:40:43,377 INFO L226 Difference]: Without dead ends: 40910 [2021-01-20 11:40:43,378 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:40:43,378 INFO L78 Accepts]: Start accepts. Automaton has 40910 states. Word has length 58 [2021-01-20 11:40:43,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:43,378 INFO L481 AbstractCegarLoop]: Abstraction has 40910 states. [2021-01-20 11:40:43,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:43,378 INFO L276 IsEmpty]: Start isEmpty. Operand 40910 states. [2021-01-20 11:40:43,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:40:43,408 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:43,408 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:43,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-01-20 11:40:43,609 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:43,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:43,610 INFO L82 PathProgramCache]: Analyzing trace with hash -255638260, now seen corresponding path program 52 times [2021-01-20 11:40:43,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:43,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060459781] [2021-01-20 11:40:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:44,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060459781] [2021-01-20 11:40:44,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339226634] [2021-01-20 11:40:44,153 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:44,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:40:44,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:44,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:40:44,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:45,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:45,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:45,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:40:45,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531540231] [2021-01-20 11:40:45,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:40:45,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:45,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:40:45,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:40:45,268 INFO L87 Difference]: Start difference. First operand 40910 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:49,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:49,748 INFO L93 Difference]: Finished difference Result 41822 states and 92924 transitions. [2021-01-20 11:40:49,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 11:40:49,754 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:40:49,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:49,827 INFO L225 Difference]: With dead ends: 41822 [2021-01-20 11:40:49,827 INFO L226 Difference]: Without dead ends: 41670 [2021-01-20 11:40:49,828 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 11:40:49,828 INFO L78 Accepts]: Start accepts. Automaton has 41670 states. Word has length 58 [2021-01-20 11:40:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:49,828 INFO L481 AbstractCegarLoop]: Abstraction has 41670 states. [2021-01-20 11:40:49,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 41670 states. [2021-01-20 11:40:49,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:40:49,869 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:49,869 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:50,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:50,085 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:50,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:50,085 INFO L82 PathProgramCache]: Analyzing trace with hash -526560130, now seen corresponding path program 53 times [2021-01-20 11:40:50,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:50,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235885320] [2021-01-20 11:40:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:50,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235885320] [2021-01-20 11:40:50,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979015844] [2021-01-20 11:40:50,762 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:50,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:40:50,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:50,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:40:50,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:51,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:51,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:51,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:40:51,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767187618] [2021-01-20 11:40:51,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:40:51,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:51,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:40:51,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:40:51,724 INFO L87 Difference]: Start difference. First operand 41670 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:53,409 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 13 [2021-01-20 11:40:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:56,434 INFO L93 Difference]: Finished difference Result 42622 states and 94652 transitions. [2021-01-20 11:40:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 11:40:56,439 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:40:56,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:56,491 INFO L225 Difference]: With dead ends: 42622 [2021-01-20 11:40:56,492 INFO L226 Difference]: Without dead ends: 42230 [2021-01-20 11:40:56,492 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=549, Invalid=2103, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 11:40:56,492 INFO L78 Accepts]: Start accepts. Automaton has 42230 states. Word has length 58 [2021-01-20 11:40:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:56,492 INFO L481 AbstractCegarLoop]: Abstraction has 42230 states. [2021-01-20 11:40:56,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:56,493 INFO L276 IsEmpty]: Start isEmpty. Operand 42230 states. [2021-01-20 11:40:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:40:56,521 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:56,521 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:56,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:56,722 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:56,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1950977952, now seen corresponding path program 54 times [2021-01-20 11:40:56,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:56,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043166089] [2021-01-20 11:40:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:57,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043166089] [2021-01-20 11:40:57,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010294764] [2021-01-20 11:40:57,269 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:57,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:40:57,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:57,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:40:57,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:58,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:58,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:58,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:40:58,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888081792] [2021-01-20 11:40:58,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:40:58,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:58,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:40:58,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:40:58,247 INFO L87 Difference]: Start difference. First operand 42230 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:02,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:02,777 INFO L93 Difference]: Finished difference Result 42422 states and 94124 transitions. [2021-01-20 11:41:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 11:41:02,783 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:41:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:02,834 INFO L225 Difference]: With dead ends: 42422 [2021-01-20 11:41:02,834 INFO L226 Difference]: Without dead ends: 42270 [2021-01-20 11:41:02,835 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=604, Invalid=2048, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 11:41:02,835 INFO L78 Accepts]: Start accepts. Automaton has 42270 states. Word has length 58 [2021-01-20 11:41:02,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:02,835 INFO L481 AbstractCegarLoop]: Abstraction has 42270 states. [2021-01-20 11:41:02,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:02,835 INFO L276 IsEmpty]: Start isEmpty. Operand 42270 states. [2021-01-20 11:41:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:41:02,862 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:02,862 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:41:03,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-01-20 11:41:03,063 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:03,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1692565644, now seen corresponding path program 55 times [2021-01-20 11:41:03,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:03,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661400242] [2021-01-20 11:41:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:03,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661400242] [2021-01-20 11:41:03,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216001400] [2021-01-20 11:41:03,716 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:03,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:41:03,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:04,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:04,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:04,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:41:04,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468129238] [2021-01-20 11:41:04,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:41:04,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:04,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:41:04,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:41:04,702 INFO L87 Difference]: Start difference. First operand 42270 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:09,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:09,413 INFO L93 Difference]: Finished difference Result 43152 states and 95869 transitions. [2021-01-20 11:41:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 11:41:09,419 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:41:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:09,476 INFO L225 Difference]: With dead ends: 43152 [2021-01-20 11:41:09,476 INFO L226 Difference]: Without dead ends: 43000 [2021-01-20 11:41:09,476 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 11:41:09,476 INFO L78 Accepts]: Start accepts. Automaton has 43000 states. Word has length 58 [2021-01-20 11:41:09,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:09,477 INFO L481 AbstractCegarLoop]: Abstraction has 43000 states. [2021-01-20 11:41:09,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 43000 states. [2021-01-20 11:41:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:41:09,507 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:09,507 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:41:09,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:09,708 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:09,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1846400880, now seen corresponding path program 56 times [2021-01-20 11:41:09,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:09,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003472408] [2021-01-20 11:41:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:10,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003472408] [2021-01-20 11:41:10,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300563839] [2021-01-20 11:41:10,451 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:10,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:41:10,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:10,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:41:10,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:11,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:41:11,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:11,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:11,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:41:11,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359072453] [2021-01-20 11:41:11,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:41:11,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:11,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:41:11,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:41:11,322 INFO L87 Difference]: Start difference. First operand 43000 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:14,225 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-01-20 11:41:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:17,073 INFO L93 Difference]: Finished difference Result 45564 states and 101267 transitions. [2021-01-20 11:41:17,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 11:41:17,081 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:41:17,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:17,140 INFO L225 Difference]: With dead ends: 45564 [2021-01-20 11:41:17,140 INFO L226 Difference]: Without dead ends: 45200 [2021-01-20 11:41:17,140 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=780, Invalid=2642, Unknown=0, NotChecked=0, Total=3422 [2021-01-20 11:41:17,140 INFO L78 Accepts]: Start accepts. Automaton has 45200 states. Word has length 58 [2021-01-20 11:41:17,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:17,141 INFO L481 AbstractCegarLoop]: Abstraction has 45200 states. [2021-01-20 11:41:17,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:17,141 INFO L276 IsEmpty]: Start isEmpty. Operand 45200 states. [2021-01-20 11:41:17,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:41:17,170 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:17,170 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:41:17,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-01-20 11:41:17,371 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:17,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:17,372 INFO L82 PathProgramCache]: Analyzing trace with hash 161841402, now seen corresponding path program 57 times [2021-01-20 11:41:17,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:17,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467157770] [2021-01-20 11:41:17,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:17,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467157770] [2021-01-20 