/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 19:01:47,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 19:01:47,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 19:01:47,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 19:01:47,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 19:01:47,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 19:01:47,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 19:01:47,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 19:01:47,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 19:01:47,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 19:01:47,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 19:01:47,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 19:01:47,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 19:01:47,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 19:01:47,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 19:01:47,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 19:01:47,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 19:01:47,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 19:01:47,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 19:01:47,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 19:01:47,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 19:01:47,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 19:01:47,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 19:01:47,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 19:01:47,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 19:01:47,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 19:01:47,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 19:01:47,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 19:01:47,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 19:01:47,418 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 19:01:47,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 19:01:47,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 19:01:47,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 19:01:47,420 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 19:01:47,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 19:01:47,420 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 19:01:47,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 19:01:47,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 19:01:47,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 19:01:47,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 19:01:47,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 19:01:47,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 19:01:47,422 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 19:01:47,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 19:01:47,422 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 19:01:47,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 19:01:47,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 19:01:47,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 19:01:47,423 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 19:01:47,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 19:01:47,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 19:01:47,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 19:01:47,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 19:01:47,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 19:01:47,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 19:01:47,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 19:01:47,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 19:01:47,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 19:01:47,425 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 19:01:47,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 19:01:47,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 19:01:47,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 19:01:47,816 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 19:01:47,818 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 19:01:47,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-23 19:01:47,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbd3202e7/09845bd8d12d4358b26e25e96ce8aca7/FLAG44aac716d [2020-10-23 19:01:48,727 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 19:01:48,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-23 19:01:48,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbd3202e7/09845bd8d12d4358b26e25e96ce8aca7/FLAG44aac716d [2020-10-23 19:01:48,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbd3202e7/09845bd8d12d4358b26e25e96ce8aca7 [2020-10-23 19:01:48,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 19:01:48,908 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 19:01:48,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 19:01:48,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 19:01:48,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 19:01:48,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:01:48" (1/1) ... [2020-10-23 19:01:48,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6823a1ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:48, skipping insertion in model container [2020-10-23 19:01:48,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:01:48" (1/1) ... [2020-10-23 19:01:48,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 19:01:49,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 19:01:50,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:01:50,116 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 19:01:50,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:01:50,579 INFO L208 MainTranslator]: Completed translation [2020-10-23 19:01:50,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:50 WrapperNode [2020-10-23 19:01:50,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 19:01:50,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 19:01:50,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 19:01:50,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 19:01:50,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:50" (1/1) ... [2020-10-23 19:01:50,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:50" (1/1) ... [2020-10-23 19:01:50,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:50" (1/1) ... [2020-10-23 19:01:50,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:50" (1/1) ... [2020-10-23 19:01:50,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:50" (1/1) ... [2020-10-23 19:01:50,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:50" (1/1) ... [2020-10-23 19:01:50,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:50" (1/1) ... [2020-10-23 19:01:50,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 19:01:50,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 19:01:50,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 19:01:50,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 19:01:50,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:50" (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 [2020-10-23 19:01:50,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 19:01:50,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 19:01:50,864 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 19:01:50,864 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 19:01:50,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 19:01:50,865 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 19:01:50,865 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 19:01:50,865 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 19:01:50,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 19:01:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 