/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-keepdead.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-e5469eb [2021-01-20 17:49:05,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-20 17:49:05,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-20 17:49:05,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-20 17:49:05,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-20 17:49:05,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-20 17:49:05,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-20 17:49:05,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-20 17:49:05,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-20 17:49:05,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-20 17:49:05,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-20 17:49:05,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-20 17:49:05,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-20 17:49:05,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-20 17:49:05,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-20 17:49:05,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-20 17:49:05,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-20 17:49:05,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-20 17:49:05,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-20 17:49:05,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-20 17:49:05,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-20 17:49:05,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-20 17:49:05,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-20 17:49:05,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-20 17:49:05,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-20 17:49:05,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-20 17:49:05,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-20 17:49:05,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-20 17:49:05,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-20 17:49:05,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-20 17:49:05,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-20 17:49:05,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-20 17:49:05,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-20 17:49:05,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-20 17:49:05,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-20 17:49:05,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-20 17:49:05,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-20 17:49:05,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-20 17:49:05,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-20 17:49:05,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-20 17:49:05,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-20 17:49:05,580 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-keepdead.epf [2021-01-20 17:49:05,611 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-20 17:49:05,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-20 17:49:05,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-20 17:49:05,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-20 17:49:05,614 INFO L138 SettingsManager]: * Use SBE=true [2021-01-20 17:49:05,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-20 17:49:05,614 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-20 17:49:05,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-20 17:49:05,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-20 17:49:05,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-20 17:49:05,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-20 17:49:05,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-20 17:49:05,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-20 17:49:05,616 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-20 17:49:05,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-20 17:49:05,616 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-20 17:49:05,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-20 17:49:05,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-20 17:49:05,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-20 17:49:05,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-20 17:49:05,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-20 17:49:05,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 17:49:05,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-20 17:49:05,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-20 17:49:05,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-20 17:49:05,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-20 17:49:05,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-20 17:49:05,619 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-20 17:49:05,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-20 17:49:05,619 INFO L138 SettingsManager]: * Remove dead ends from automaton=false [2021-01-20 17:49:05,620 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-20 17:49:05,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-20 17:49:06,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-20 17:49:06,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-20 17:49:06,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-20 17:49:06,059 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-20 17:49:06,060 INFO L275 PluginConnector]: CDTParser initialized [2021-01-20 17:49:06,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2021-01-20 17:49:06,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcf35f75e/702c9f3a263149ffa8ce8cb8456e4fb3/FLAG899310925 [2021-01-20 17:49:06,881 INFO L306 CDTParser]: Found 1 translation units. [2021-01-20 17:49:06,881 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2021-01-20 17:49:06,904 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcf35f75e/702c9f3a263149ffa8ce8cb8456e4fb3/FLAG899310925 [2021-01-20 17:49:07,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcf35f75e/702c9f3a263149ffa8ce8cb8456e4fb3 [2021-01-20 17:49:07,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-20 17:49:07,170 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-20 17:49:07,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-20 17:49:07,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-20 17:49:07,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-20 17:49:07,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d918d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07, skipping insertion in model container [2021-01-20 17:49:07,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-20 17:49:07,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-20 17:49:07,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 17:49:07,675 INFO L203 MainTranslator]: Completed pre-run [2021-01-20 17:49:07,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 17:49:07,820 INFO L208 MainTranslator]: Completed translation [2021-01-20 17:49:07,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07 WrapperNode [2021-01-20 17:49:07,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-20 17:49:07,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-20 17:49:07,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-20 17:49:07,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-20 17:49:07,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-20 17:49:07,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-20 17:49:07,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-20 17:49:07,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-20 17:49:07,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-20 17:49:07,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-20 17:49:07,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-20 17:49:07,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-20 17:49:07,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (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 17:49:08,019 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-20 17:49:08,019 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-20 17:49:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-20 17:49:08,020 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-20 17:49:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-20 17:49:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-20 17:49:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-20 17:49:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-20 17:49:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-20 17:49:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-20 17:49:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-20 17:49:08,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-20 17:49:08,023 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 17:49:08,556 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-20 17:49:08,556 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-20 17:49:08,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 05:49:08 BoogieIcfgContainer [2021-01-20 17:49:08,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-20 17:49:08,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-20 17:49:08,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-20 17:49:08,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-20 17:49:08,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 05:49:07" (1/3) ... [2021-01-20 17:49:08,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45322f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 05:49:08, skipping insertion in model container [2021-01-20 17:49:08,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (2/3) ... [2021-01-20 17:49:08,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45322f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 05:49:08, skipping insertion in model container [2021-01-20 17:49:08,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 05:49:08" (3/3) ... [2021-01-20 17:49:08,571 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2021-01-20 17:49:08,590 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-20 17:49:08,590 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-20 17:49:08,595 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-20 17:49:08,596 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-20 17:49:08,642 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,642 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,643 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,643 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,643 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,644 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,644 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,644 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,645 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,645 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,646 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,646 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,647 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,648 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,648 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,648 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,649 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,649 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,649 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,649 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,650 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,650 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,650 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,650 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,650 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,651 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,652 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,652 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,652 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,653 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,653 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,653 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,654 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,654 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,654 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,655 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,655 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,655 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,656 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,657 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,658 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,658 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,658 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,658 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,659 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,659 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,659 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,659 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,660 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,660 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,660 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,660 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,660 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,660 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,661 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,661 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,661 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,666 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,669 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,669 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,670 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,670 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,670 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,670 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,676 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,676 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,676 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,676 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,677 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,677 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,680 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-20 17:49:08,693 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-20 17:49:08,718 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-20 17:49:08,719 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-20 17:49:08,719 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-20 17:49:08,719 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-20 17:49:08,719 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-20 17:49:08,719 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-20 17:49:08,719 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-20 17:49:08,720 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-20 17:49:08,732 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2021-01-20 17:49:08,874 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 17:49:08,885 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 17:49:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-20 17:49:08,900 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:08,901 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 17:49:08,901 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:08,908 INFO L82 PathProgramCache]: Analyzing trace with hash 811106412, now seen corresponding path program 1 times [2021-01-20 17:49:08,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:08,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912971126] [2021-01-20 17:49:08,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:09,433 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 17:49:09,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912971126] [2021-01-20 17:49:09,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:09,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 17:49:09,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387721383] [2021-01-20 17:49:09,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 17:49:09,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:09,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 17:49:09,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 17:49:09,476 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 17:49:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:09,713 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2021-01-20 17:49:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 17:49:09,715 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 17:49:09,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:09,718 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 17:49:09,718 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 11738 transitions. Word has length 28 [2021-01-20 17:49:09,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:09,719 INFO L481 AbstractCegarLoop]: Abstraction has 4034 states and 11738 transitions. [2021-01-20 17:49:09,720 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 17:49:09,720 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 11738 transitions. [2021-01-20 17:49:09,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 17:49:09,730 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:09,730 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 17:49:09,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-20 17:49:09,731 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2008820546, now seen corresponding path program 1 times [2021-01-20 17:49:09,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:09,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833527842] [2021-01-20 17:49:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:09,915 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 17:49:09,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833527842] [2021-01-20 17:49:09,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:09,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 17:49:09,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473385324] [2021-01-20 17:49:09,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 17:49:09,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:09,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 17:49:09,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-20 17:49:09,919 INFO L87 Difference]: Start difference. First operand 4034 states and 11738 transitions. 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 17:49:10,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:10,137 INFO L93 Difference]: Finished difference Result 6170 states and 17930 transitions. [2021-01-20 17:49:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 17:49:10,138 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 17:49:10,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:10,139 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-01-20 17:49:10,139 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 17930 transitions. Word has length 33 [2021-01-20 17:49:10,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:10,140 INFO L481 AbstractCegarLoop]: Abstraction has 6170 states and 17930 transitions. [2021-01-20 17:49:10,140 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 17:49:10,140 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 17930 transitions. [2021-01-20 17:49:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 17:49:10,144 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:10,144 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 17:49:10,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-20 17:49:10,145 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:10,146 INFO L82 PathProgramCache]: Analyzing trace with hash 103991554, now seen corresponding path program 1 times [2021-01-20 17:49:10,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:10,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441480574] [2021-01-20 17:49:10,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:10,331 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 17:49:10,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441480574] [2021-01-20 17:49:10,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:10,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 17:49:10,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103441471] [2021-01-20 17:49:10,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 17:49:10,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:10,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 17:49:10,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-20 17:49:10,339 INFO L87 Difference]: Start difference. First operand 6170 states and 17930 transitions. 