11:41:17,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206537282] [2021-01-20 11:41:17,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:18,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:41:18,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:18,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:41:18,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:18,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:18,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:18,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:41:18,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641932306] [2021-01-20 11:41:18,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:41:18,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:18,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:41:18,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:41:18,919 INFO L87 Difference]: Start difference. First operand 45200 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:24,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:24,008 INFO L93 Difference]: Finished difference Result 45912 states and 101769 transitions. [2021-01-20 11:41:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-20 11:41:24,013 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:41:24,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:24,069 INFO L225 Difference]: With dead ends: 45912 [2021-01-20 11:41:24,069 INFO L226 Difference]: Without dead ends: 45760 [2021-01-20 11:41:24,070 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=724, Invalid=2468, Unknown=0, NotChecked=0, Total=3192 [2021-01-20 11:41:24,070 INFO L78 Accepts]: Start accepts. Automaton has 45760 states. Word has length 58 [2021-01-20 11:41:24,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:24,070 INFO L481 AbstractCegarLoop]: Abstraction has 45760 states. [2021-01-20 11:41:24,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:24,070 INFO L276 IsEmpty]: Start isEmpty. Operand 45760 states. [2021-01-20 11:41:24,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:41:24,100 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:24,100 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:41:24,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-20 11:41:24,303 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:24,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:24,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1883922266, now seen corresponding path program 58 times [2021-01-20 11:41:24,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:24,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058004335] [2021-01-20 11:41:24,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:24,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058004335] [2021-01-20 11:41:24,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136154227] [2021-01-20 11:41:24,855 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:24,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:41:24,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:24,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:41:24,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:25,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:25,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:25,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:41:25,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412164490] [2021-01-20 11:41:25,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:41:25,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:25,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:41:25,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:41:25,790 INFO L87 Difference]: Start difference. First operand 45760 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:27,960 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-01-20 11:41:32,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:32,268 INFO L93 Difference]: Finished difference Result 47260 states and 104847 transitions. [2021-01-20 11:41:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-20 11:41:32,273 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:41:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:32,329 INFO L225 Difference]: With dead ends: 47260 [2021-01-20 11:41:32,330 INFO L226 Difference]: Without dead ends: 46780 [2021-01-20 11:41:32,330 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=887, Invalid=3273, Unknown=0, NotChecked=0, Total=4160 [2021-01-20 11:41:32,330 INFO L78 Accepts]: Start accepts. Automaton has 46780 states. Word has length 58 [2021-01-20 11:41:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:32,331 INFO L481 AbstractCegarLoop]: Abstraction has 46780 states. [2021-01-20 11:41:32,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 46780 states. [2021-01-20 11:41:32,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:41:32,364 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:32,364 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:41:32,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-20 11:41:32,564 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:32,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1655044258, now seen corresponding path program 59 times [2021-01-20 11:41:32,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:32,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777768227] [2021-01-20 11:41:32,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:33,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777768227] [2021-01-20 11:41:33,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682308289] [2021-01-20 11:41:33,140 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:33,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:41:33,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:33,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:41:33,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:33,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:41:33,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:33,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:33,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:41:33,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733497155] [2021-01-20 11:41:33,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:41:33,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:33,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:41:33,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:41:33,929 INFO L87 Difference]: Start difference. First operand 46780 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:41,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:41,236 INFO L93 Difference]: Finished difference Result 51444 states and 113979 transitions. [2021-01-20 11:41:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-20 11:41:41,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:41:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:41,309 INFO L225 Difference]: With dead ends: 51444 [2021-01-20 11:41:41,309 INFO L226 Difference]: Without dead ends: 50910 [2021-01-20 11:41:41,310 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1097, Invalid=3873, Unknown=0, NotChecked=0, Total=4970 [2021-01-20 11:41:41,310 INFO L78 Accepts]: Start accepts. Automaton has 50910 states. Word has length 58 [2021-01-20 11:41:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:41,310 INFO L481 AbstractCegarLoop]: Abstraction has 50910 states. [2021-01-20 11:41:41,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 50910 states. [2021-01-20 11:41:41,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:41:41,342 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:41,342 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:41:41,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:41,543 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:41,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1791249794, now seen corresponding path program 60 times [2021-01-20 11:41:41,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:41,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812372325] [2021-01-20 11:41:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:42,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812372325] [2021-01-20 11:41:42,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960131598] [2021-01-20 11:41:42,099 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:42,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:41:42,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:42,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:41:42,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:43,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:43,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:43,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:43,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:43,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:41:43,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120612855] [2021-01-20 11:41:43,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:41:43,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:43,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:41:43,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:41:43,246 INFO L87 Difference]: Start difference. First operand 50910 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:45,061 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-01-20 11:41:46,307 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-01-20 11:41:47,797 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-01-20 11:41:48,286 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-01-20 11:41:49,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:49,581 INFO L93 Difference]: Finished difference Result 51822 states and 114444 transitions. [2021-01-20 11:41:49,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 11:41:49,587 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:41:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:49,656 INFO L225 Difference]: With dead ends: 51822 [2021-01-20 11:41:49,656 INFO L226 Difference]: Without dead ends: 51670 [2021-01-20 11:41:49,656 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 11:41:49,657 INFO L78 Accepts]: Start accepts. Automaton has 51670 states. Word has length 58 [2021-01-20 11:41:49,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:49,657 INFO L481 AbstractCegarLoop]: Abstraction has 51670 states. [2021-01-20 11:41:49,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:49,657 INFO L276 IsEmpty]: Start isEmpty. Operand 51670 states. [2021-01-20 11:41:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:41:49,690 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:49,690 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:41:49,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:49,892 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:49,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1035249022, now seen corresponding path program 61 times [2021-01-20 11:41:49,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:49,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998099695] [2021-01-20 11:41:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:50,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998099695] [2021-01-20 11:41:50,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051853186] [2021-01-20 11:41:50,470 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:50,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:41:50,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:51,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:41:51,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:41:51,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:41:51,439 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-01-20 11:41:51,556 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-01-20 11:41:51,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:51,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:51,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:41:51,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114684837] [2021-01-20 11:41:51,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:41:51,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:51,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:41:51,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:41:51,699 INFO L87 Difference]: Start difference. First operand 51670 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:52,560 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 19 [2021-01-20 11:41:52,932 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2021-01-20 11:41:53,318 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-01-20 11:41:53,728 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-01-20 11:41:55,259 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-01-20 11:41:55,644 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-01-20 11:41:55,848 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 17 [2021-01-20 11:41:56,362 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-01-20 11:41:56,574 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-01-20 11:41:57,476 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-01-20 11:41:57,715 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-01-20 11:41:58,174 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 18 [2021-01-20 11:42:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:00,344 INFO L93 Difference]: Finished difference Result 53874 states and 119122 transitions. [2021-01-20 11:42:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-20 11:42:00,350 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:42:00,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:00,419 INFO L225 Difference]: With dead ends: 53874 [2021-01-20 11:42:00,420 INFO L226 Difference]: Without dead ends: 53510 [2021-01-20 11:42:00,420 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1048, Invalid=3374, Unknown=0, NotChecked=0, Total=4422 [2021-01-20 11:42:00,420 INFO L78 Accepts]: Start accepts. Automaton has 53510 states. Word has length 58 [2021-01-20 11:42:00,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:00,420 INFO L481 AbstractCegarLoop]: Abstraction has 53510 states. [2021-01-20 11:42:00,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:00,421 INFO L276 IsEmpty]: Start isEmpty. Operand 53510 states. [2021-01-20 11:42:00,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:42:00,454 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:00,455 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:00,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:00,655 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:00,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:00,656 INFO L82 PathProgramCache]: Analyzing