19:01:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-23 19:01:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 19:01:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 19:01:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 19:01:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 19:01:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 19:01:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 19:01:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 19:01:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 19:01:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-23 19:01:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 19:01:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 19:01:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 19:01:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 19:01:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 19:01:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 19:01:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 19:01:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 19:01:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 19:01:53,764 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 19:01:53,764 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 19:01:53,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:01:53 BoogieIcfgContainer [2020-10-23 19:01:53,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 19:01:53,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 19:01:53,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 19:01:53,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 19:01:53,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:01:48" (1/3) ... [2020-10-23 19:01:53,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c07e181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:01:53, skipping insertion in model container [2020-10-23 19:01:53,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:50" (2/3) ... [2020-10-23 19:01:53,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c07e181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:01:53, skipping insertion in model container [2020-10-23 19:01:53,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:01:53" (3/3) ... [2020-10-23 19:01:53,779 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-23 19:01:53,791 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 19:01:53,797 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 19:01:53,811 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 19:01:53,855 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 19:01:53,855 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 19:01:53,855 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 19:01:53,855 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 19:01:53,855 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 19:01:53,855 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 19:01:53,856 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 19:01:53,856 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 19:01:53,896 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states. [2020-10-23 19:01:53,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-23 19:01:53,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:53,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:01:53,941 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:53,947 INFO L82 PathProgramCache]: Analyzing trace with hash 471360347, now seen corresponding path program 1 times [2020-10-23 19:01:53,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:53,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599134349] [2020-10-23 19:01:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:55,594 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:01:55,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:01:55,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599134349] [2020-10-23 19:01:55,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:55,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:55,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982353625] [2020-10-23 19:01:55,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:55,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:55,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:55,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:55,913 INFO L87 Difference]: Start difference. First operand 812 states. Second operand 4 states. [2020-10-23 19:01:56,808 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-23 19:02:02,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:02,203 INFO L93 Difference]: Finished difference Result 1533 states and 2691 transitions. [2020-10-23 19:02:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:02,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-23 19:02:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:02,249 INFO L225 Difference]: With dead ends: 1533 [2020-10-23 19:02:02,250 INFO L226 Difference]: Without dead ends: 1313 [2020-10-23 19:02:02,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:02,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2020-10-23 19:02:02,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1310. [2020-10-23 19:02:02,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-10-23 19:02:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 2041 transitions. [2020-10-23 19:02:02,443 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 2041 transitions. Word has length 331 [2020-10-23 19:02:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:02,450 INFO L481 AbstractCegarLoop]: Abstraction has 1310 states and 2041 transitions. [2020-10-23 19:02:02,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 2041 transitions. [2020-10-23 19:02:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-23 19:02:02,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:02,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:02:02,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 19:02:02,461 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:02,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:02,463 INFO L82 PathProgramCache]: Analyzing trace with hash -834488451, now seen corresponding path program 1 times [2020-10-23 19:02:02,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:02,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112657585] [2020-10-23 19:02:02,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:03,647 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:03,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:03,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112657585] [2020-10-23 19:02:03,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:03,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:03,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451031920] [2020-10-23 19:02:03,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:03,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:03,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:03,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:03,894 INFO L87 Difference]: Start difference. First operand 1310 states and 2041 transitions. Second operand 4 states. [2020-10-23 19:02:04,582 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-23 19:02:09,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:09,131 INFO L93 Difference]: Finished difference Result 2686 states and 4216 transitions. [2020-10-23 19:02:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:09,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-23 19:02:09,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:09,147 INFO L225 Difference]: With dead ends: 2686 [2020-10-23 19:02:09,148 INFO L226 Difference]: Without dead ends: 2303 [2020-10-23 19:02:09,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2020-10-23 19:02:09,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2300. [2020-10-23 19:02:09,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2300 states. [2020-10-23 19:02:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 3577 transitions. [2020-10-23 19:02:09,260 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 3577 transitions. Word has length 331 [2020-10-23 19:02:09,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:09,261 INFO L481 AbstractCegarLoop]: Abstraction has 2300 states and 3577 transitions. [2020-10-23 19:02:09,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:09,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 3577 transitions. [2020-10-23 19:02:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-23 19:02:09,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:09,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:02:09,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 19:02:09,273 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:09,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:09,274 INFO L82 PathProgramCache]: Analyzing trace with hash -159708538, now seen corresponding path program 1 times [2020-10-23 19:02:09,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:09,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188052036] [2020-10-23 19:02:09,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:10,140 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:10,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:10,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188052036] [2020-10-23 19:02:10,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:10,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:10,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029482639] [2020-10-23 19:02:10,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:10,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:10,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:10,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:10,322 INFO L87 Difference]: Start difference. First operand 2300 states and 3577 transitions. Second operand 4 states. [2020-10-23 19:02:11,018 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-23 19:02:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:15,371 INFO L93 Difference]: Finished difference Result 4870 states and 7637 transitions. [2020-10-23 19:02:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:15,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-23 19:02:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:15,395 INFO L225 Difference]: With dead ends: 4870 [2020-10-23 19:02:15,395 INFO L226 Difference]: Without dead ends: 4203 [2020-10-23 19:02:15,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:15,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2020-10-23 19:02:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 4200. [2020-10-23 19:02:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4200 states. [2020-10-23 19:02:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 6517 transitions. [2020-10-23 19:02:15,534 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 6517 transitions. Word has length 331 [2020-10-23 19:02:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:15,535 INFO L481 AbstractCegarLoop]: Abstraction has 4200 states and 6517 transitions. [2020-10-23 19:02:15,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 6517 transitions. [2020-10-23 19:02:15,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-23 19:02:15,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:15,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:02:15,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 19:02:15,547 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:15,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:15,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1289694683, now seen corresponding path program 1 times [2020-10-23 19:02:15,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:15,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682529865] [2020-10-23 19:02:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:16,835 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:16,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:17,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682529865] [2020-10-23 19:02:17,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:17,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:02:17,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685058861] [2020-10-23 19:02:17,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:02:17,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:17,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:02:17,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:17,068 INFO L87 Difference]: Start difference. First operand 4200 states and 6517 transitions. Second operand 5 states. [2020-10-23 19:02:23,263 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:02:25,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:25,157 INFO L93 Difference]: Finished difference Result 12417 states and 19248 transitions. [2020-10-23 19:02:25,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:02:25,158 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-23 19:02:25,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:25,198 INFO L225 Difference]: With dead ends: 12417 [2020-10-23 19:02:25,198 INFO L226 Difference]: Without dead ends: 8232 [2020-10-23 19:02:25,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:02:25,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2020-10-23 19:02:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 8229. [2020-10-23 19:02:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8229 states. [2020-10-23 19:02:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 12695 transitions. [2020-10-23 19:02:25,550 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 12695 transitions. Word has length 331 [2020-10-23 19:02:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:25,551 INFO L481 AbstractCegarLoop]: Abstraction has 8229 states and 12695 transitions. [2020-10-23 19:02:25,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:02:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 12695 transitions. [2020-10-23 19:02:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-23 19:02:25,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:25,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:02:25,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 19:02:25,571 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:25,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1375168706, now seen corresponding path program 1 times [2020-10-23 19:02:25,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:25,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197816375] [2020-10-23 19:02:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:26,429 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:26,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:26,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197816375] [2020-10-23 19:02:26,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:26,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:26,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541439702] [2020-10-23 19:02:26,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:26,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:26,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:26,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:26,664 INFO L87 Difference]: Start difference. First operand 8229 