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 17:49:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:10,613 INFO L93 Difference]: Finished difference Result 7706 states and 22410 transitions. [2021-01-20 17:49:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-20 17:49:10,614 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 17:49:10,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:10,616 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-01-20 17:49:10,616 INFO L78 Accepts]: Start accepts. Automaton has 7706 states and 22410 transitions. Word has length 33 [2021-01-20 17:49:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:10,617 INFO L481 AbstractCegarLoop]: Abstraction has 7706 states and 22410 transitions. [2021-01-20 17:49:10,618 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 17:49:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 7706 states and 22410 transitions. [2021-01-20 17:49:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 17:49:10,623 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:10,623 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 17:49:10,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-20 17:49:10,624 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:10,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:10,626 INFO L82 PathProgramCache]: Analyzing trace with hash -899974956, now seen corresponding path program 2 times [2021-01-20 17:49:10,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:10,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112914832] [2021-01-20 17:49:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:10,818 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 17:49:10,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112914832] [2021-01-20 17:49:10,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:10,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 17:49:10,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614461983] [2021-01-20 17:49:10,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 17:49:10,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:10,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 17:49:10,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-20 17:49:10,821 INFO L87 Difference]: Start difference. First operand 7706 states and 22410 transitions. 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 17:49:11,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:11,079 INFO L93 Difference]: Finished difference Result 9242 states and 26890 transitions. [2021-01-20 17:49:11,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 17:49:11,080 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 17:49:11,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:11,081 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-01-20 17:49:11,081 INFO L78 Accepts]: Start accepts. Automaton has 9242 states and 26890 transitions. Word has length 33 [2021-01-20 17:49:11,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:11,082 INFO L481 AbstractCegarLoop]: Abstraction has 9242 states and 26890 transitions. [2021-01-20 17:49:11,082 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 17:49:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 9242 states and 26890 transitions. [2021-01-20 17:49:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:11,091 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:11,091 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 17:49:11,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-20 17:49:11,092 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:11,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:11,092 INFO L82 PathProgramCache]: Analyzing trace with hash -421493469, now seen corresponding path program 1 times [2021-01-20 17:49:11,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:11,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976032632] [2021-01-20 17:49:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:11,273 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 17:49:11,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976032632] [2021-01-20 17:49:11,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020893484] [2021-01-20 17:49:11,274 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 17:49:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:11,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 17:49:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:11,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:11,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:11,557 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 17:49:11,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:11,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-20 17:49:11,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057289371] [2021-01-20 17:49:11,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 17:49:11,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:11,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 17:49:11,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-20 17:49:11,560 INFO L87 Difference]: Start difference. First operand 9242 states and 26890 transitions. 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 17:49:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:12,070 INFO L93 Difference]: Finished difference Result 14090 states and 40938 transitions. [2021-01-20 17:49:12,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 17:49:12,071 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 17:49:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:12,072 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2021-01-20 17:49:12,072 INFO L78 Accepts]: Start accepts. Automaton has 14090 states and 40938 transitions. Word has length 38 [2021-01-20 17:49:12,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:12,073 INFO L481 AbstractCegarLoop]: Abstraction has 14090 states and 40938 transitions. [2021-01-20 17:49:12,073 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 17:49:12,073 INFO L276 IsEmpty]: Start isEmpty. Operand 14090 states and 40938 transitions. [2021-01-20 17:49:12,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:12,082 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:12,082 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 17:49:12,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:12,297 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:12,297 INFO L82 PathProgramCache]: Analyzing trace with hash -869705744, now seen corresponding path program 1 times [2021-01-20 17:49:12,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:12,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222397857] [2021-01-20 17:49:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:12,486 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 17:49:12,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222397857] [2021-01-20 17:49:12,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:12,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 17:49:12,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658407391] [2021-01-20 17:49:12,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 17:49:12,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:12,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 17:49:12,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-20 17:49:12,489 INFO L87 Difference]: Start difference. First operand 14090 states and 40938 transitions. 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 17:49:12,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:12,790 INFO L93 Difference]: Finished difference Result 14922 states and 43370 transitions. [2021-01-20 17:49:12,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 17:49:12,791 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 17:49:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:12,792 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-01-20 17:49:12,792 INFO L78 Accepts]: Start accepts. Automaton has 14922 states and 43370 transitions. Word has length 38 [2021-01-20 17:49:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:12,793 INFO L481 AbstractCegarLoop]: Abstraction has 14922 states and 43370 transitions. [2021-01-20 17:49:12,793 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 17:49:12,793 INFO L276 IsEmpty]: Start isEmpty. Operand 14922 states and 43370 transitions. [2021-01-20 17:49:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:12,804 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:12,804 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 17:49:12,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-20 17:49:12,804 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:12,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1873672254, now seen corresponding path program 2 times [2021-01-20 17:49:12,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:12,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635087610] [2021-01-20 17:49:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:12,972 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 17:49:12,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635087610] [2021-01-20 17:49:12,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:12,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 17:49:12,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869547827] [2021-01-20 17:49:12,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 17:49:12,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:12,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 17:49:12,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-20 17:49:12,980 INFO L87 Difference]: Start difference. First operand 14922 states and 43370 transitions. 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 17:49:13,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:13,508 INFO L93 Difference]: Finished difference Result 18506 states and 53802 transitions. [2021-01-20 17:49:13,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 17:49:13,509 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 17:49:13,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:13,510 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:13,510 INFO L78 Accepts]: Start accepts. Automaton has 18506 states and 53802 transitions. Word has length 38 [2021-01-20 17:49:13,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:13,511 INFO L481 AbstractCegarLoop]: Abstraction has 18506 states and 53802 transitions. [2021-01-20 17:49:13,511 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 17:49:13,511 INFO L276 IsEmpty]: Start isEmpty. Operand 18506 states and 53802 transitions. [2021-01-20 17:49:13,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:13,523 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:13,523 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 17:49:13,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-20 17:49:13,524 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:13,524 INFO L82 PathProgramCache]: Analyzing trace with hash 587213024, now seen corresponding path program 3 times [2021-01-20 17:49:13,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:13,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485260497] [2021-01-20 17:49:13,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:13,692 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 17:49:13,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485260497] [2021-01-20 17:49:13,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:13,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 17:49:13,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332225925] [2021-01-20 17:49:13,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 17:49:13,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:13,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 17:49:13,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-20 17:49:13,694 INFO L87 Difference]: Start difference. First operand 18506 states and 53802 transitions. 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 17:49:14,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:14,085 INFO L93 Difference]: Finished difference Result 22538 states and 65578 transitions. [2021-01-20 17:49:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 17:49:14,086 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 17:49:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:14,087 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:14,087 INFO L78 Accepts]: Start accepts. Automaton has 22538 states and 65578 transitions. Word has length 38 [2021-01-20 17:49:14,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:14,087 INFO L481 AbstractCegarLoop]: Abstraction has 22538 states and 65578 transitions. [2021-01-20 17:49:14,087 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 17:49:14,088 INFO L276 IsEmpty]: Start isEmpty. Operand 22538 states and 65578 transitions. [2021-01-20 17:49:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:14,109 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:14,110 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 17:49:14,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-20 17:49:14,110 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:14,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:14,111 INFO L82 PathProgramCache]: Analyzing trace with hash 810819243, now seen corresponding path program 1 times [2021-01-20 17:49:14,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:14,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009241555] [2021-01-20 17:49:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:14,400 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 17:49:14,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009241555] [2021-01-20 17:49:14,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404383202] [2021-01-20 17:49:14,401 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 17:49:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:14,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:14,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:14,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:14,687 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 17:49:14,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:14,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:14,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474562084] [2021-01-20 17:49:14,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:14,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:14,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:14,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:14,690 INFO L87 Difference]: Start difference. First operand 22538 states and 65578 transitions. 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 17:49:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:15,232 INFO L93 Difference]: Finished difference Result 23434 states and 68202 transitions. [2021-01-20 17:49:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 17:49:15,233 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 17:49:15,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:15,233 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-01-20 17:49:15,233 INFO L78 Accepts]: Start accepts. Automaton has 23434 states and 68202 transitions. Word has length 43 [2021-01-20 17:49:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:15,234 INFO L481 AbstractCegarLoop]: Abstraction has 23434 states and 68202 transitions. [2021-01-20 17:49:15,234 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 17:49:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 23434 states and 68202 transitions. [2021-01-20 17:49:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:15,260 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:15,260 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 17:49:15,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:15,474 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:15,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:15,475 INFO L82 PathProgramCache]: Analyzing trace with hash -193147267, now seen corresponding path program 2 times [2021-01-20 17:49:15,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:15,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775682573] [2021-01-20 17:49:15,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:15,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775682573] [2021-01-20 17:49:15,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181960368] [2021-01-20 17:49:15,718 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 17:49:15,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:15,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:15,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:15,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:15,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:15,885 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 17:49:15,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:15,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-01-20 17:49:15,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705766180] [2021-01-20 17:49:15,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 17:49:15,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 17:49:15,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-01-20 17:49:15,887 INFO L87 Difference]: Start difference. First operand 23434 states and 68202 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 17:49:16,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:16,704 INFO L93 Difference]: Finished difference Result 29578 states and 86122 transitions. [2021-01-20 17:49:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 17:49:16,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 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 17:49:16,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:16,706 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-01-20 17:49:16,706 INFO L78 Accepts]: Start accepts. Automaton has 29578 states and 86122 transitions. Word has length 43 [2021-01-20 17:49:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:16,706 INFO L481 AbstractCegarLoop]: Abstraction has 29578 states and 86122 transitions. [2021-01-20 17:49:16,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 17:49:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 29578 states and 86122 transitions. [2021-01-20 17:49:16,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:16,726 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:16,726 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 17:49:16,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-20 17:49:16,940 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:16,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2089322251, now seen corresponding path program 1 times [2021-01-20 17:49:16,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:16,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851068214] [2021-01-20 17:49:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:17,092 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 17:49:17,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851068214] [2021-01-20 17:49:17,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697091864] [2021-01-20 17:49:17,093 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 17:49:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:17,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:17,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:17,287 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 17:49:17,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:17,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:17,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034433297] [2021-01-20 17:49:17,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:17,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:17,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:17,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:17,290 INFO L87 Difference]: Start difference. First operand 29578 states and 86122 transitions. 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 17:49:18,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:18,060 INFO L93 Difference]: Finished difference Result 35530 states and 103466 transitions. [2021-01-20 17:49:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 17:49:18,061 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 17:49:18,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:18,061 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2021-01-20 17:49:18,061 INFO L78 Accepts]: Start accepts. Automaton has 35530 states and 103466 transitions. Word has length 43 [2021-01-20 17:49:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:18,062 INFO L481 AbstractCegarLoop]: Abstraction has 35530 states and 103466 transitions. [2021-01-20 17:49:18,062 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 17:49:18,062 INFO L276 IsEmpty]: Start isEmpty. Operand 35530 states and 103466 transitions. [2021-01-20 17:49:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:18,179 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:18,180 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 17:49:18,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:18,387 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:18,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:18,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1853174015, now seen corresponding path program 2 times [2021-01-20 17:49:18,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:18,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964973573] [2021-01-20 17:49:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:18,561 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 17:49:18,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964973573] [2021-01-20 17:49:18,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007833514] [2021-01-20 17:49:18,562 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 17:49:18,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:18,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:18,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:18,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:18,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:18,823 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 17:49:18,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:18,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:18,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115399913] [2021-01-20 17:49:18,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:18,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:18,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:18,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:18,831 INFO L87 Difference]: Start difference. First operand 35530 states and 103466 transitions. 