trace with hash -313056756, now seen corresponding path program 62 times [2021-01-20 11:42:00,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:00,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625776807] [2021-01-20 11:42:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:01,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625776807] [2021-01-20 11:42:01,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674978692] [2021-01-20 11:42:01,319 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:01,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:42:01,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:01,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:42:01,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:02,050 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:02,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:02,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:02,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:42:02,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930472200] [2021-01-20 11:42:02,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:42:02,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:02,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:42:02,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:42:02,114 INFO L87 Difference]: Start difference. First operand 53510 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:03,003 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-01-20 11:42:03,539 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-01-20 11:42:03,718 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 17 [2021-01-20 11:42:03,909 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 14 [2021-01-20 11:42:05,514 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-01-20 11:42:05,697 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 15 [2021-01-20 11:42:06,749 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 15 [2021-01-20 11:42:07,285 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 16 [2021-01-20 11:42:09,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:09,179 INFO L93 Difference]: Finished difference Result 56014 states and 123972 transitions. [2021-01-20 11:42:09,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-20 11:42:09,185 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:42:09,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:09,256 INFO L225 Difference]: With dead ends: 56014 [2021-01-20 11:42:09,257 INFO L226 Difference]: Without dead ends: 55650 [2021-01-20 11:42:09,257 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=894, Invalid=2766, Unknown=0, NotChecked=0, Total=3660 [2021-01-20 11:42:09,257 INFO L78 Accepts]: Start accepts. Automaton has 55650 states. Word has length 58 [2021-01-20 11:42:09,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:09,257 INFO L481 AbstractCegarLoop]: Abstraction has 55650 states. [2021-01-20 11:42:09,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:09,258 INFO L276 IsEmpty]: Start isEmpty. Operand 55650 states. [2021-01-20 11:42:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:42:09,288 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:09,288 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:09,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:09,495 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:09,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1894537680, now seen corresponding path program 4 times [2021-01-20 11:42:09,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:09,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599596506] [2021-01-20 11:42:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599596506] [2021-01-20 11:42:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740279986] [2021-01-20 11:42:10,106 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:10,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:42:10,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:10,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:42:10,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:10,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:11,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:11,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:42:11,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306166192] [2021-01-20 11:42:11,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:42:11,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:11,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:42:11,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:42:11,028 INFO L87 Difference]: Start difference. First operand 55650 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:14,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:14,420 INFO L93 Difference]: Finished difference Result 56242 states and 124362 transitions. [2021-01-20 11:42:14,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 11:42:14,424 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:42:14,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:14,498 INFO L225 Difference]: With dead ends: 56242 [2021-01-20 11:42:14,499 INFO L226 Difference]: Without dead ends: 55850 [2021-01-20 11:42:14,499 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=409, Invalid=1397, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:42:14,499 INFO L78 Accepts]: Start accepts. Automaton has 55850 states. Word has length 58 [2021-01-20 11:42:14,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:14,499 INFO L481 AbstractCegarLoop]: Abstraction has 55850 states. [2021-01-20 11:42:14,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:14,500 INFO L276 IsEmpty]: Start isEmpty. Operand 55850 states. [2021-01-20 11:42:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:42:14,536 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:14,536 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:14,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-01-20 11:42:14,737 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:14,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:14,738 INFO L82 PathProgramCache]: Analyzing trace with hash -872417628, now seen corresponding path program 5 times [2021-01-20 11:42:14,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:14,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974185131] [2021-01-20 11:42:14,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:15,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974185131] [2021-01-20 11:42:15,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883015466] [2021-01-20 11:42:15,588 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:15,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 11:42:15,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:15,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:42:15,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:16,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:16,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:16,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:42:16,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210584622] [2021-01-20 11:42:16,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:42:16,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:16,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:42:16,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:42:16,626 INFO L87 Difference]: Start difference. First operand 55850 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:20,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:20,283 INFO L93 Difference]: Finished difference Result 56722 states and 125322 transitions. [2021-01-20 11:42:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:42:20,288 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:42:20,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:20,363 INFO L225 Difference]: With dead ends: 56722 [2021-01-20 11:42:20,363 INFO L226 Difference]: Without dead ends: 56330 [2021-01-20 11:42:20,364 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=435, Invalid=1635, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:42:20,364 INFO L78 Accepts]: Start accepts. Automaton has 56330 states. Word has length 58 [2021-01-20 11:42:20,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:20,364 INFO L481 AbstractCegarLoop]: Abstraction has 56330 states. [2021-01-20 11:42:20,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:20,364 INFO L276 IsEmpty]: Start isEmpty. Operand 56330 states. [2021-01-20 11:42:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:42:20,402 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:20,402 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:20,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:20,603 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:20,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:20,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1434060580, now seen corresponding path program 6 times [2021-01-20 11:42:20,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:20,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157578266] [2021-01-20 11:42:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:20,852 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-20 11:42:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:21,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157578266] [2021-01-20 11:42:21,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267408228] [2021-01-20 11:42:21,427 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:21,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 11:42:21,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:21,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:42:21,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:22,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:22,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:22,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:42:22,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045824643] [2021-01-20 11:42:22,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:42:22,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:22,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:42:22,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:42:22,404 INFO L87 Difference]: Start difference. First operand 56330 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:23,499 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-01-20 11:42:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:26,857 INFO L93 Difference]: Finished difference Result 57002 states and 125882 transitions. [2021-01-20 11:42:26,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-20 11:42:26,863 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:42:26,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:26,952 INFO L225 Difference]: With dead ends: 57002 [2021-01-20 11:42:26,952 INFO L226 Difference]: Without dead ends: 56610 [2021-01-20 11:42:26,953 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=525, Invalid=2025, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 11:42:26,953 INFO L78 Accepts]: Start accepts. Automaton has 56610 states. Word has length 58 [2021-01-20 11:42:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:26,954 INFO L481 AbstractCegarLoop]: Abstraction has 56610 states. [2021-01-20 11:42:26,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 56610 states. [2021-01-20 11:42:26,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:42:26,996 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:26,996 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:27,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:27,197 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:27,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:27,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1407546276, now seen corresponding path program 7 times [2021-01-20 11:42:27,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:27,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099857916] [2021-01-20 11:42:27,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:28,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099857916] [2021-01-20 11:42:28,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293680029] [2021-01-20 11:42:28,082 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:28,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:42:28,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:28,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:29,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:29,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:42:29,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117619288] [2021-01-20 11:42:29,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:42:29,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:29,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:42:29,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:42:29,077 INFO L87 Difference]: Start difference. First operand 56610 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:34,062 INFO L93 Difference]: Finished difference Result 57322 states and 126522 transitions. [2021-01-20 11:42:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-20 11:42:34,067 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:42:34,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:34,138 INFO L225 Difference]: With dead ends: 57322 [2021-01-20 11:42:34,139 INFO L226 Difference]: Without dead ends: 56930 [2021-01-20 11:42:34,139 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=669, Invalid=2523, Unknown=0, NotChecked=0, Total=3192 [2021-01-20 11:42:34,139 INFO L78 Accepts]: Start accepts. Automaton has 56930 states. Word has length 58 [2021-01-20 11:42:34,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:34,139 INFO L481 AbstractCegarLoop]: Abstraction has 56930 states. [2021-01-20 11:42:34,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:34,140 INFO L276 IsEmpty]: Start isEmpty. Operand 56930 states. [2021-01-20 11:42:34,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:42:34,172 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:34,172 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:34,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:34,373 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2120637404, now seen corresponding path program 8 times [2021-01-20 11:42:34,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:34,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139393804] [2021-01-20 11:42:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:35,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139393804] [2021-01-20 11:42:35,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297228890] [2021-01-20 11:42:35,251 