states and 12695 transitions. Second operand 4 states. [2020-10-23 19:02:34,246 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-23 19:02:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:36,206 INFO L93 Difference]: Finished difference Result 24236 states and 37321 transitions. [2020-10-23 19:02:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:36,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-10-23 19:02:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:36,274 INFO L225 Difference]: With dead ends: 24236 [2020-10-23 19:02:36,274 INFO L226 Difference]: Without dead ends: 16136 [2020-10-23 19:02:36,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16136 states. [2020-10-23 19:02:36,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16136 to 16133. [2020-10-23 19:02:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16133 states. [2020-10-23 19:02:36,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16133 states to 16133 states and 24742 transitions. [2020-10-23 19:02:36,856 INFO L78 Accepts]: Start accepts. Automaton has 16133 states and 24742 transitions. Word has length 333 [2020-10-23 19:02:36,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:36,857 INFO L481 AbstractCegarLoop]: Abstraction has 16133 states and 24742 transitions. [2020-10-23 19:02:36,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:36,857 INFO L276 IsEmpty]: Start isEmpty. Operand 16133 states and 24742 transitions. [2020-10-23 19:02:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-23 19:02:36,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:36,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:02:36,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 19:02:36,891 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:36,892 INFO L82 PathProgramCache]: Analyzing trace with hash -129823331, now seen corresponding path program 1 times [2020-10-23 19:02:36,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:36,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189652660] [2020-10-23 19:02:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:37,664 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:37,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:37,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189652660] [2020-10-23 19:02:37,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:37,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:37,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696717357] [2020-10-23 19:02:37,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:37,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:37,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:37,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:37,775 INFO L87 Difference]: Start difference. First operand 16133 states and 24742 transitions. Second operand 4 states. [2020-10-23 19:02:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:46,960 INFO L93 Difference]: Finished difference Result 48322 states and 74101 transitions. [2020-10-23 19:02:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:02:46,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-10-23 19:02:46,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:47,044 INFO L225 Difference]: With dead ends: 48322 [2020-10-23 19:02:47,045 INFO L226 Difference]: Without dead ends: 32231 [2020-10-23 19:02:47,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:47,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32231 states. [2020-10-23 19:02:48,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16152. [2020-10-23 19:02:48,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16152 states. [2020-10-23 19:02:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16152 states to 16152 states and 24770 transitions. [2020-10-23 19:02:48,079 INFO L78 Accepts]: Start accepts. Automaton has 16152 states and 24770 transitions. Word has length 333 [2020-10-23 19:02:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:48,080 INFO L481 AbstractCegarLoop]: Abstraction has 16152 states and 24770 transitions. [2020-10-23 19:02:48,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 16152 states and 24770 transitions. [2020-10-23 19:02:48,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-23 19:02:48,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:48,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:02:48,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 19:02:48,110 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:48,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:48,111 INFO L82 PathProgramCache]: Analyzing trace with hash -120615702, now seen corresponding path program 1 times [2020-10-23 19:02:48,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:48,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396273342] [2020-10-23 19:02:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:48,833 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:48,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:48,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396273342] [2020-10-23 19:02:48,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:48,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:48,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258680493] [2020-10-23 19:02:48,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:48,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:48,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:48,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:48,946 INFO L87 Difference]: Start difference. First operand 16152 states and 24770 transitions. Second operand 4 states. [2020-10-23 19:02:58,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:58,496 INFO L93 Difference]: Finished difference Result 48341 states and 74122 transitions. [2020-10-23 19:02:58,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:02:58,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-10-23 19:02:58,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:58,560 INFO L225 Difference]: With dead ends: 48341 [2020-10-23 19:02:58,560 INFO L226 Difference]: Without dead ends: 32249 [2020-10-23 19:02:58,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:58,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32249 states. [2020-10-23 19:02:59,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32249 to 16170. [2020-10-23 19:02:59,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16170 states. [2020-10-23 19:02:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16170 states to 16170 states and 24791 transitions. [2020-10-23 19:02:59,179 INFO L78 Accepts]: Start accepts. Automaton has 16170 states and 24791 transitions. Word has length 334 [2020-10-23 19:02:59,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:59,179 INFO L481 AbstractCegarLoop]: Abstraction has 16170 states and 24791 transitions. [2020-10-23 19:02:59,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand 16170 states and 24791 transitions. [2020-10-23 19:02:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-23 19:02:59,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:59,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:02:59,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 19:02:59,209 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:59,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2113029625, now seen corresponding path program 1 times [2020-10-23 19:02:59,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:59,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556983774] [2020-10-23 19:02:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:00,097 