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 17:49:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:19,703 INFO L93 Difference]: Finished difference Result 38026 states and 110762 transitions. [2021-01-20 17:49:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 17:49:19,704 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 17:49:19,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:19,705 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 17:49:19,705 INFO L78 Accepts]: Start accepts. Automaton has 38026 states and 110762 transitions. Word has length 43 [2021-01-20 17:49:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:19,705 INFO L481 AbstractCegarLoop]: Abstraction has 38026 states and 110762 transitions. [2021-01-20 17:49:19,706 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 17:49:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 38026 states and 110762 transitions. [2021-01-20 17:49:19,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:19,726 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:19,727 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 17:49:19,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-20 17:49:19,932 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:19,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:19,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2013675815, now seen corresponding path program 3 times [2021-01-20 17:49:19,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:19,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854135526] [2021-01-20 17:49:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:20,123 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 17:49:20,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854135526] [2021-01-20 17:49:20,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792163596] [2021-01-20 17:49:20,124 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 17:49:20,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 17:49:20,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:20,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:20,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:20,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:20,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:20,418 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 17:49:20,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:20,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:20,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260835202] [2021-01-20 17:49:20,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:20,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:20,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:20,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:20,420 INFO L87 Difference]: Start difference. First operand 38026 states and 110762 transitions. 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 17:49:21,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:21,603 INFO L93 Difference]: Finished difference Result 50698 states and 147818 transitions. [2021-01-20 17:49:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 17:49:21,608 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 17:49:21,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:21,609 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=460, Invalid=1346, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 17:49:21,609 INFO L78 Accepts]: Start accepts. Automaton has 50698 states and 147818 transitions. Word has length 43 [2021-01-20 17:49:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:21,609 INFO L481 AbstractCegarLoop]: Abstraction has 50698 states and 147818 transitions. [2021-01-20 17:49:21,610 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 17:49:21,610 INFO L276 IsEmpty]: Start isEmpty. Operand 50698 states and 147818 transitions. [2021-01-20 17:49:21,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:21,641 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:21,641 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 17:49:21,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:21,856 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:21,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:21,857 INFO L82 PathProgramCache]: Analyzing trace with hash 264667651, now seen corresponding path program 2 times [2021-01-20 17:49:21,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:21,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238767212] [2021-01-20 17:49:21,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:22,114 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 7 [2021-01-20 17:49:22,156 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 17:49:22,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238767212] [2021-01-20 17:49:22,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618480593] [2021-01-20 17:49:22,157 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 17:49:22,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:22,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:22,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:22,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:22,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:22,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:22,435 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 17:49:22,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:22,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 17:49:22,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176316835] [2021-01-20 17:49:22,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:49:22,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:22,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:49:22,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-20 17:49:22,438 INFO L87 Difference]: Start difference. First operand 50698 states and 147818 transitions. 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 17:49:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:23,173 INFO L93 Difference]: Finished difference Result 58106 states and 169290 transitions. [2021-01-20 17:49:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 17:49:23,174 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 17:49:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:23,175 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-01-20 17:49:23,175 INFO L78 Accepts]: Start accepts. Automaton has 58106 states and 169290 transitions. Word has length 48 [2021-01-20 17:49:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:23,175 INFO L481 AbstractCegarLoop]: Abstraction has 58106 states and 169290 transitions. [2021-01-20 17:49:23,176 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 17:49:23,176 INFO L276 IsEmpty]: Start isEmpty. Operand 58106 states and 169290 transitions. [2021-01-20 17:49:23,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:23,204 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:23,205 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 17:49:23,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-20 17:49:23,406 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:23,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:23,407 INFO L82 PathProgramCache]: Analyzing trace with hash -183544624, now seen corresponding path program 3 times [2021-01-20 17:49:23,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:23,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180398416] [2021-01-20 17:49:23,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:23,571 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 17:49:23,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180398416] [2021-01-20 17:49:23,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018851454] [2021-01-20 17:49:23,572 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 17:49:23,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:49:23,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:23,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:49:23,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:23,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:23,900 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 17:49:23,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:23,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-20 17:49:23,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049845877] [2021-01-20 17:49:23,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 17:49:23,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:23,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 17:49:23,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-01-20 17:49:23,902 INFO L87 Difference]: Start difference. First operand 58106 states and 169290 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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 17:49:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:24,508 INFO L93 Difference]: Finished difference Result 59066 states and 172106 transitions. [2021-01-20 17:49:24,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 17:49:24,509 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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 48 [2021-01-20 17:49:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:24,510 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-01-20 17:49:24,510 INFO L78 Accepts]: Start accepts. Automaton has 59066 states and 172106 transitions. Word has length 48 [2021-01-20 17:49:24,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:24,510 INFO L481 AbstractCegarLoop]: Abstraction has 59066 states and 172106 transitions. [2021-01-20 17:49:24,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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 17:49:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 59066 states and 172106 transitions. [2021-01-20 17:49:24,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:24,537 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:24,537 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 17:49:24,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-20 17:49:24,748 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:24,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:24,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1187511134, now seen corresponding path program 4 times [2021-01-20 17:49:24,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:24,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456606519] [2021-01-20 17:49:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:24,887 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 17:49:24,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456606519] [2021-01-20 17:49:24,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463624914] [2021-01-20 17:49:24,888 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 17:49:24,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:49:24,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:24,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:24,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:25,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:25,286 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2021-01-20 17:49:25,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:25,333 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 17:49:25,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:25,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:25,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780725450] [2021-01-20 17:49:25,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:25,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:25,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:25,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:25,336 INFO L87 Difference]: Start difference. First operand 59066 states and 172106 transitions. 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 17:49:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:26,598 INFO L93 Difference]: Finished difference Result 65914 states and 192074 transitions. [2021-01-20 17:49:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 17:49:26,599 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 17:49:26,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:26,600 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 17:49:26,600 INFO L78 Accepts]: Start accepts. Automaton has 65914 states and 192074 transitions. Word has length 48 [2021-01-20 17:49:26,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:26,600 INFO L481 AbstractCegarLoop]: Abstraction has 65914 states and 192074 transitions. [2021-01-20 17:49:26,600 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 17:49:26,600 INFO L276 IsEmpty]: Start isEmpty. Operand 65914 states and 192074 transitions. [2021-01-20 17:49:26,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:26,631 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:26,631 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 17:49:26,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-20 17:49:26,842 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:26,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:26,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1211281178, now seen corresponding path program 1 times [2021-01-20 17:49:26,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:26,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175982269] [2021-01-20 17:49:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:26,983 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 17:49:26,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175982269] [2021-01-20 17:49:26,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375171028] [2021-01-20 17:49:26,985 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 17:49:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:27,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:27,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:27,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:27,224 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 17:49:27,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:27,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:27,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540943361] [2021-01-20 17:49:27,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:27,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:27,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:27,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:27,227 INFO L87 Difference]: Start difference. First operand 65914 states and 192074 transitions. 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 17:49:27,416 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 9 [2021-01-20 17:49:28,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:28,467 INFO L93 Difference]: Finished difference Result 68922 states and 200842 transitions. [2021-01-20 17:49:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 17:49:28,468 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 17:49:28,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:28,469 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 17:49:28,469 INFO L78 Accepts]: Start accepts. Automaton has 68922 states and 200842 transitions. Word has length 48 [2021-01-20 17:49:28,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:28,469 INFO L481 AbstractCegarLoop]: Abstraction has 68922 states and 200842 transitions. [2021-01-20 17:49:28,469 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 17:49:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 68922 states and 200842 transitions. [2021-01-20 17:49:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:28,497 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:28,497 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 17:49:28,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-20 17:49:28,713 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:28,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1447429414, now seen corresponding path program 2 times [2021-01-20 17:49:28,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:28,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906254205] [2021-01-20 17:49:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:28,843 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 17:49:28,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906254205] [2021-01-20 17:49:28,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141379985] [2021-01-20 17:49:28,845 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 17:49:28,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:28,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:28,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:28,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:29,127 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:29,140 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 17:49:29,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:29,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:29,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281004604] [2021-01-20 17:49:29,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:29,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:29,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:29,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:29,142 INFO L87 Difference]: Start difference. First operand 68922 states and 200842 transitions. 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 17:49:29,468 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2021-01-20 17:49:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:30,371 INFO L93 Difference]: Finished difference Result 70394 states and 205130 transitions. [2021-01-20 17:49:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 17:49:30,372 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 17:49:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:30,373 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 17:49:30,373 INFO L78 Accepts]: Start accepts. Automaton has 70394 states and 205130 transitions. Word has length 48 [2021-01-20 17:49:30,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:30,374 INFO L481 AbstractCegarLoop]: Abstraction has 70394 states and 205130 transitions. [2021-01-20 17:49:30,374 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 17:49:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 70394 states and 205130 transitions. [2021-01-20 17:49:30,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:30,404 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:30,405 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 17:49:30,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-20 17:49:30,615 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:30,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:30,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1019311948, now seen corresponding path program 3 times [2021-01-20 17:49:30,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:30,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690100010] [2021-01-20 17:49:30,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:30,798 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 17:49:30,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690100010] [2021-01-20 17:49:30,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690222481] [2021-01-20 17:49:30,798 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 17:49:30,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 17:49:30,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:30,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:30,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:31,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:31,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:31,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:31,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:31,421 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 17:49:31,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:31,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 17:49:31,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021833251] [2021-01-20 17:49:31,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:49:31,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:31,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:49:31,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-01-20 17:49:31,423 INFO L87 Difference]: Start difference. First operand 70394 states and 205130 transitions. 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 17:49:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:33,604 INFO L93 Difference]: Finished difference Result 94074 states and 274378 transitions. [2021-01-20 17:49:33,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-20 17:49:33,605 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 17:49:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:33,606 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=757, Invalid=2549, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 17:49:33,606 INFO L78 Accepts]: Start accepts. Automaton has 94074 states and 274378 transitions. Word has length 48 [2021-01-20 17:49:33,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:33,606 INFO L481 AbstractCegarLoop]: Abstraction has 94074 states and 274378 transitions. [2021-01-20 17:49:33,607 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 17:49:33,607 INFO L276 IsEmpty]: Start isEmpty. Operand 94074 states and 274378 transitions. [2021-01-20 17:49:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:33,632 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:33,632 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 17:49:33,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:33,841 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:33,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:33,842 INFO L82 PathProgramCache]: Analyzing trace with hash 310617624, now seen corresponding path program 4 times [2021-01-20 17:49:33,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:33,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179413093] [2021-01-20 17:49:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:33,980 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 17:49:33,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179413093] [2021-01-20 17:49:33,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552315448] [2021-01-20 17:49:33,980 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 17:49:34,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:49:34,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:34,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:34,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:34,192 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 17:49:34,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:34,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:34,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193425197] [2021-01-20 17:49:34,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:34,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:34,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:34,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:34,194 INFO L87 Difference]: Start difference. First operand 94074 states and 274378 transitions. 