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:35,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:42:35,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:35,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:42:35,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:36,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:36,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:36,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:42:36,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316936303] [2021-01-20 11:42:36,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:42:36,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:36,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:42:36,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:42:36,293 INFO L87 Difference]: Start difference. First operand 56930 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:38,550 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-01-20 11:42:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:41,755 INFO L93 Difference]: Finished difference Result 57810 states and 127562 transitions. [2021-01-20 11:42:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-20 11:42:41,760 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:42:41,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:41,832 INFO L225 Difference]: With dead ends: 57810 [2021-01-20 11:42:41,832 INFO L226 Difference]: Without dead ends: 57330 [2021-01-20 11:42:41,832 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=759, Invalid=2781, Unknown=0, NotChecked=0, Total=3540 [2021-01-20 11:42:41,832 INFO L78 Accepts]: Start accepts. Automaton has 57330 states. Word has length 58 [2021-01-20 11:42:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:41,833 INFO L481 AbstractCegarLoop]: Abstraction has 57330 states. [2021-01-20 11:42:41,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 57330 states. [2021-01-20 11:42:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:42:42,007 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:42,007 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:42,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:42,208 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:42,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:42,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1692519938, now seen corresponding path program 9 times [2021-01-20 11:42:42,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:42,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699452529] [2021-01-20 11:42:42,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:42,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699452529] [2021-01-20 11:42:42,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238292781] [2021-01-20 11:42:42,970 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:43,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 11:42:43,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:43,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:42:43,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:43,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:42:43,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:43,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:43,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:42:43,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251279603] [2021-01-20 11:42:43,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:42:43,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:43,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:42:43,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:42:43,680 INFO L87 Difference]: Start difference. First operand 57330 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:49,154 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2021-01-20 11:42:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:49,821 INFO L93 Difference]: Finished difference Result 59760 states and 132133 transitions. [2021-01-20 11:42:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-20 11:42:49,826 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:42:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:49,890 INFO L225 Difference]: With dead ends: 59760 [2021-01-20 11:42:49,891 INFO L226 Difference]: Without dead ends: 59120 [2021-01-20 11:42:49,891 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=942, Invalid=3218, Unknown=0, NotChecked=0, Total=4160 [2021-01-20 11:42:49,891 INFO L78 Accepts]: Start accepts. Automaton has 59120 states. Word has length 58 [2021-01-20 11:42:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:49,891 INFO L481 AbstractCegarLoop]: Abstraction has 59120 states. [2021-01-20 11:42:49,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 59120 states. [2021-01-20 11:42:49,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:42:49,918 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:49,918 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:50,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-01-20 11:42:50,134 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:50,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1400237682, now seen corresponding path program 63 times [2021-01-20 11:42:50,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:50,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29325500] [2021-01-20 11:42:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:50,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29325500] [2021-01-20 11:42:50,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353180984] [2021-01-20 11:42:50,702 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:50,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:42:50,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:50,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:42:50,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:51,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:51,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:51,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:42:51,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098096098] [2021-01-20 11:42:51,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:42:51,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:51,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:42:51,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:42:51,612 INFO L87 Difference]: Start difference. First operand 59120 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:53,646 INFO L93 Difference]: Finished difference Result 59712 states and 131649 transitions. [2021-01-20 11:42:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:42:53,652 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:42:53,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:53,722 INFO L225 Difference]: With dead ends: 59712 [2021-01-20 11:42:53,722 INFO L226 Difference]: Without dead ends: 59560 [2021-01-20 11:42:53,722 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 11:42:53,722 INFO L78 Accepts]: Start accepts. Automaton has 59560 states. Word has length 58 [2021-01-20 11:42:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:53,722 INFO L481 AbstractCegarLoop]: Abstraction has 59560 states. [2021-01-20 11:42:53,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:53,722 INFO L276 IsEmpty]: Start isEmpty. Operand 59560 states. [2021-01-20 11:42:53,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:42:53,756 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:53,757 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:53,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-01-20 11:42:53,957 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:53,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:53,958 INFO L82 PathProgramCache]: Analyzing trace with hash 828546426, now seen corresponding path program 64 times [2021-01-20 11:42:53,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:53,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503828489] [2021-01-20 11:42:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:54,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503828489] [2021-01-20 11:42:54,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194663555] [2021-01-20 11:42:54,533 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:54,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:42:54,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:54,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:42:54,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:55,573 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:55,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:55,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:55,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:55,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:42:55,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641714367] [2021-01-20 11:42:55,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:42:55,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:55,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:42:55,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:42:55,745 INFO L87 Difference]: Start difference. First operand 59560 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:58,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:58,476 INFO L93 Difference]: Finished difference Result 60112 states and 132449 transitions. [2021-01-20 11:42:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:42:58,482 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:42:58,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:58,557 INFO L225 Difference]: With dead ends: 60112 [2021-01-20 11:42:58,557 INFO L226 Difference]: Without dead ends: 59960 [2021-01-20 11:42:58,558 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:42:58,558 INFO L78 Accepts]: Start accepts. Automaton has 59960 states. Word has length 58 [2021-01-20 11:42:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:58,558 INFO L481 AbstractCegarLoop]: Abstraction has 59960 states. [2021-01-20 11:42:58,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 59960 states. [2021-01-20 11:42:58,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:42:58,593 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:58,593 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:58,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:58,793 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:58,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:58,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1273779074, now seen corresponding path program 65 times [2021-01-20 11:42:58,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:58,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647083621] [2021-01-20 11:42:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:59,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647083621] [2021-01-20 11:42:59,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352817680] [2021-01-20 11:42:59,393 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:59,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:42:59,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:42:59,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:43:00,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:00,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:43:00,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:43:00,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9345088] [2021-01-20 11:43:00,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:43:00,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:43:00,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:43:00,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:43:00,308 INFO L87 Difference]: Start difference. First operand 59960 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:02,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:43:02,916 INFO L93 Difference]: Finished difference Result 60312 states and 132849 transitions. [2021-01-20 11:43:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:43:02,922 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:43:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:43:03,031 INFO L225 Difference]: With dead ends: 60312 [2021-01-20 11:43:03,032 INFO L226 Difference]: Without dead ends: 60160 [2021-01-20 11:43:03,032 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 11:43:03,032 INFO L78 Accepts]: Start accepts. Automaton has 60160 states. Word has length 58 [2021-01-20 11:43:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:43:03,032 INFO L481 AbstractCegarLoop]: Abstraction has 60160 states. [2021-01-20 11:43:03,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:03,033 INFO L276 IsEmpty]: Start isEmpty. Operand 60160 states. [2021-01-20 11:43:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:43:03,083 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:43:03,084 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:43:03,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:03,296 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:43:03,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:43:03,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1845470330, now seen corresponding path program 66 times [2021-01-20 11:43:03,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:43:03,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474211510] [2021-01-20 11:43:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:43:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:03,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474211510] [2021-01-20 11:43:03,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354833517] [2021-01-20 11:43:03,944 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:04,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:43:04,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:43:04,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:43:04,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:43:04,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:04,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:04,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:05,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:43:05,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:43:05,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964545867] [2021-01-20 11:43:05,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:43:05,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:43:05,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:43:05,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:43:05,084 INFO L87 Difference]: Start difference. First operand 60160 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:07,660 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 13 [2021-01-20 11:43:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:43:08,692 INFO L93 