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:03:00,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:00,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556983774] [2020-10-23 19:03:00,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:00,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:03:00,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235553924] [2020-10-23 19:03:00,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:03:00,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:00,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:03:00,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:03:00,282 INFO L87 Difference]: Start difference. First operand 16170 states and 24791 transitions. Second operand 4 states. [2020-10-23 19:03:08,291 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-23 19:03:10,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:10,577 INFO L93 Difference]: Finished difference Result 45821 states and 70102 transitions. [2020-10-23 19:03:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:03:10,578 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-10-23 19:03:10,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:10,636 INFO L225 Difference]: With dead ends: 45821 [2020-10-23 19:03:10,636 INFO L226 Difference]: Without dead ends: 29896 [2020-10-23 19:03:10,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:10,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29896 states. [2020-10-23 19:03:11,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29896 to 29893. [2020-10-23 19:03:11,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29893 states. [2020-10-23 19:03:11,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29893 states to 29893 states and 45507 transitions. [2020-10-23 19:03:11,935 INFO L78 Accepts]: Start accepts. Automaton has 29893 states and 45507 transitions. Word has length 335 [2020-10-23 19:03:11,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:11,936 INFO L481 AbstractCegarLoop]: Abstraction has 29893 states and 45507 transitions. [2020-10-23 19:03:11,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:03:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand 29893 states and 45507 transitions. [2020-10-23 19:03:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-23 19:03:11,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:11,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:03:11,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 19:03:11,978 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:11,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1554778250, now seen corresponding path program 1 times [2020-10-23 19:03:11,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:11,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547080393] [2020-10-23 19:03:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:12,978 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:03:12,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:13,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547080393] [2020-10-23 19:03:13,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:13,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:03:13,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258950775] [2020-10-23 19:03:13,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:03:13,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:13,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:03:13,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:13,256 INFO L87 Difference]: Start difference. First operand 29893 states and 45507 transitions. Second operand 5 states. [2020-10-23 19:03:20,787 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:03:23,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:23,340 INFO L93 Difference]: Finished difference Result 88199 states and 134054 transitions. [2020-10-23 19:03:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:03:23,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-10-23 19:03:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:23,418 INFO L225 Difference]: With dead ends: 88199 [2020-10-23 19:03:23,418 INFO L226 Difference]: Without dead ends: 58365 [2020-10-23 19:03:23,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:03:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58365 states. [2020-10-23 19:03:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58365 to 58362. [2020-10-23 19:03:25,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58362 states. [2020-10-23 19:03:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58362 states to 58362 states and 88200 transitions. [2020-10-23 19:03:26,107 INFO L78 Accepts]: Start accepts. Automaton has 58362 states and 88200 transitions. Word has length 335 [2020-10-23 19:03:26,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:26,108 INFO L481 AbstractCegarLoop]: Abstraction has 58362 states and 88200 transitions. [2020-10-23 19:03:26,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:03:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 58362 states and 88200 transitions. [2020-10-23 19:03:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-23 19:03:26,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:26,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:03:26,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 19:03:26,154 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:26,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:26,155 INFO L82 PathProgramCache]: Analyzing trace with hash -761637660, now seen corresponding path program 1 times [2020-10-23 19:03:26,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:26,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282089185] [2020-10-23 19:03:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:27,373 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:03:27,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:27,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282089185] [2020-10-23 19:03:27,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:27,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:03:27,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232927695] [2020-10-23 19:03:27,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:03:27,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:27,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:03:27,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:27,594 INFO L87 Difference]: Start difference. First operand 58362 states and 88200 transitions. Second operand 5 states. [2020-10-23 19:03:36,762 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:03:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:40,107 INFO L93 Difference]: Finished difference Result 172283 states and 259893 transitions. [2020-10-23 19:03:40,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:03:40,108 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2020-10-23 19:03:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:40,277 INFO L225 Difference]: With dead ends: 172283 [2020-10-23 19:03:40,278 INFO L226 Difference]: Without dead ends: 114042 [2020-10-23 19:03:40,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:03:40,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114042 states. [2020-10-23 19:03:46,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114042 to 114039. [2020-10-23 19:03:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114039 states. [2020-10-23 19:03:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114039 states to 114039 states and 171025 transitions. [2020-10-23 19:03:46,398 INFO L78 Accepts]: Start accepts. Automaton has 114039 states and 171025 transitions. Word has length 337 [2020-10-23 19:03:46,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:46,399 