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 17:49:35,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:35,511 INFO L93 Difference]: Finished difference Result 102202 states and 298058 transitions. [2021-01-20 17:49:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 17:49:35,511 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 17:49:35,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:35,512 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=355, Invalid=1051, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 17:49:35,512 INFO L78 Accepts]: Start accepts. Automaton has 102202 states and 298058 transitions. Word has length 48 [2021-01-20 17:49:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:35,512 INFO L481 AbstractCegarLoop]: Abstraction has 102202 states and 298058 transitions. [2021-01-20 17:49:35,512 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 17:49:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 102202 states and 298058 transitions. [2021-01-20 17:49:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:35,538 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:35,538 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 17:49:35,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-20 17:49:35,739 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:35,740 INFO L82 PathProgramCache]: Analyzing trace with hash -958721652, now seen corresponding path program 5 times [2021-01-20 17:49:35,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:35,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498684278] [2021-01-20 17:49:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:36,193 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-01-20 17:49:36,239 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 17:49:36,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498684278] [2021-01-20 17:49:36,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123815714] [2021-01-20 17:49:36,240 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 17:49:36,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:36,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:36,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:36,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:36,454 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:36,465 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 17:49:36,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:36,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:36,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046724370] [2021-01-20 17:49:36,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:36,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:36,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:36,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:36,467 INFO L87 Difference]: Start difference. First operand 102202 states and 298058 transitions. 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 17:49:38,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:38,418 INFO L93 Difference]: Finished difference Result 110138 states and 321162 transitions. [2021-01-20 17:49:38,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 17:49:38,419 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 17:49:38,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:38,420 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=509, Invalid=1653, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 17:49:38,420 INFO L78 Accepts]: Start accepts. Automaton has 110138 states and 321162 transitions. Word has length 48 [2021-01-20 17:49:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:38,421 INFO L481 AbstractCegarLoop]: Abstraction has 110138 states and 321162 transitions. [2021-01-20 17:49:38,421 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 17:49:38,421 INFO L276 IsEmpty]: Start isEmpty. Operand 110138 states and 321162 transitions. [2021-01-20 17:49:38,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:38,449 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:38,449 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 17:49:38,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:38,650 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:38,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:38,651 INFO L82 PathProgramCache]: Analyzing trace with hash 763359212, now seen corresponding path program 6 times [2021-01-20 17:49:38,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:38,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559575399] [2021-01-20 17:49:38,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:38,780 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 17:49:38,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559575399] [2021-01-20 17:49:38,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929329750] [2021-01-20 17:49:38,781 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 17:49:38,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-20 17:49:38,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:38,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:38,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:38,994 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:39,001 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 17:49:39,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:39,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:39,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788698776] [2021-01-20 17:49:39,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:39,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:39,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:39,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:39,003 INFO L87 Difference]: Start difference. First operand 110138 states and 321162 transitions. 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 17:49:40,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:40,716 INFO L93 Difference]: Finished difference Result 115450 states and 336650 transitions. [2021-01-20 17:49:40,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 17:49:40,716 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 17:49:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:40,717 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=468, Invalid=1424, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 17:49:40,717 INFO L78 Accepts]: Start accepts. Automaton has 115450 states and 336650 transitions. Word has length 48 [2021-01-20 17:49:40,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:40,718 INFO L481 AbstractCegarLoop]: Abstraction has 115450 states and 336650 transitions. [2021-01-20 17:49:40,718 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 17:49:40,718 INFO L276 IsEmpty]: Start isEmpty. Operand 115450 states and 336650 transitions. [2021-01-20 17:49:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:40,742 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:40,742 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 17:49:40,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-20 17:49:40,944 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1519359984, now seen corresponding path program 7 times [2021-01-20 17:49:40,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:40,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820845830] [2021-01-20 17:49:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:41,122 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 17:49:41,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820845830] [2021-01-20 17:49:41,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077802943] [2021-01-20 17:49:41,123 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 17:49:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:41,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:41,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:41,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:41,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:41,353 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 17:49:41,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:41,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 17:49:41,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440922555] [2021-01-20 17:49:41,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:49:41,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:41,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:49:41,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-01-20 17:49:41,355 INFO L87 Difference]: Start difference. First operand 115450 states and 336650 transitions. 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 17:49:42,796 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2021-01-20 17:49:44,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:44,317 INFO L93 Difference]: Finished difference Result 146426 states and 427210 transitions. [2021-01-20 17:49:44,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-20 17:49:44,324 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 17:49:44,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:44,326 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1048, Invalid=3374, Unknown=0, NotChecked=0, Total=4422 [2021-01-20 17:49:44,327 INFO L78 Accepts]: Start accepts. Automaton has 146426 states and 427210 transitions. Word has length 48 [2021-01-20 17:49:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:44,327 INFO L481 AbstractCegarLoop]: Abstraction has 146426 states and 427210 transitions. [2021-01-20 17:49:44,327 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 17:49:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 146426 states and 427210 transitions. [2021-01-20 17:49:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:44,443 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:44,443 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 17:49:44,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:44,644 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:44,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:44,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1376333259, now seen corresponding path program 5 times [2021-01-20 17:49:44,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:44,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487765305] [2021-01-20 17:49:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:44,823 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 17:49:44,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487765305] [2021-01-20 17:49:44,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669358576] [2021-01-20 17:49:44,826 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 17:49:44,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 17:49:44,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:44,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:44,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:45,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:45,108 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 17:49:45,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:45,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:49:45,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189630766] [2021-01-20 17:49:45,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:49:45,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:45,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:49:45,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:49:45,111 INFO L87 Difference]: Start difference. First operand 146426 states and 427210 transitions. 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 17:49:46,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:46,819 INFO L93 Difference]: Finished difference Result 147450 states and 430218 transitions. [2021-01-20 17:49:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 17:49:46,820 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 17:49:46,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:46,821 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-01-20 17:49:46,822 INFO L78 Accepts]: Start accepts. Automaton has 147450 states and 430218 transitions. Word has length 53 [2021-01-20 17:49:46,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:46,822 INFO L481 AbstractCegarLoop]: Abstraction has 147450 states and 430218 transitions. [2021-01-20 17:49:46,822 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 17:49:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 147450 states and 430218 transitions. [2021-01-20 17:49:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:46,899 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:46,899 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 17:49:47,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-20 17:49:47,113 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:47,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:47,113 INFO L82 PathProgramCache]: Analyzing trace with hash 372366749, now seen corresponding path program 6 times [2021-01-20 17:49:47,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:47,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796773339] [2021-01-20 17:49:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:47,280 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 17:49:47,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796773339] [2021-01-20 17:49:47,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369480532] [2021-01-20 17:49:47,281 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 17:49:47,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 17:49:47,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:47,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 17:49:47,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:47,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:47,444 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 17:49:47,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:47,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-01-20 17:49:47,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074922031] [2021-01-20 17:49:47,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:47,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:47,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:47,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:47,447 INFO L87 Difference]: Start difference. First operand 147450 states and 430218 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:49,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:49,046 INFO L93 Difference]: Finished difference Result 151610 states and 442378 transitions. [2021-01-20 17:49:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 17:49:49,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:49:49,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:49,047 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=294, Invalid=966, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 17:49:49,047 INFO L78 Accepts]: Start accepts. Automaton has 151610 states and 442378 transitions. Word has length 53 [2021-01-20 17:49:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:49,048 INFO L481 AbstractCegarLoop]: Abstraction has 151610 states and 442378 transitions. [2021-01-20 17:49:49,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 151610 states and 442378 transitions. [2021-01-20 17:49:49,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:49,102 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:49,102 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 17:49:49,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-20 17:49:49,311 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:49,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:49,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1523808235, now seen corresponding path program 8 times [2021-01-20 17:49:49,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:49,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383440290] [2021-01-20 17:49:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:49,488 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 17:49:49,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383440290] [2021-01-20 17:49:49,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859513605] [2021-01-20 17:49:49,489 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 17:49:49,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:49,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:49,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:49,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:49,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:49,757 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 17:49:49,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:49,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:49:49,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171968695] [2021-01-20 17:49:49,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:49:49,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:49,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:49:49,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:49:49,759 INFO L87 Difference]: Start difference. First operand 151610 states and 442378 transitions. 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 17:49:51,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:51,566 INFO L93 Difference]: Finished difference Result 154746 states and 451530 transitions. [2021-01-20 17:49:51,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 17:49:51,567 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 17:49:51,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:51,568 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 17:49:51,568 INFO L78 Accepts]: Start accepts. Automaton has 154746 states and 451530 transitions. Word has length 53 [2021-01-20 17:49:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:51,569 INFO L481 AbstractCegarLoop]: Abstraction has 154746 states and 451530 transitions. [2021-01-20 17:49:51,569 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 17:49:51,569 INFO L276 IsEmpty]: Start isEmpty. Operand 154746 states and 451530 transitions. [2021-01-20 17:49:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:51,632 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:51,632 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 17:49:51,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-20 17:49:51,838 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:51,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:51,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1287659999, now seen corresponding path program 9 times [2021-01-20 17:49:51,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:51,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733563116] [2021-01-20 17:49:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:52,002 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 17:49:52,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733563116] [2021-01-20 17:49:52,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077604903] [2021-01-20 17:49:52,003 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 17:49:52,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:49:52,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:52,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 17:49:52,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:52,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:52,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:52,230 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 17:49:52,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:52,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-20 17:49:52,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809935764] [2021-01-20 17:49:52,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:52,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:52,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:52,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:52,232 INFO L87 Difference]: Start difference. First operand 154746 states and 451530 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 17:49:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:54,329 INFO L93 Difference]: Finished difference Result 162874 states and 475210 transitions. [2021-01-20 17:49:54,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-20 17:49:54,330 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 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 17:49:54,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:54,331 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=397, Invalid=1409, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 17:49:54,331 INFO L78 Accepts]: Start accepts. Automaton has 162874 states and 475210 transitions. Word has length 53 [2021-01-20 17:49:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:54,332 INFO L481 AbstractCegarLoop]: Abstraction has 162874 states and 475210 transitions. [2021-01-20 17:49:54,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 17:49:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 162874 states and 475210 transitions. [2021-01-20 17:49:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:54,411 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:54,411 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 17:49:54,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-20 17:49:54,612 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:54,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1715777465, now seen corresponding path program 10 times [2021-01-20 17:49:54,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:54,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394789766] [2021-01-20 17:49:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:54,803 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 17:49:54,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394789766] [2021-01-20 17:49:54,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059498202] [2021-01-20 17:49:54,804 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 17:49:54,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:49:54,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:54,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 17:49:54,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:55,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:55,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:55,114 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 17:49:55,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:55,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:49:55,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361983685] [2021-01-20 17:49:55,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:49:55,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:55,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:49:55,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:49:55,116 INFO L87 Difference]: Start difference. First operand 162874 states and 475210 transitions. 