Difference]: Finished difference Result 60432 states and 133089 transitions. [2021-01-20 11:43:08,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:43:08,699 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:43:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:43:08,798 INFO L225 Difference]: With dead ends: 60432 [2021-01-20 11:43:08,798 INFO L226 Difference]: Without dead ends: 60280 [2021-01-20 11:43:08,799 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:43:08,799 INFO L78 Accepts]: Start accepts. Automaton has 60280 states. Word has length 58 [2021-01-20 11:43:08,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:43:08,799 INFO L481 AbstractCegarLoop]: Abstraction has 60280 states. [2021-01-20 11:43:08,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:08,799 INFO L276 IsEmpty]: Start isEmpty. Operand 60280 states. [2021-01-20 11:43:08,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:43:08,844 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:43:08,844 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:43:09,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:09,057 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:43:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:43:09,058 INFO L82 PathProgramCache]: Analyzing trace with hash -972406242, now seen corresponding path program 67 times [2021-01-20 11:43:09,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:43:09,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343800530] [2021-01-20 11:43:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:43:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:09,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343800530] [2021-01-20 11:43:09,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477582532] [2021-01-20 11:43:09,657 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:09,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:43:09,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:43:10,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:10,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:43:10,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:43:10,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959445499] [2021-01-20 11:43:10,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:43:10,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:43:10,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:43:10,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:43:10,692 INFO L87 Difference]: Start difference. First operand 60280 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:13,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:43:13,254 INFO L93 Difference]: Finished difference Result 60472 states and 133169 transitions. [2021-01-20 11:43:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:43:13,261 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:43:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:43:13,338 INFO L225 Difference]: With dead ends: 60472 [2021-01-20 11:43:13,338 INFO L226 Difference]: Without dead ends: 60320 [2021-01-20 11:43:13,338 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=262, Invalid=928, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 11:43:13,339 INFO L78 Accepts]: Start accepts. Automaton has 60320 states. Word has length 58 [2021-01-20 11:43:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:43:13,339 INFO L481 AbstractCegarLoop]: Abstraction has 60320 states. [2021-01-20 11:43:13,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 60320 states. [2021-01-20 11:43:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:43:13,378 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:43:13,378 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:43:13,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:13,579 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:43:13,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:43:13,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1544097498, now seen corresponding path program 68 times [2021-01-20 11:43:13,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:43:13,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874383813] [2021-01-20 11:43:13,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:43:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:14,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874383813] [2021-01-20 11:43:14,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886067005] [2021-01-20 11:43:14,104 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:14,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:43:14,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:43:14,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:43:14,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:43:15,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:15,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:15,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:15,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:43:15,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:43:15,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508621081] [2021-01-20 11:43:15,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:43:15,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:43:15,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:43:15,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:43:15,200 INFO L87 Difference]: Start difference. First operand 60320 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:18,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:43:18,816 INFO L93 Difference]: Finished difference Result 60592 states and 133409 transitions. [2021-01-20 11:43:18,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:43:18,823 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:43:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:43:18,937 INFO L225 Difference]: With dead ends: 60592 [2021-01-20 11:43:18,938 INFO L226 Difference]: Without dead ends: 60440 [2021-01-20 11:43:18,938 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:43:18,938 INFO L78 Accepts]: Start accepts. Automaton has 60440 states. Word has length 58 [2021-01-20 11:43:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:43:18,938 INFO L481 AbstractCegarLoop]: Abstraction has 60440 states. [2021-01-20 11:43:18,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:18,939 INFO L276 IsEmpty]: Start isEmpty. Operand 60440 states. [2021-01-20 11:43:18,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:43:18,989 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:43:18,990 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:43:19,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:19,205 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:43:19,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:43:19,206 INFO L82 PathProgramCache]: Analyzing trace with hash -89060534, now seen corresponding path program 69 times [2021-01-20 11:43:19,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:43:19,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665352388] [2021-01-20 11:43:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:43:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:19,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665352388] [2021-01-20 11:43:19,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660626729] [2021-01-20 11:43:19,864 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:19,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:43:19,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:43:19,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:43:19,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:43:21,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:21,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:43:21,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:43:21,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471884352] [2021-01-20 11:43:21,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:43:21,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:43:21,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:43:21,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:43:21,224 INFO L87 Difference]: Start difference. First operand 60440 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:24,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:43:24,370 INFO L93 Difference]: Finished difference Result 60632 states and 133489 transitions. [2021-01-20 11:43:24,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:43:24,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:43:24,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:43:24,479 INFO L225 Difference]: With dead ends: 60632 [2021-01-20 11:43:24,479 INFO L226 Difference]: Without dead ends: 60480 [2021-01-20 11:43:24,479 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:43:24,480 INFO L78 Accepts]: Start accepts. Automaton has 60480 states. Word has length 58 [2021-01-20 11:43:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:43:24,480 INFO L481 AbstractCegarLoop]: Abstraction has 60480 states. [2021-01-20 11:43:24,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 60480 states. [2021-01-20 11:43:24,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:43:24,527 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:43:24,528 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:43:24,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:24,740 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:43:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:43:24,741 INFO L82 PathProgramCache]: Analyzing trace with hash -660751790, now seen corresponding path program 70 times [2021-01-20 11:43:24,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:43:24,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428163268] [2021-01-20 11:43:24,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:43:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:25,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428163268] [2021-01-20 11:43:25,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996848322] [2021-01-20 11:43:25,475 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:25,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:43:25,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:43:25,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:43:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:43:26,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:26,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:26,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:26,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:43:26,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:43:26,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789927585] [2021-01-20 11:43:26,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:43:26,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:43:26,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:43:26,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:43:26,610 INFO L87 Difference]: Start difference. First operand 60480 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:28,138 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-01-20 11:43:28,620 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-01-20 11:43:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:43:30,706 INFO L93 Difference]: Finished difference Result 60752 states and 133729 transitions. [2021-01-20 11:43:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 11:43:30,712 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:43:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:43:30,789 INFO L225 Difference]: With dead ends: 60752 [2021-01-20 11:43:30,789 INFO L226 Difference]: Without dead ends: 60600 [2021-01-20 11:43:30,789 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=414, Invalid=1478, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 11:43:30,790 INFO L78 Accepts]: Start accepts. Automaton has 60600 states. Word has length 58 [2021-01-20 11:43:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:43:30,790 INFO L481 AbstractCegarLoop]: Abstraction has 60600 states. [2021-01-20 11:43:30,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 60600 states. [2021-01-20 11:43:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:43:30,826 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:43:30,826 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:43:31,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:31,027 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:43:31,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:43:31,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1784400226, now seen corresponding path program 71 times [2021-01-20 11:43:31,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:43:31,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347268664] [2021-01-20 11:43:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:43:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:31,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347268664] [2021-01-20 11:43:31,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168488387] [2021-01-20 11:43:31,573 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:31,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:43:31,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:43:31,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:43:31,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:43:32,346 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-01-20 11:43:32,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:32,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:43:32,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:43:32,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013005435] [2021-01-20 11:43:32,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:43:32,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:43:32,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:43:32,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:43:32,729 INFO L87 Difference]: Start difference. First operand 60600 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:43:36,245 INFO L93 Difference]: Finished difference Result 60792 states and 133809 transitions. [2021-01-20 11:43:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:43:36,251 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:43:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:43:36,367 INFO L225 Difference]: With dead ends: 60792 [2021-01-20 11:43:36,368 INFO L226 Difference]: Without dead ends: 60640 [2021-01-20 11:43:36,368 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=347, Invalid=1213, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:43:36,368 INFO L78 Accepts]: Start accepts. Automaton has 60640 states. Word has length 58 [2021-01-20 