INFO L481 AbstractCegarLoop]: Abstraction has 114039 states and 171025 transitions. [2020-10-23 19:03:46,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:03:46,399 INFO L276 IsEmpty]: Start isEmpty. Operand 114039 states and 171025 transitions. [2020-10-23 19:03:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-23 19:03:46,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:46,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:03:46,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 19:03:46,502 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:46,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1376013622, now seen corresponding path program 1 times [2020-10-23 19:03:46,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:46,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377291656] [2020-10-23 19:03:46,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:47,783 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:03:47,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:48,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377291656] [2020-10-23 19:03:48,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:48,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:03:48,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144566362] [2020-10-23 19:03:48,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:03:48,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:48,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:03:48,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:48,054 INFO L87 Difference]: Start difference. First operand 114039 states and 171025 transitions. Second operand 5 states. [2020-10-23 19:04:00,588 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:04:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:04:05,809 INFO L93 Difference]: Finished difference Result 337035 states and 504608 transitions. [2020-10-23 19:04:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:04:05,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2020-10-23 19:04:05,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:04:06,133 INFO L225 Difference]: With dead ends: 337035 [2020-10-23 19:04:06,134 INFO L226 Difference]: Without dead ends: 223230 [2020-10-23 19:04:06,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:04:06,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223230 states. [2020-10-23 19:04:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223230 to 223227. [2020-10-23 19:04:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223227 states. [2020-10-23 19:04:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223227 states to 223227 states and 332317 transitions. [2020-10-23 19:04:18,385 INFO L78 Accepts]: Start accepts. Automaton has 223227 states and 332317 transitions. Word has length 337 [2020-10-23 19:04:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:04:18,386 INFO L481 AbstractCegarLoop]: Abstraction has 223227 states and 332317 transitions. [2020-10-23 19:04:18,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:04:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 223227 states and 332317 transitions. [2020-10-23 19:04:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-23 19:04:18,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:04:18,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:04:18,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 19:04:18,547 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:04:18,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:04:18,548 INFO L82 PathProgramCache]: Analyzing trace with hash 912889276, now seen corresponding path program 1 times [2020-10-23 19:04:18,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:04:18,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148147783] [2020-10-23 19:04:18,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:04:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:19,676 WARN L193 SmtUtils]: Spent 969.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:04:19,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:04:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:04:19,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148147783] [2020-10-23 19:04:19,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:04:19,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:04:19,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99063078] [2020-10-23 19:04:19,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:04:19,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:04:19,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:04:19,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:04:19,812 INFO L87 Difference]: Start difference. First operand 223227 states and 332317 transitions. Second operand 4 states. [2020-10-23 19:04:39,733 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-23 19:04:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:04:48,185 INFO L93 Difference]: Finished difference Result 658961 states and 979031 transitions. [2020-10-23 19:04:48,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:04:48,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-10-23 19:04:48,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:04:49,056 INFO L225 Difference]: With dead ends: 658961 [2020-10-23 19:04:49,056 INFO L226 Difference]: Without dead ends: 437118 [2020-10-23 19:04:49,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:04:49,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437118 states. [2020-10-23 19:05:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437118 to 437115. [2020-10-23 19:05:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437115 states. [2020-10-23 19:05:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437115 states to 437115 states and 645851 transitions. [2020-10-23 19:05:11,820 INFO L78 Accepts]: Start accepts. Automaton has 437115 states and 645851 transitions. Word has length 339 [2020-10-23 19:05:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:05:11,821 INFO L481 AbstractCegarLoop]: Abstraction has 437115 states and 645851 transitions. [2020-10-23 19:05:11,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:05:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 437115 states and 645851 transitions. [2020-10-23 19:05:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-23 19:05:12,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:12,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:05:12,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 19:05:12,765 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:12,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1411168983, now seen corresponding path program 1 times [2020-10-23 19:05:12,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:12,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921191321] [2020-10-23 19:05:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:13,529 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:05:13,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:05:13,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921191321] [2020-10-23 19:05:13,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:13,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:05:13,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700980257] [2020-10-23 19:05:13,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:05:13,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:13,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:05:13,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:05:13,930 INFO L87 Difference]: Start difference. First operand 437115 states and 645851 transitions. Second operand 4 states.