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 17:49:57,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:57,683 INFO L93 Difference]: Finished difference Result 175994 states and 513482 transitions. [2021-01-20 17:49:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 17:49:57,684 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 17:49:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:57,685 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=687, Invalid=2283, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 17:49:57,685 INFO L78 Accepts]: Start accepts. Automaton has 175994 states and 513482 transitions. Word has length 53 [2021-01-20 17:49:57,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:57,685 INFO L481 AbstractCegarLoop]: Abstraction has 175994 states and 513482 transitions. [2021-01-20 17:49:57,685 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 17:49:57,686 INFO L276 IsEmpty]: Start isEmpty. Operand 175994 states and 513482 transitions. [2021-01-20 17:49:58,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:58,282 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:58,282 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 17:49:58,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-20 17:49:58,496 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:58,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:58,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1870495507, now seen corresponding path program 11 times [2021-01-20 17:49:58,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:58,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564638531] [2021-01-20 17:49:58,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:58,660 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 17:49:58,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564638531] [2021-01-20 17:49:58,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93852687] [2021-01-20 17:49:58,661 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 17:49:58,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 17:49:58,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:58,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:58,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:58,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:58,950 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 17:49:58,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:58,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:49:58,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048692811] [2021-01-20 17:49:58,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:49:58,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:58,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:49:58,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:49:58,952 INFO L87 Difference]: Start difference. First operand 175994 states and 513482 transitions. 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 17:50:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:01,257 INFO L93 Difference]: Finished difference Result 185658 states and 541642 transitions. [2021-01-20 17:50:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 17:50:01,258 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 17:50:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:01,259 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=491, Invalid=1579, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 17:50:01,259 INFO L78 Accepts]: Start accepts. Automaton has 185658 states and 541642 transitions. Word has length 53 [2021-01-20 17:50:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:01,259 INFO L481 AbstractCegarLoop]: Abstraction has 185658 states and 541642 transitions. [2021-01-20 17:50:01,260 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 17:50:01,260 INFO L276 IsEmpty]: Start isEmpty. Operand 185658 states and 541642 transitions. [2021-01-20 17:50:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:01,312 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:01,313 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 17:50:01,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:01,513 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:01,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:01,514 INFO L82 PathProgramCache]: Analyzing trace with hash 601156231, now seen corresponding path program 12 times [2021-01-20 17:50:01,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:01,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105631997] [2021-01-20 17:50:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:01,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105631997] [2021-01-20 17:50:01,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542734388] [2021-01-20 17:50:01,692 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 17:50:01,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 17:50:01,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:01,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:01,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:01,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:01,984 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 17:50:01,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:01,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:50:01,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605852589] [2021-01-20 17:50:01,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:50:01,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:01,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:50:01,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:50:01,986 INFO L87 Difference]: Start difference. First operand 185658 states and 541642 transitions. 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 17:50:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:04,510 INFO L93 Difference]: Finished difference Result 189114 states and 551690 transitions. [2021-01-20 17:50:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 17:50:04,514 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 17:50:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:04,516 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=588, Invalid=2064, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 17:50:04,516 INFO L78 Accepts]: Start accepts. Automaton has 189114 states and 551690 transitions. Word has length 53 [2021-01-20 17:50:04,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:04,517 INFO L481 AbstractCegarLoop]: Abstraction has 189114 states and 551690 transitions. [2021-01-20 17:50:04,517 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 17:50:04,517 INFO L276 IsEmpty]: Start isEmpty. Operand 189114 states and 551690 transitions. [2021-01-20 17:50:04,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:04,612 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:04,612 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 17:50:04,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:04,819 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:04,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:04,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1971730201, now seen corresponding path program 13 times [2021-01-20 17:50:04,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:04,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104966814] [2021-01-20 17:50:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:04,989 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 17:50:04,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104966814] [2021-01-20 17:50:04,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507505854] [2021-01-20 17:50:04,990 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 17:50:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:05,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:05,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:05,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:05,320 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 17:50:05,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:05,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:50:05,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384373014] [2021-01-20 17:50:05,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:50:05,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:05,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:50:05,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:50:05,322 INFO L87 Difference]: Start difference. First operand 189114 states and 551690 transitions. 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 17:50:08,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:08,039 INFO L93 Difference]: Finished difference Result 195258 states and 569610 transitions. [2021-01-20 17:50:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 17:50:08,040 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 17:50:08,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:08,041 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=618, Invalid=2034, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 17:50:08,041 INFO L78 Accepts]: Start accepts. Automaton has 195258 states and 569610 transitions. Word has length 53 [2021-01-20 17:50:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:08,041 INFO L481 AbstractCegarLoop]: Abstraction has 195258 states and 569610 transitions. [2021-01-20 17:50:08,041 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 17:50:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 195258 states and 569610 transitions. [2021-01-20 17:50:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:08,106 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:08,106 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 17:50:08,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:08,314 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1215729429, now seen corresponding path program 14 times [2021-01-20 17:50:08,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:08,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783595485] [2021-01-20 17:50:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:08,477 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 17:50:08,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783595485] [2021-01-20 17:50:08,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915750256] [2021-01-20 17:50:08,478 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 17:50:08,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:50:08,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:08,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:08,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:08,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:50:08,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:08,864 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 17:50:08,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:08,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:50:08,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724071629] [2021-01-20 17:50:08,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:50:08,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:08,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:50:08,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:50:08,866 INFO L87 Difference]: Start difference. First operand 195258 states and 569610 transitions. 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 17:50:09,560 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2021-01-20 17:50:13,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:13,009 INFO L93 Difference]: Finished difference Result 212922 states and 621066 transitions. [2021-01-20 17:50:13,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-20 17:50:13,010 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 17:50:13,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:13,012 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=965, Invalid=3067, Unknown=0, NotChecked=0, Total=4032 [2021-01-20 17:50:13,012 INFO L78 Accepts]: Start accepts. Automaton has 212922 states and 621066 transitions. Word has length 53 [2021-01-20 17:50:13,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:13,012 INFO L481 AbstractCegarLoop]: Abstraction has 212922 states and 621066 transitions. [2021-01-20 17:50:13,012 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 17:50:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 212922 states and 621066 transitions. [2021-01-20 17:50:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:13,067 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:13,067 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 17:50:13,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-20 17:50:13,268 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:13,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:13,269 INFO L82 PathProgramCache]: Analyzing trace with hash 680245205, now seen corresponding path program 15 times [2021-01-20 17:50:13,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:13,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833410167] [2021-01-20 17:50:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:13,430 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 17:50:13,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833410167] [2021-01-20 17:50:13,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260760031] [2021-01-20 17:50:13,431 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 17:50:13,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:50:13,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:13,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:13,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:13,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:13,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:13,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:50:13,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181993085] [2021-01-20 17:50:13,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:50:13,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:13,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:50:13,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:50:13,693 INFO L87 Difference]: Start difference. First operand 212922 states and 621066 transitions. 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 17:50:16,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:16,195 INFO L93 Difference]: Finished difference Result 218682 states and 637834 transitions. [2021-01-20 17:50:16,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 17:50:16,196 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 17:50:16,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:16,197 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=547, Invalid=1709, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 17:50:16,198 INFO L78 Accepts]: Start accepts. Automaton has 218682 states and 637834 transitions. Word has length 53 [2021-01-20 17:50:16,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:16,198 INFO L481 AbstractCegarLoop]: Abstraction has 218682 states and 637834 transitions. [2021-01-20 17:50:16,198 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 17:50:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 218682 states and 637834 transitions. [2021-01-20 17:50:16,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:16,287 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:16,287 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 17:50:16,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:16,495 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:16,496 INFO L82 PathProgramCache]: Analyzing trace with hash 409323335, now seen corresponding path program 16 times [2021-01-20 17:50:16,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:16,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900925228] [2021-01-20 17:50:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:16,685 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 17:50:16,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900925228] [2021-01-20 17:50:16,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259451119] [2021-01-20 17:50:16,686 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 17:50:16,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:50:16,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:16,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 17:50:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:16,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:16,987 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 17:50:16,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:16,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:50:16,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004173531] [2021-01-20 17:50:16,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:50:16,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:16,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:50:16,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:50:16,988 INFO L87 Difference]: Start difference. First operand 218682 states and 637834 transitions. 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 17:50:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:19,771 INFO L93 Difference]: Finished difference Result 224314 states and 654282 transitions. [2021-01-20 17:50:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 17:50:19,772 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 17:50:19,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:19,773 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=632, Invalid=1918, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 17:50:19,773 INFO L78 Accepts]: Start accepts. Automaton has 224314 states and 654282 transitions. Word has length 53 [2021-01-20 17:50:19,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:19,773 INFO L481 AbstractCegarLoop]: Abstraction has 224314 states and 654282 transitions. [2021-01-20 17:50:19,774 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 17:50:19,774 INFO L276 IsEmpty]: Start isEmpty. Operand 224314 states and 654282 transitions. [2021-01-20 17:50:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:19,846 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:19,846 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 17:50:20,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-20 17:50:20,047 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:20,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:20,048 INFO L82 PathProgramCache]: Analyzing trace with hash -284076831, now seen corresponding path program 17 times [2021-01-20 17:50:20,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:20,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818661704] [2021-01-20 17:50:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:20,216 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 17:50:20,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818661704] [2021-01-20 17:50:20,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144919787] [2021-01-20 17:50:20,216 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 17:50:20,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 17:50:20,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:20,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:20,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:20,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:20,505 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 17:50:20,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:20,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:50:20,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461207724] [2021-01-20 17:50:20,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:50:20,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:20,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:50:20,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:50:20,508 INFO L87 Difference]: Start difference. First operand 224314 states and 654282 transitions. 