11:43:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:43:36,370 INFO L481 AbstractCegarLoop]: Abstraction has 60640 states. [2021-01-20 11:43:36,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:36,370 INFO L276 IsEmpty]: Start isEmpty. Operand 60640 states. [2021-01-20 11:43:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:43:36,420 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:43:36,421 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:43:36,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-01-20 11:43:36,634 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:43:36,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:43:36,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1639834552, now seen corresponding path program 72 times [2021-01-20 11:43:36,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:43:36,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423563767] [2021-01-20 11:43:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:43:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:37,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423563767] [2021-01-20 11:43:37,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297815243] [2021-01-20 11:43:37,301 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:37,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:43:37,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:43:37,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:43:37,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:43:38,143 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-01-20 11:43:38,233 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:38,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:43:38,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:43:38,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958884959] [2021-01-20 11:43:38,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:43:38,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:43:38,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:43:38,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:43:38,346 INFO L87 Difference]: Start difference. First operand 60640 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:40,931 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 15 [2021-01-20 11:43:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:43:42,321 INFO L93 Difference]: Finished difference Result 60872 states and 133969 transitions. [2021-01-20 11:43:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:43:42,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:43:42,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:43:42,429 INFO L225 Difference]: With dead ends: 60872 [2021-01-20 11:43:42,429 INFO L226 Difference]: Without dead ends: 60720 [2021-01-20 11:43:42,429 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=405, Invalid=1401, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:43:42,429 INFO L78 Accepts]: Start accepts. Automaton has 60720 states. Word has length 58 [2021-01-20 11:43:42,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:43:42,430 INFO L481 AbstractCegarLoop]: Abstraction has 60720 states. [2021-01-20 11:43:42,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:42,430 INFO L276 IsEmpty]: Start isEmpty. Operand 60720 states. [2021-01-20 11:43:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:43:42,475 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:43:42,476 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:43:42,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:42,689 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:43:42,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:43:42,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1211717086, now seen corresponding path program 73 times [2021-01-20 11:43:42,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:43:42,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170575728] [2021-01-20 11:43:42,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:43:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:43,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170575728] [2021-01-20 11:43:43,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287088177] [2021-01-20 11:43:43,334 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:43,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:43:43,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:43:44,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:43:44,562 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:44,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:43:44,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:43:44,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354342203] [2021-01-20 11:43:44,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:43:44,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:43:44,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:43:44,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:43:44,577 INFO L87 Difference]: Start difference. First operand 60720 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:45,147 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-01-20 11:43:46,113 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-01-20 11:43:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:43:49,861 INFO L93 Difference]: Finished difference Result 62334 states and 137372 transitions. [2021-01-20 11:43:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 11:43:49,867 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:43:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:43:49,943 INFO L225 Difference]: With dead ends: 62334 [2021-01-20 11:43:49,944 INFO L226 Difference]: Without dead ends: 61970 [2021-01-20 11:43:49,944 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=649, Invalid=2213, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 11:43:49,944 INFO L78 Accepts]: Start accepts. Automaton has 61970 states. Word has length 58 [2021-01-20 11:43:49,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:43:49,944 INFO L481 AbstractCegarLoop]: Abstraction has 61970 states. [2021-01-20 11:43:49,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand 61970 states. [2021-01-20 11:43:49,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:43:49,974 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:43:49,974 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:43:50,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-01-20 11:43:50,186 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:43:50,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:43:50,186 INFO L82 PathProgramCache]: Analyzing trace with hash 384183672, now seen corresponding path program 74 times [2021-01-20 11:43:50,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:43:50,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833874421] [2021-01-20 11:43:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:43:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:50,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833874421] [2021-01-20 11:43:50,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203020644] [2021-01-20 11:43:50,767 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:50,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:43:50,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:43:50,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:43:50,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:43:51,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:51,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:51,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:51,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:43:51,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:43:51,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586801830] [2021-01-20 11:43:51,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:43:51,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:43:51,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:43:51,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:43:51,855 INFO L87 Difference]: Start difference. First operand 61970 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:53,340 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-01-20 11:43:56,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:43:56,335 INFO L93 Difference]: Finished difference Result 62242 states and 136994 transitions. [2021-01-20 11:43:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:43:56,341 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:43:56,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:43:56,457 INFO L225 Difference]: With dead ends: 62242 [2021-01-20 11:43:56,457 INFO L226 Difference]: Without dead ends: 62090 [2021-01-20 11:43:56,458 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 11:43:56,458 INFO L78 Accepts]: Start accepts. Automaton has 62090 states. Word has length 58 [2021-01-20 11:43:56,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:43:56,458 INFO L481 AbstractCegarLoop]: Abstraction has 62090 states. [2021-01-20 11:43:56,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:56,458 INFO L276 IsEmpty]: Start isEmpty. Operand 62090 states. [2021-01-20 11:43:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:43:56,507 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:43:56,507 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:43:56,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:56,720 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:43:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:43:56,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1097274800, now seen corresponding path program 75 times [2021-01-20 11:43:56,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:43:56,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386035108] [2021-01-20 11:43:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:43:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:57,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386035108] [2021-01-20 11:43:57,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855554533] [2021-01-20 11:43:57,450 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:43:57,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:43:57,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:43:57,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:43:57,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:43:58,361 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-01-20 11:43:58,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:58,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:58,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:58,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:43:58,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:43:58,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065086321] [2021-01-20 11:43:58,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:43:58,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:43:58,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:43:58,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:43:58,664 INFO L87 Difference]: Start difference. First operand 62090 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:00,208 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 14 [2021-01-20 11:44:00,442 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-01-20 11:44:01,644 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-01-20 11:44:02,353 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-01-20 11:44:04,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:44:04,550 INFO L93 Difference]: Finished difference Result 62362 states and 137234 transitions. [2021-01-20 11:44:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-20 11:44:04,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:44:04,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:44:04,660 INFO L225 Difference]: With dead ends: 62362 [2021-01-20 11:44:04,661 INFO L226 Difference]: Without dead ends: 62210 [2021-01-20 11:44:04,661 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=646, Invalid=2216, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 11:44:04,661 INFO L78 Accepts]: Start accepts. Automaton has 62210 states. Word has length 58 [2021-01-20 11:44:04,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:44:04,662 INFO L481 AbstractCegarLoop]: Abstraction has 62210 states. [2021-01-20 11:44:04,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:04,662 INFO L276 IsEmpty]: Start isEmpty. Operand 62210 states. [2021-01-20 11:44:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:44:04,707 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:44:04,707 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:44:04,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-01-20 11:44:04,920 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:44:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:44:04,921 INFO L82 PathProgramCache]: Analyzing trace with hash 669157334, now seen corresponding path program 76 times [2021-01-20 11:44:04,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:44:04,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251819911] [2021-01-20 11:44:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:44:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:44:05,330 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-20 11:44:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:06,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251819911] [2021-01-20 11:44:06,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036046808] [2021-01-20 11:44:06,097 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:44:06,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:44:06,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:44:06,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:44:06,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:44:07,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:44:07,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:07,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:44:07,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:44:07,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925417767] [2021-01-20 11:44:07,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:44:07,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:44:07,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:44:07,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:44:07,318 INFO L87 Difference]: Start difference. First operand 62210 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:07,849 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-01-20 11:44:08,781 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-01-20 11:44:10,341 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-01-20 11:44:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:44:14,353 INFO L93 Difference]: Finished difference Result 65054 states and 143572 transitions. [2021-01-20 11:44:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-20 11:44:14,359 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:44:14,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:44:14,443 INFO L225 Difference]: With dead ends: 65054 [2021-01-20 11:44:14,443 INFO L226 Difference]: Without dead ends: 64690 [2021-01-20 11:44:14,444 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=929, Invalid=3361, Unknown=0, NotChecked=0, Total=4290 [2021-01-20 11:44:14,444 INFO L78 Accepts]: Start accepts. Automaton has 64690 states. Word has length 58 [2021-01-20 11:44:14,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:44:14,444 INFO L481 AbstractCegarLoop]: Abstraction has 64690 states. [2021-01-20 11:44:14,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 64690 states. [2021-01-20 11:44:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:44:14,478 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:44:14,478 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:44:14,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-01-20 11:44:14,679 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:44:14,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:44:14,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1142254788, now seen corresponding path program 77 times [2021-01-20 11:44:14,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:44:14,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340692003] [2021-01-20 11:44:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:44:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:44:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:15,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340692003] [2021-01-20 11:44:15,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656319274] [2021-01-20 11:44:15,243 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:44:15,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:44:15,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:44:15,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:44:15,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:44:16,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:16,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:44:16,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:44:16,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667631607] [2021-01-20 11:44:16,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:44:16,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:44:16,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:44:16,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:44:16,219 INFO L87 Difference]: Start difference. First operand 64690 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:20,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:44:20,635 INFO L93 Difference]: Finished difference Result 65752 states and 144869 transitions. [2021-01-20 11:44:20,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:44:20,642 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:44:20,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:44:20,764 INFO L225 Difference]: With dead ends: 65752 [2021-01-20 11:44:20,764 INFO L226 Difference]: Without dead ends: 65600 [2021-01-20 11:44:20,764 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:44:20,764 INFO L78 Accepts]: Start accepts. Automaton has 65600 states. Word has length 58 [2021-01-20 11:44:20,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:44:20,765 INFO L481 AbstractCegarLoop]: Abstraction has 65600 states. [2021-01-20 11:44:20,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 65600 states. [2021-01-20 11:44:20,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:44:20,815 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:44:20,815 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:44:21,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-01-20 11:44:21,029 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:44:21,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:44:21,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1898255560, now seen corresponding path program 78 times [2021-01-20 11:44:21,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:44:21,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618855471] [2021-01-20 11:44:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:44:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:44:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:21,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618855471] [2021-01-20 11:44:21,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486438606] [2021-01-20 11:44:21,699 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:44:21,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:44:21,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:44:21,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:44:21,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:44:22,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:44:22,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:22,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:44:22,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:44:22,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395377440] [2021-01-20 11:44:22,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:44:22,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:44:22,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:44:22,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:44:22,650 INFO L87 Difference]: Start difference. First operand 65600 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:24,821 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-01-20 11:44:25,320 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-01-20 11:44:25,665 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-01-20 11:44:25,856 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2021-01-20 11:44:28,285 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-01-20 11:44:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:44:29,380 INFO L93 Difference]: Finished difference Result 68244 states and 150807 transitions. [2021-01-20 11:44:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-20 11:44:29,386 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:44:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:44:29,505 INFO L225 Difference]: With dead ends: 68244 [2021-01-20 11:44:29,505 INFO L226 Difference]: Without dead ends: 67880 [2021-01-20 11:44:29,506 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=801, Invalid=2621, Unknown=0, NotChecked=0, Total=3422 [2021-01-20 11:44:29,506 INFO L78 Accepts]: Start accepts. Automaton has 67880 states. Word has length 58 [2021-01-20 11:44:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:44:29,506 INFO L481 AbstractCegarLoop]: Abstraction has 67880 states. [2021-01-20 11:44:29,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 67880 states. [2021-01-20 11:44:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:44:29,746 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:44:29,746 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1] [2021-01-20 11:44:29,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:44:29,947 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:44:29,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:44:29,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1735535381, now seen corresponding path program 9 times [2021-01-20 11:44:29,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:44:29,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227980466] [2021-01-20 11:44:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:44:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:44:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:30,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227980466] [2021-01-20 11:44:30,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295165994] [2021-01-20 11:44:30,687 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:44:30,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 11:44:30,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:44:30,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:44:30,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:44:31,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:31,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:44:31,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:44:31,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191523368] [2021-01-20 11:44:31,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:44:31,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:44:31,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:44:31,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:44:31,968 INFO L87 Difference]: Start difference. First operand 67880 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:33,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:44:33,775 INFO L93 Difference]: Finished difference Result 68072 states and 150269 transitions. [2021-01-20 11:44:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 11:44:33,781 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2021-01-20 11:44:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:44:33,871 INFO L225 Difference]: With dead ends: 68072 [2021-01-20 11:44:33,871 INFO L226 Difference]: Without dead ends: 67920 [2021-01-20 11:44:33,872 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-01-20 11:44:33,872 INFO L78 Accepts]: Start accepts. Automaton has 67920 states. Word has length 63 [2021-01-20 11:44:33,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:44:33,872 INFO L481 AbstractCegarLoop]: Abstraction has 67920 states. [2021-01-20 11:44:33,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:33,872 INFO L276 IsEmpty]: Start isEmpty. Operand 67920 states. [2021-01-20 11:44:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:44:33,930 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:44:33,930 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1] [2021-01-20 11:44:34,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-01-20 11:44:34,130 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:44:34,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:44:34,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1555465405, now seen corresponding path program 10 times [2021-01-20 11:44:34,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:44:34,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402459593] [2021-01-20 11:44:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:44:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:44:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:34,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402459593] [2021-01-20 11:44:34,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943013752] [2021-01-20 11:44:34,861 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:44:34,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:44:34,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:44:34,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:44:34,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:44:35,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:44:36,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:36,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:44:36,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:44:36,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238617736] [2021-01-20 11:44:36,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:44:36,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:44:36,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:44:36,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:44:36,135 INFO L87 Difference]: Start difference. First operand 67920 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:40,173 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-01-20 11:44:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:44:41,045 INFO L93 Difference]: Finished difference Result 69040 states and 152717 transitions. [2021-01-20 11:44:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 11:44:41,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2021-01-20 11:44:41,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:44:41,375 INFO L225 Difference]: With dead ends: 69040 [2021-01-20 11:44:41,375 INFO L226 Difference]: Without dead ends: 68500 [2021-01-20 11:44:41,376 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=482, Invalid=1870, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 11:44:41,376 INFO L78 Accepts]: Start accepts. Automaton has 68500 states. Word has length 63 [2021-01-20 11:44:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:44:41,376 INFO L481 AbstractCegarLoop]: Abstraction has 68500 states. [2021-01-20 11:44:41,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 68500 states. [2021-01-20 11:44:41,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:44:41,445 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:44:41,445 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:44:41,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:44:41,659 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:44:41,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:44:41,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1241373133, now seen corresponding path program 79 times [2021-01-20 11:44:41,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:44:41,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644591912] [2021-01-20 11:44:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:44:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:44:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:42,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644591912] [2021-01-20 11:44:42,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120030820] [2021-01-20 11:44:42,421 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:44:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:44:42,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:44:42,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:44:43,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:43,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:43,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:44,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:44:44,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:44:44,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134505888] [2021-01-20 11:44:44,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:44:44,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:44:44,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:44:44,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:44:44,024 INFO L87 