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 17:50:24,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:24,291 INFO L93 Difference]: Finished difference Result 232122 states and 677002 transitions. [2021-01-20 17:50:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-20 17:50:24,297 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 17:50:24,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:24,300 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=750, Invalid=2672, Unknown=0, NotChecked=0, Total=3422 [2021-01-20 17:50:24,301 INFO L78 Accepts]: Start accepts. Automaton has 232122 states and 677002 transitions. Word has length 53 [2021-01-20 17:50:24,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:24,301 INFO L481 AbstractCegarLoop]: Abstraction has 232122 states and 677002 transitions. [2021-01-20 17:50:24,301 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 17:50:24,301 INFO L276 IsEmpty]: Start isEmpty. Operand 232122 states and 677002 transitions. [2021-01-20 17:50:24,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:24,409 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:24,409 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 17:50:24,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:24,611 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:24,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:24,612 INFO L82 PathProgramCache]: Analyzing trace with hash -554998701, now seen corresponding path program 18 times [2021-01-20 17:50:24,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:24,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257651478] [2021-01-20 17:50:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:24,785 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 17:50:24,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257651478] [2021-01-20 17:50:24,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375865891] [2021-01-20 17:50:24,786 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 17:50:24,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 17:50:24,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:24,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:24,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:25,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:25,095 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 17:50:25,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:25,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:50:25,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156759708] [2021-01-20 17:50:25,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:50:25,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:25,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:50:25,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:50:25,097 INFO L87 Difference]: Start difference. First operand 232122 states and 677002 transitions. 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 17:50:28,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:28,362 INFO L93 Difference]: Finished difference Result 236666 states and 690314 transitions. [2021-01-20 17:50:28,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-20 17:50:28,363 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 17:50:28,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:28,363 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=891, Invalid=3015, Unknown=0, NotChecked=0, Total=3906 [2021-01-20 17:50:28,363 INFO L78 Accepts]: Start accepts. Automaton has 236666 states and 690314 transitions. Word has length 53 [2021-01-20 17:50:28,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:28,364 INFO L481 AbstractCegarLoop]: Abstraction has 236666 states and 690314 transitions. [2021-01-20 17:50:28,364 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 17:50:28,364 INFO L276 IsEmpty]: Start isEmpty. Operand 236666 states and 690314 transitions. [2021-01-20 17:50:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:28,447 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:28,447 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 17:50:28,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-20 17:50:28,648 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:28,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:28,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2036829567, now seen corresponding path program 19 times [2021-01-20 17:50:28,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:28,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214254928] [2021-01-20 17:50:28,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:28,828 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 17:50:28,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214254928] [2021-01-20 17:50:28,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95042529] [2021-01-20 17:50:28,828 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 17:50:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:28,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:28,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:29,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:29,142 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 17:50:29,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:29,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:50:29,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884625037] [2021-01-20 17:50:29,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:50:29,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:29,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:50:29,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:50:29,144 INFO L87 Difference]: Start difference. First operand 236666 states and 690314 transitions. 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 17:50:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:32,315 INFO L93 Difference]: Finished difference Result 239546 states and 698698 transitions. [2021-01-20 17:50:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-20 17:50:32,315 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 17:50:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:32,316 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=876, Invalid=2906, Unknown=0, NotChecked=0, Total=3782 [2021-01-20 17:50:32,316 INFO L78 Accepts]: Start accepts. Automaton has 239546 states and 698698 transitions. Word has length 53 [2021-01-20 17:50:32,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:32,316 INFO L481 AbstractCegarLoop]: Abstraction has 239546 states and 698698 transitions. [2021-01-20 17:50:32,317 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 17:50:32,317 INFO L276 IsEmpty]: Start isEmpty. Operand 239546 states and 698698 transitions. [2021-01-20 17:50:32,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:32,386 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:32,386 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 17:50:32,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:32,587 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:32,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:32,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1606714029, now seen corresponding path program 20 times [2021-01-20 17:50:32,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:32,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764144055] [2021-01-20 17:50:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:32,748 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 17:50:32,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764144055] [2021-01-20 17:50:32,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922460579] [2021-01-20 17:50:32,749 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 17:50:32,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:50:32,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:32,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:32,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:33,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:33,024 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 17:50:33,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:33,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:50:33,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349991034] [2021-01-20 17:50:33,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:50:33,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:33,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:50:33,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:50:33,026 INFO L87 Difference]: Start difference. First operand 239546 states and 698698 transitions. 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 17:50:33,872 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2021-01-20 17:50:36,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:36,674 INFO L93 Difference]: Finished difference Result 244154 states and 712138 transitions. [2021-01-20 17:50:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-20 17:50:36,680 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 17:50:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:36,680 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=718, Invalid=2252, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 17:50:36,680 INFO L78 Accepts]: Start accepts. Automaton has 244154 states and 712138 transitions. Word has length 53 [2021-01-20 17:50:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:36,681 INFO L481 AbstractCegarLoop]: Abstraction has 244154 states and 712138 transitions. [2021-01-20 17:50:36,681 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 17:50:36,681 INFO L276 IsEmpty]: Start isEmpty. Operand 244154 states and 712138 transitions. [2021-01-20 17:50:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:36,803 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:36,803 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 17:50:37,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-20 17:50:37,011 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:37,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:37,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1932252495, now seen corresponding path program 21 times [2021-01-20 17:50:37,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:37,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644726308] [2021-01-20 17:50:37,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:37,177 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 17:50:37,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644726308] [2021-01-20 17:50:37,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198685788] [2021-01-20 17:50:37,177 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 17:50:37,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:50:37,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:37,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:37,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:37,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:50:37,468 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:37,477 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 17:50:37,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:37,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:50:37,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711515214] [2021-01-20 17:50:37,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:50:37,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:37,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:50:37,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:50:37,479 INFO L87 Difference]: Start difference. First operand 244154 states and 712138 transitions. 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 17:50:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:41,354 INFO L93 Difference]: Finished difference Result 279098 states and 814154 transitions. [2021-01-20 17:50:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-20 17:50:41,354 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 17:50:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:41,355 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1146, Invalid=3684, Unknown=0, NotChecked=0, Total=4830 [2021-01-20 17:50:41,355 INFO L78 Accepts]: Start accepts. Automaton has 279098 states and 814154 transitions. Word has length 53 [2021-01-20 17:50:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:41,356 INFO L481 AbstractCegarLoop]: Abstraction has 279098 states and 814154 transitions. [2021-01-20 17:50:41,356 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 17:50:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 279098 states and 814154 transitions. [2021-01-20 17:50:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:41,433 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:41,434 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 17:50:41,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-20 17:50:41,635 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:41,636 INFO L82 PathProgramCache]: Analyzing trace with hash 75989787, now seen corresponding path program 22 times [2021-01-20 17:50:41,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:41,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030048366] [2021-01-20 17:50:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:41,832 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 17:50:41,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030048366] [2021-01-20 17:50:41,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340757001] [2021-01-20 17:50:41,833 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 17:50:41,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:50:41,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:41,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 17:50:41,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:42,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:42,142 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 17:50:42,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:42,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:50:42,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38083676] [2021-01-20 17:50:42,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:50:42,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:42,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:50:42,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:50:42,144 INFO L87 Difference]: Start difference. First operand 279098 states and 814154 transitions. 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 17:50:43,991 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-01-20 17:50:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:46,687 INFO L93 Difference]: Finished difference Result 286202 states and 834826 transitions. [2021-01-20 17:50:46,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-20 17:50:46,688 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 17:50:46,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:46,689 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1138, Invalid=3832, Unknown=0, NotChecked=0, Total=4970 [2021-01-20 17:50:46,689 INFO L78 Accepts]: Start accepts. Automaton has 286202 states and 834826 transitions. Word has length 53 [2021-01-20 17:50:46,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:46,689 INFO L481 AbstractCegarLoop]: Abstraction has 286202 states and 834826 transitions. [2021-01-20 17:50:46,690 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 17:50:46,690 INFO L276 IsEmpty]: Start isEmpty. Operand 286202 states and 834826 transitions. [2021-01-20 17:50:46,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:46,836 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:46,836 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 17:50:47,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-20 17:50:47,050 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:47,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:47,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1798070651, now seen corresponding path program 23 times [2021-01-20 17:50:47,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:47,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851066585] [2021-01-20 17:50:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:47,204 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 17:50:47,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851066585] [2021-01-20 17:50:47,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398154388] [2021-01-20 17:50:47,204 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 17:50:47,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 17:50:47,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:47,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:47,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:47,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:47,497 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 17:50:47,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:47,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:50:47,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329967305] [2021-01-20 17:50:47,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:50:47,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:47,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:50:47,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:50:47,499 INFO L87 Difference]: Start difference. First operand 286202 states and 834826 transitions. 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 17:50:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:51,093 INFO L93 Difference]: Finished difference Result 301178 states and 878410 transitions. [2021-01-20 17:50:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-20 17:50:51,094 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 17:50:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:51,095 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=910, Invalid=2872, Unknown=0, NotChecked=0, Total=3782 [2021-01-20 17:50:51,095 INFO L78 Accepts]: Start accepts. Automaton has 301178 states and 878410 transitions. Word has length 53 [2021-01-20 17:50:51,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:51,095 INFO L481 AbstractCegarLoop]: Abstraction has 301178 states and 878410 transitions. [2021-01-20 17:50:51,095 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 17:50:51,095 INFO L276 IsEmpty]: Start isEmpty. Operand 301178 states and 878410 transitions. [2021-01-20 17:50:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:51,157 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:51,158 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 17:50:51,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-20 17:50:51,366 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:51,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1740895873, now seen corresponding path program 24 times [2021-01-20 17:50:51,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:51,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207233686] [2021-01-20 17:50:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:51,537 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 17:50:51,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207233686] [2021-01-20 17:50:51,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045775464] [2021-01-20 17:50:51,538 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 17:50:51,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 17:50:51,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:51,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:51,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:51,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:50:51,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:51,885 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 17:50:51,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:51,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:50:51,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359670820] [2021-01-20 17:50:51,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:50:51,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:51,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:50:51,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:50:51,886 INFO L87 Difference]: Start difference. First operand 301178 states and 878410 transitions. 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 17:50:53,742 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2021-01-20 17:50:57,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:57,535 INFO L93 Difference]: Finished difference Result 343994 states and 1003594 transitions. [2021-01-20 17:50:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-20 17:50:57,536 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 17:50:57,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:57,537 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2035 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1360, Invalid=4190, Unknown=0, NotChecked=0, Total=5550 [2021-01-20 17:50:57,537 INFO L78 Accepts]: Start accepts. Automaton has 343994 states and 1003594 transitions. Word has length 53 [2021-01-20 17:50:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:57,537 INFO L481 AbstractCegarLoop]: Abstraction has 343994 states and 1003594 transitions. [2021-01-20 17:50:57,537 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 17:50:57,537 INFO L276 IsEmpty]: Start isEmpty. Operand 343994 states and 1003594 transitions. [2021-01-20 17:50:57,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:57,605 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:57,605 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 17:50:57,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:57,821 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:57,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:57,821 INFO L82 PathProgramCache]: Analyzing trace with hash 499168331, now seen corresponding path program 25 times [2021-01-20 17:50:57,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:57,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497002776] [2021-01-20 17:50:57,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:57,993 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 17:50:57,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497002776] [2021-01-20 17:50:57,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243585942] [2021-01-20 17:50:57,993 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 17:50:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:58,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:58,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:58,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:58,263 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 17:50:58,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:58,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:50:58,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961584169] [2021-01-20 17:50:58,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:50:58,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:58,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:50:58,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:50:58,265 INFO L87 Difference]: Start difference. First operand 343994 states and 1003594 transitions. 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 17:51:00,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:00,926 INFO L93 Difference]: Finished difference Result 363450 states and 1060362 transitions. [2021-01-20 17:51:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 17:51:00,927 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 17:51:00,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:00,927 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 17:51:00,928 INFO L78 Accepts]: Start accepts. Automaton has 363450 states and 1060362 transitions. Word has length 53 [2021-01-20 17:51:00,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:00,928 INFO L481 AbstractCegarLoop]: Abstraction has 363450 states and 1060362 transitions. [2021-01-20 17:51:00,928 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 17:51:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 363450 states and 1060362 transitions. [2021-01-20 17:51:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:01,004 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:01,007 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 17:51:01,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-20 17:51:01,222 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:01,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:01,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1299793979, now seen corresponding path program 26 times [2021-01-20 17:51:01,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:01,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297951665] [2021-01-20 17:51:01,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:01,396 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 17:51:01,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297951665] [2021-01-20 17:51:01,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659146581] [2021-01-20 17:51:01,396 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 17:51:01,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:51:01,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:01,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:01,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:01,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:01,673 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 17:51:01,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:01,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:51:01,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664383540] [2021-01-20 17:51:01,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:51:01,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:01,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:51:01,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:51:01,675 INFO L87 Difference]: Start difference. First operand 363450 states and 1060362 transitions. 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 17:51:05,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:05,429 INFO L93 Difference]: Finished difference Result 367290 states and 1071562 transitions. [2021-01-20 17:51:05,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 17:51:05,430 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 17:51:05,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:05,431 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=429, Invalid=1211, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 17:51:05,431 INFO L78 Accepts]: Start accepts. Automaton has 367290 states and 1071562 transitions. Word has length 53 [2021-01-20 17:51:05,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:05,431 INFO L481 AbstractCegarLoop]: Abstraction has 367290 states and 1071562 transitions. [2021-01-20 17:51:05,431 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 17:51:05,432 INFO L276 IsEmpty]: Start isEmpty. Operand 367290 states and 1071562 transitions. [2021-01-20 17:51:05,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:05,561 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:05,561 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 17:51:05,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-20 17:51:05,768 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:05,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:05,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1615896897, now seen corresponding path program 27 times [2021-01-20 17:51:05,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:05,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779203761] [2021-01-20 17:51:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:05,936 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 17:51:05,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779203761] [2021-01-20 17:51:05,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079188633] [2021-01-20 17:51:05,937 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 17:51:06,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 17:51:06,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:06,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:06,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:06,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:06,245 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 17:51:06,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:06,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:51:06,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900578025] [2021-01-20 17:51:06,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:51:06,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:06,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:51:06,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:51:06,247 INFO L87 Difference]: Start difference. First operand 367290 states and 1071562 transitions. 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 17:51:09,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:09,171 INFO L93 Difference]: Finished difference Result 379834 states and 1108234 transitions. [2021-01-20 17:51:09,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 17:51:09,172 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 17:51:09,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:09,172 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=456, Invalid=1350, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 17:51:09,172 INFO L78 Accepts]: Start accepts. Automaton has 379834 states and 1108234 transitions. Word has length 53 [2021-01-20 17:51:09,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:09,173 INFO L481 AbstractCegarLoop]: Abstraction has 379834 states and 1108234 transitions. [2021-01-20 17:51:09,173 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 17:51:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 379834 states and 1108234 transitions. [2021-01-20 17:51:09,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:09,243 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:09,243 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 17:51:09,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:09,444 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:09,444 INFO L82 PathProgramCache]: Analyzing trace with hash 880108089, now seen corresponding path program 28 times [2021-01-20 17:51:09,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:09,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762465245] [2021-01-20 17:51:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:09,595 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 17:51:09,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762465245] [2021-01-20 17:51:09,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16204183] [2021-01-20 17:51:09,596 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 17:51:09,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:51:09,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:09,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:09,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:09,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:09,858 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 17:51:09,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:09,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:51:09,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765747627] [2021-01-20 17:51:09,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:51:09,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:09,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:51:09,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:51:09,860 INFO L87 Difference]: Start difference. First operand 379834 states and 1108234 transitions. 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 17:51:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:13,857 INFO L93 Difference]: Finished difference Result 383418 states and 1118666 transitions. [2021-01-20 17:51:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 17:51:13,857 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 17:51:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:13,858 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 17:51:13,858 INFO L78 Accepts]: Start accepts. Automaton has 383418 states and 1118666 transitions. Word has length 53 [2021-01-20 17:51:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:13,858 INFO L481 AbstractCegarLoop]: Abstraction has 383418 states and 1118666 transitions. [2021-01-20 17:51:13,858 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 17:51:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 383418 states and 1118666 transitions. [2021-01-20 17:51:13,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:13,964 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:13,964 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 17:51:14,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-20 17:51:14,179 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:14,179 INFO L82 PathProgramCache]: Analyzing trace with hash 840549663, now seen corresponding path program 29 times [2021-01-20 17:51:14,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:14,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562296302] [2021-01-20 17:51:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:14,328 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 17:51:14,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562296302] [2021-01-20 17:51:14,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086944777] [2021-01-20 17:51:14,330 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 17:51:14,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:51:14,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:14,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:14,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:14,612 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:14,622 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 17:51:14,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:14,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:51:14,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271924502] [2021-01-20 17:51:14,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:51:14,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:14,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:51:14,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:51:14,627 INFO L87 Difference]: Start difference. First operand 383418 states and 1118666 transitions. 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 17:51:17,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:17,708 INFO L93 Difference]: Finished difference Result 385786 states and 1125578 transitions. [2021-01-20 17:51:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 17:51:17,709 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 17:51:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:17,709 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=423, Invalid=1383, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 17:51:17,709 INFO L78 Accepts]: Start accepts. Automaton has 385786 states and 1125578 transitions. Word has length 53 [2021-01-20 17:51:17,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:17,710 INFO L481 AbstractCegarLoop]: Abstraction has 385786 states and 1125578 transitions. [2021-01-20 17:51:17,710 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 17:51:17,710 INFO L276 IsEmpty]: Start isEmpty. Operand 385786 states and 1125578 transitions. [2021-01-20 17:51:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:17,806 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:17,807 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 17:51:18,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:18,007 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:18,008 INFO L82 PathProgramCache]: Analyzing trace with hash -958412647, now seen corresponding path program 30 times [2021-01-20 17:51:18,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:18,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134646312] [2021-01-20 17:51:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:18,172 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 17:51:18,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134646312] [2021-01-20 17:51:18,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425806387] [2021-01-20 17:51:18,172 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 17:51:18,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-20 17:51:18,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:18,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:18,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:18,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:18,480 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 17:51:18,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:18,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:51:18,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602431494] [2021-01-20 17:51:18,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:51:18,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:18,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:51:18,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:51:18,482 INFO L87 Difference]: Start difference. First operand 385786 states and 1125578 transitions. 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 17:51:22,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:22,678 INFO L93 Difference]: Finished difference Result 387386 states and 1130250 transitions. [2021-01-20 17:51:22,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 17:51:22,679 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 17:51:22,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:22,679 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 17:51:22,679 INFO L78 Accepts]: Start accepts. Automaton has 387386 states and 1130250 transitions. Word has length 53 [2021-01-20 17:51:22,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:22,680 INFO L481 AbstractCegarLoop]: Abstraction has 387386 states and 1130250 transitions. [2021-01-20 17:51:22,680 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 17:51:22,680 INFO L276 IsEmpty]: Start isEmpty. Operand 387386 states and 1130250 transitions. [2021-01-20 17:51:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:22,796 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:22,796 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 17:51:23,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-20 17:51:23,010 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:23,011 INFO L82 PathProgramCache]: Analyzing trace with hash -854790029, now seen corresponding path program 31 times [2021-01-20 17:51:23,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:23,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697950993] [2021-01-20 17:51:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:23,420 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-20 17:51:23,623 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 17:51:23,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697950993] [2021-01-20 17:51:23,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180884978] [2021-01-20 17:51:23,624 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 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 17:51:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:23,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:23,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:24,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:24,730 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 17:51:24,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:24,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:51:24,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365468382] [2021-01-20 17:51:24,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:51:24,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:24,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:51:24,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:51:24,731 INFO L87 Difference]: Start difference. First operand 387386 states and 1130250 transitions. 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 17:51:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:28,815 INFO L93 Difference]: Finished difference Result 389690 states and 1136970 transitions. [2021-01-20 17:51:28,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 17:51:28,816 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 17:51:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:28,817 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=515, Invalid=1741, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 17:51:28,817 INFO L78 Accepts]: Start accepts. Automaton has 389690 states and 1136970 transitions. Word has length 53 [2021-01-20 17:51:28,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:28,818 INFO L481 AbstractCegarLoop]: Abstraction has 389690 states and 1136970 transitions. [2021-01-20 17:51:28,818 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 17:51:28,818 INFO L276 IsEmpty]: Start isEmpty. Operand 389690 states and 1136970 transitions. [2021-01-20 17:51:29,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:29,046 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:29,047 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 17:51:29,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-20 17:51:29,261 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:29,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:29,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1725522547, now seen corresponding path program 32 times [2021-01-20 17:51:29,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:29,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793289357] [2021-01-20 17:51:29,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:29,482 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 17:51:29,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793289357] [2021-01-20 17:51:29,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927795893] [2021-01-20 17:51:29,483 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 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 17:51:29,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:51:29,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:29,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:29,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:29,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:29,742 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 17:51:29,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:29,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:51:29,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648508930] [2021-01-20 17:51:29,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:51:29,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:29,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:51:29,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:51:29,746 INFO L87 Difference]: Start difference. First operand 389690 states and 1136970 transitions. 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 17:51:33,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:33,469 INFO L93 Difference]: Finished difference Result 393274 states and 1147402 transitions. [2021-01-20 17:51:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-20 17:51:33,470 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 17:51:33,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:33,476 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 17:51:33,476 INFO L78 Accepts]: Start accepts. Automaton has 393274 states and 1147402 transitions. Word has length 53 [2021-01-20 17:51:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:33,477 INFO L481 AbstractCegarLoop]: Abstraction has 393274 states and 1147402 transitions. [2021-01-20 17:51:33,477 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 17:51:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 393274 states and 1147402 transitions. [2021-01-20 17:51:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:33,585 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:33,586 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 17:51:33,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-20 17:51:33,798 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:33,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:33,799 INFO L82 PathProgramCache]: Analyzing trace with hash 2141327283, now seen corresponding path program 33 times [2021-01-20 17:51:33,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:33,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653920780] [2021-01-20 17:51:33,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:34,077 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 17:51:34,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653920780] [2021-01-20 17:51:34,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443480448] [2021-01-20 17:51:34,077 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 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 17:51:34,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 17:51:34,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:34,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:34,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:34,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:51:35,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:35,187 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 17:51:35,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:35,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:51:35,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048172713] [2021-01-20 17:51:35,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:51:35,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:35,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:51:35,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:51:35,189 INFO L87 Difference]: Start difference. First operand 393274 states and 1147402 transitions. 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 17:51:40,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:40,069 INFO L93 Difference]: Finished difference Result 416250 states and 1214410 transitions. [2021-01-20 17:51:40,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-20 17:51:40,070 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 17:51:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:40,071 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1022, Invalid=3400, Unknown=0, NotChecked=0, Total=4422 [2021-01-20 17:51:40,071 INFO L78 Accepts]: Start accepts. Automaton has 416250 states and 1214410 transitions. Word has length 53 [2021-01-20 17:51:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:40,072 INFO L481 AbstractCegarLoop]: Abstraction has 416250 states and 1214410 transitions. [2021-01-20 17:51:40,072 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 17:51:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 416250 states and 1214410 transitions. [2021-01-20 17:51:40,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:40,183 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:40,184 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 17:51:40,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-01-20 17:51:40,396 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash -270011115, now seen corresponding path program 34 times [2021-01-20 17:51:40,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:40,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277779468] [2021-01-20 17:51:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:40,618 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 17:51:40,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277779468] [2021-01-20 17:51:40,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383811714] [2021-01-20 17:51:40,619 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 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 17:51:40,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:51:40,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:40,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 17:51:40,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:41,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:41,046 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 17:51:41,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:41,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:51:41,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440775677] [2021-01-20 17:51:41,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:51:41,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:41,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:51:41,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:51:41,048 INFO L87 Difference]: Start difference. First operand 416250 states and 1214410 transitions. 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 17:51:45,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:45,995 INFO L93 Difference]: Finished difference Result 418362 states and 1220554 transitions. [2021-01-20 17:51:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-20 17:51:45,997 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 17:51:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:45,999 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=666, Invalid=2090, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 17:51:45,999 INFO L78 Accepts]: Start accepts. Automaton has 418362 states and 1220554 transitions. Word has length 53 [2021-01-20 17:51:46,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:46,000 INFO L481 AbstractCegarLoop]: Abstraction has 418362 states and 1220554 transitions. [2021-01-20 17:51:46,003 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 17:51:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 418362 states and 1220554 transitions. [2021-01-20 17:51:46,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:46,221 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:46,236 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 17:51:46,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:46,451 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:46,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:46,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1452069749, now seen corresponding path program 35 times [2021-01-20 17:51:46,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:46,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640926898] [2021-01-20 17:51:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:46,670 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 17:51:46,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640926898] [2021-01-20 17:51:46,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881386002] [2021-01-20 17:51:46,672 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 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 17:51:46,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:51:46,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:46,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:46,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:46,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:46,887 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 17:51:46,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:46,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:51:46,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827739263] [2021-01-20 17:51:46,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:51:46,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:46,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:51:46,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:51:46,889 INFO L87 Difference]: Start difference. First operand 418362 states and 1220554 transitions. 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 17:51:50,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:50,794 INFO L93 Difference]: Finished difference Result 419258 states and 1223178 transitions. [2021-01-20 17:51:50,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 17:51:50,795 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 17:51:50,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:50,796 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=627, Invalid=1923, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 17:51:50,796 INFO L78 Accepts]: Start accepts. Automaton has 419258 states and 1223178 transitions. Word has length 53 [2021-01-20 17:51:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:50,796 INFO L481 AbstractCegarLoop]: Abstraction has 419258 states and 1223178 transitions. [2021-01-20 17:51:50,797 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 17:51:50,797 INFO L276 IsEmpty]: Start isEmpty. Operand 419258 states and 1223178 transitions. [2021-01-20 17:51:50,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:50,939 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:50,939 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 17:51:51,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-20 17:51:51,143 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:51,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:51,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2086896775, now seen corresponding path program 36 times [2021-01-20 17:51:51,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:51,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942581706] [2021-01-20 17:51:51,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:51,510 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 17:51:51,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942581706] [2021-01-20 17:51:51,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952895622] [2021-01-20 17:51:51,510 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 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 17:51:51,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-20 17:51:51,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:51,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:51,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:51,708 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:51:51,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:51,726 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 17:51:51,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:51,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:51:51,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363288848] [2021-01-20 17:51:51,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:51:51,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:51,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:51:51,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:51:51,728 INFO L87 Difference]: Start difference. First operand 419258 states and 1223178 transitions. 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 17:51:57,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:57,695 INFO L93 Difference]: Finished difference Result 435258 states and 1269770 transitions. [2021-01-20 17:51:57,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-20 17:51:57,696 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 17:51:57,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:57,697 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1047, Invalid=3243, Unknown=0, NotChecked=0, Total=4290 [2021-01-20 17:51:57,697 INFO L78 Accepts]: Start accepts. Automaton has 435258 states and 1269770 transitions. Word has length 53 [2021-01-20 17:51:57,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:57,697 INFO L481 AbstractCegarLoop]: Abstraction has 435258 states and 1269770 transitions. [2021-01-20 17:51:57,697 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 17:51:57,697 INFO L276 IsEmpty]: Start isEmpty. Operand 435258 states and 1269770 transitions. [2021-01-20 17:51:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:57,921 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:57,921 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 17:51:58,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:58,135 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:58,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:58,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2038569245, now seen corresponding path program 3 times [2021-01-20 17:51:58,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:58,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815189380] [2021-01-20 17:51:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:58,649 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 6 [2021-01-20 17:51:58,817 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 17:51:58,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815189380] [2021-01-20 17:51:58,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954179565] [2021-01-20 17:51:58,818 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 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 17:51:58,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 17:51:58,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:58,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:58,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:59,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:59,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:59,125 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 17:51:59,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:59,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:59,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471411552] [2021-01-20 17:51:59,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:59,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:59,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:59,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:59,128 INFO L87 Difference]: Start difference. First operand 435258 states and 1269770 transitions. 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 17:52:03,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:52:03,819 INFO L93 Difference]: Finished difference Result 445226 states and 1298666 transitions. [2021-01-20 17:52:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 17:52:03,820 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 17:52:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:52:03,835 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 17:52:03,835 INFO L78 Accepts]: Start accepts. Automaton has 445226 states and 1298666 transitions. Word has length 58 [2021-01-20 17:52:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:52:03,835 INFO L481 AbstractCegarLoop]: Abstraction has 445226 states and 1298666 transitions. [2021-01-20 17:52:03,836 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 17:52:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 445226 states and 1298666 transitions. [2021-01-20 17:52:04,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:52:04,207 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:52:04,210 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 17:52:04,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-20 17:52:04,424 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:52:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:52:04,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1808185776, now seen corresponding path program 7 times [2021-01-20 17:52:04,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:52:04,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326248159] [2021-01-20 17:52:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:52:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:52:04,749 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 17:52:04,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326248159] [2021-01-20 17:52:04,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791063146] [2021-01-20 17:52:04,749 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 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 17:52:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:52:04,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:52:04,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:52:05,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:52:05,091 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 17:52:05,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:52:05,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:52:05,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569296636] [2021-01-20 17:52:05,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:52:05,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:52:05,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:52:05,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:52:05,093 INFO L87 Difference]: Start difference. First operand 445226 states and 1298666 transitions. 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 17:52:08,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:52:08,591 INFO L93 Difference]: Finished difference Result 446314 states and 1301866 transitions. [2021-01-20 17:52:08,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 17:52:08,592 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 17:52:08,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:52:08,593 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 17:52:08,593 INFO L78 Accepts]: Start accepts. Automaton has 446314 states and 1301866 transitions. Word has length 58 [2021-01-20 17:52:08,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:52:08,593 INFO L481 AbstractCegarLoop]: Abstraction has 446314 states and 1301866 transitions. [2021-01-20 17:52:08,594 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 17:52:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 446314 states and 1301866 transitions. [2021-01-20 17:52:08,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:52:08,870 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:52:08,879 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 17:52:09,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-20 17:52:09,092 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:52:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:52:09,093 INFO L82 PathProgramCache]: Analyzing trace with hash 804219266, now seen corresponding path program 8 times [2021-01-20 17:52:09,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:52:09,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869219158] [2021-01-20 17:52:09,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:52:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:52:09,323 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 17:52:09,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869219158] [2021-01-20 17:52:09,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251647051] [2021-01-20 17:52:09,324 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 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 17:52:09,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:52:09,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:52:09,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 17:52:09,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:52:09,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:52:09,497 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 17:52:09,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:52:09,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-01-20 17:52:09,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311720804] [2021-01-20 17:52:09,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:52:09,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:52:09,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:52:09,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:52:09,499 INFO L87 Difference]: Start difference. First operand 446314 states and 1301866 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 17:52:13,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:52:13,979 INFO L93 Difference]: Finished difference Result 457770 states and 1335402 transitions. [2021-01-20 17:52:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 17:52:13,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 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 17:52:13,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:52:13,981 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=454, Invalid=1526, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 17:52:13,981 INFO L78 Accepts]: Start accepts. Automaton has 457770 states and 1335402 transitions. Word has length 58 [2021-01-20 17:52:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:52:13,981 INFO L481 AbstractCegarLoop]: Abstraction has 457770 states and 1335402 transitions. [2021-01-20 17:52:13,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 17:52:13,981 INFO L276 IsEmpty]: Start isEmpty. Operand 457770 states and 1335402 transitions.