Difference]: Start difference. First operand 68500 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:44,801 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-01-20 11:44:45,280 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-01-20 11:44:45,682 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-01-20 11:44:46,755 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-01-20 11:44:47,157 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-01-20 11:44:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:44:48,067 INFO L93 Difference]: Finished difference Result 68812 states and 151939 transitions. [2021-01-20 11:44:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:44:48,074 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2021-01-20 11:44:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:44:48,193 INFO L225 Difference]: With dead ends: 68812 [2021-01-20 11:44:48,193 INFO L226 Difference]: Without dead ends: 68660 [2021-01-20 11:44:48,193 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=371, Invalid=1269, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:44:48,193 INFO L78 Accepts]: Start accepts. Automaton has 68660 states. Word has length 63 [2021-01-20 11:44:48,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:44:48,194 INFO L481 AbstractCegarLoop]: Abstraction has 68660 states. [2021-01-20 11:44:48,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 68660 states. [2021-01-20 11:44:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:44:48,266 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:44:48,266 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:44:48,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-01-20 11:44:48,480 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:44:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:44:48,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1784254887, now seen corresponding path program 80 times [2021-01-20 11:44:48,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:44:48,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792230538] [2021-01-20 11:44:48,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:44:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:44:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:49,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792230538] [2021-01-20 11:44:49,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846870178] [2021-01-20 11:44:49,262 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:44:49,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:44:49,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:44:49,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:44:49,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:44:50,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:50,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:50,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:50,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:44:50,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:44:50,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343547225] [2021-01-20 11:44:50,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:44:50,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:44:50,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:44:50,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:44:50,748 INFO L87 Difference]: Start difference. First operand 68660 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:51,595 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-01-20 11:44:52,454 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-01-20 11:44:52,700 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-01-20 11:44:54,003 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2021-01-20 11:44:55,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:44:55,084 INFO L93 Difference]: Finished difference Result 68972 states and 152259 transitions. [2021-01-20 11:44:55,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 11:44:55,091 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2021-01-20 11:44:55,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:44:55,434 INFO L225 Difference]: With dead ends: 68972 [2021-01-20 11:44:55,434 INFO L226 Difference]: Without dead ends: 68820 [2021-01-20 11:44:55,434 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=412, Invalid=1568, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 11:44:55,435 INFO L78 Accepts]: Start accepts. Automaton has 68820 states. Word has length 63 [2021-01-20 11:44:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:44:55,435 INFO L481 AbstractCegarLoop]: Abstraction has 68820 states. [2021-01-20 11:44:55,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:55,435 INFO L276 IsEmpty]: Start isEmpty. Operand 68820 states. [2021-01-20 11:44:55,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:44:55,507 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:44:55,507 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:44:55,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:44:55,720 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:44:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:44:55,721 INFO L82 PathProgramCache]: Analyzing trace with hash -788631545, now seen corresponding path program 81 times [2021-01-20 11:44:55,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:44:55,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634616797] [2021-01-20 11:44:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:44:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:44:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:56,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634616797] [2021-01-20 11:44:56,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538268730] [2021-01-20 11:44:56,449 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:44:56,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 11:44:56,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:44:56,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:44:56,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:44:57,645 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-01-20 11:44:57,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:57,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:57,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:57,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:57,779 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:57,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:57,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:57,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:57,937 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-01-20 11:44:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:58,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:44:58,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:44:58,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977012748] [2021-01-20 11:44:58,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:44:58,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:44:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:44:58,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:44:58,047 INFO L87 Difference]: Start difference. First operand 68820 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:58,742 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 12 [2021-01-20 11:44:58,991 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-01-20 11:44:59,635 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-01-20 11:44:59,812 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 14 [2021-01-20 11:45:00,069 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-01-20 11:45:00,317 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-01-20 11:45:00,987 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 14 [2021-01-20 11:45:02,062 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2021-01-20 11:45:02,885 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-01-20 11:45:03,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:45:03,763 INFO L93 Difference]: Finished difference Result 69012 states and 152339 transitions. [2021-01-20 11:45:03,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 11:45:03,769 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2021-01-20 11:45:03,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:45:03,890 INFO L225 Difference]: With dead ends: 69012 [2021-01-20 11:45:03,890 INFO L226 Difference]: Without dead ends: 68860 [2021-01-20 11:45:03,891 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=499, Invalid=1757, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:45:03,891 INFO L78 Accepts]: Start accepts. Automaton has 68860 states. Word has length 63 [2021-01-20 11:45:03,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:45:03,891 INFO L481 AbstractCegarLoop]: Abstraction has 68860 states. [2021-01-20 11:45:03,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:45:03,891 INFO L276 IsEmpty]: Start isEmpty. Operand 68860 states. [2021-01-20 11:45:03,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:45:03,965 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:45:03,965 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:45:04,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:45:04,180 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:45:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:45:04,181 INFO L82 PathProgramCache]: Analyzing trace with hash -32630773, now seen corresponding path program 82 times [2021-01-20 11:45:04,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:45:04,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763447655] [2021-01-20 11:45:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:45:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:45:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:45:04,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763447655] [2021-01-20 11:45:04,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473098565] [2021-01-20 11:45:04,993 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:45:05,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:45:05,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:45:05,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:45:05,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:45:06,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:45:06,694 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 Received shutdown request... [2021-01-20 11:45:11,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-01-20 11:45:11,058 WARN L546 AbstractCegarLoop]: Verification canceled [2021-01-20 11:45:11,063 WARN L250 ceAbstractionStarter]: Timeout [2021-01-20 11:45:11,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 11:45:11 BasicIcfg [2021-01-20 11:45:11,063 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-20 11:45:11,064 INFO L168 Benchmark]: Toolchain (without parser) took 764804.80 ms. Allocated memory was 310.4 MB in the beginning and 4.2 GB in the end (delta: 3.9 GB). Free memory was 285.6 MB in the beginning and 1.2 GB in the end (delta: -896.7 MB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. [2021-01-20 11:45:11,064 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 310.4 MB. Free memory is still 280.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-01-20 11:45:11,064 INFO L168 Benchmark]: CACSL2BoogieTranslator took 794.26 ms. Allocated memory is still 310.4 MB. Free memory was 285.3 MB in the beginning and 256.6 MB in the end (delta: 28.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2021-01-20 11:45:11,065 INFO L168 Benchmark]: Boogie Procedure Inliner took 95.65 ms. Allocated memory is still 310.4 MB. Free memory was 256.4 MB in the beginning and 254.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-20 11:45:11,065 INFO L168 Benchmark]: Boogie Preprocessor took 69.11 ms. Allocated memory is still 310.4 MB. Free memory was 254.5 MB in the beginning and 253.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-01-20 11:45:11,065 INFO L168 Benchmark]: RCFGBuilder took 561.99 ms. Allocated memory is still 310.4 MB. Free memory was 253.3 MB in the beginning and 274.6 MB in the end (delta: -21.3 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. [2021-01-20 11:45:11,066 INFO L168 Benchmark]: TraceAbstraction took 763272.48 ms. Allocated memory was 310.4 MB in the beginning and 4.2 GB in the end (delta: 3.9 GB). Free memory was 274.6 MB in the beginning and 1.2 GB in the end (delta: -907.7 MB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. [2021-01-20 11:45:11,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 310.4 MB. Free memory is still 280.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 794.26 ms. Allocated memory is still 310.4 MB. Free memory was 285.3 MB in the beginning and 256.6 MB in the end (delta: 28.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 95.65 ms. Allocated memory is still 310.4 MB. Free memory was 256.4 MB in the beginning and 254.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 69.11 ms. Allocated memory is still 310.4 MB. Free memory was 254.5 MB in the beginning and 253.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 561.99 ms. Allocated memory is still 310.4 MB. Free memory was 253.3 MB in the beginning and 274.6 MB in the end (delta: -21.3 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 763272.48 ms. Allocated memory was 310.4 MB in the beginning and 4.2 GB in the end (delta: 3.9 GB). Free memory was 274.6 MB in the beginning and 1.2 GB in the end (delta: -907.7 MB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 20]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 20). Cancelled while BasicCegarLoop was analyzing trace of length 64 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 22 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 763.1s, OverallIterations: 111, TraceHistogramMax: 6, AutomataDifference: 615.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 9841 SDtfs, 91896 SDslu, 118608 SDs, 0 SdLazy, 20041 SolverSat, 6682 SolverUnsat, 128 SolverUnknown, 0 SolverNotchecked, 280.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9289 GetRequests, 4931 SyntacticMatches, 26 SemanticMatches, 4332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56399 ImplicationChecksByTransitivity, 363.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68860occurred in iteration=110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 104.0s InterpolantComputationTime, 11599 NumberOfCodeBlocks, 11599 NumberOfCodeBlocksAsserted, 362 NumberOfCheckSat, 11386 ConstructedInterpolants, 6 QuantifiedInterpolants, 4892259 SizeOfPredicates, 424 NumberOfNonLiveVariables, 13939 ConjunctsInSsa, 1304 ConjunctsInUnsatCore, 213 InterpolantComputations, 7 PerfectInterpolantSequences, 0/3944 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown