/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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 19:06:22,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 19:06:22,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 19:06:22,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 19:06:22,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 19:06:22,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 19:06:22,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 19:06:22,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 19:06:22,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 19:06:22,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 19:06:22,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 19:06:22,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 19:06:22,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 19:06:22,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 19:06:22,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 19:06:22,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 19:06:22,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 19:06:22,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 19:06:22,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 19:06:22,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 19:06:22,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 19:06:22,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 19:06:22,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 19:06:22,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 19:06:22,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 19:06:22,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 19:06:22,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 19:06:22,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 19:06:22,656 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 19:06:22,716 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 19:06:22,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 19:06:22,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 19:06:22,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 19:06:22,719 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 19:06:22,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 19:06:22,720 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 19:06:22,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 19:06:22,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 19:06:22,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 19:06:22,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 19:06:22,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 19:06:22,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 19:06:22,721 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 19:06:22,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 19:06:22,722 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 19:06:22,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 19:06:22,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 19:06:22,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 19:06:22,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 19:06:22,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 19:06:22,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 19:06:22,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 19:06:22,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 19:06:22,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 19:06:22,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 19:06:22,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 19:06:22,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 19:06:22,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 19:06:22,725 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 19:06:23,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 19:06:23,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 19:06:23,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 19:06:23,136 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 19:06:23,137 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 19:06:23,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-23 19:06:23,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1581fe8b9/b4286e7b29c44ead88bc5a4384ebdd00/FLAG0e2421bb8 [2020-10-23 19:06:24,273 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 19:06:24,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-23 19:06:24,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1581fe8b9/b4286e7b29c44ead88bc5a4384ebdd00/FLAG0e2421bb8 [2020-10-23 19:06:24,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1581fe8b9/b4286e7b29c44ead88bc5a4384ebdd00 [2020-10-23 19:06:24,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 19:06:24,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 19:06:24,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 19:06:24,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 19:06:24,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 19:06:24,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:06:24" (1/1) ... [2020-10-23 19:06:24,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bbf43ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:06:24, skipping insertion in model container [2020-10-23 19:06:24,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:06:24" (1/1) ... [2020-10-23 19:06:24,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 19:06:25,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 19:06:27,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:06:27,548 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 19:06:29,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:06:29,087 INFO L208 MainTranslator]: Completed translation [2020-10-23 19:06:29,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:06:29 WrapperNode [2020-10-23 19:06:29,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 19:06:29,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 19:06:29,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 19:06:29,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 19:06:29,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:06:29" (1/1) ... [2020-10-23 19:06:29,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:06:29" (1/1) ... [2020-10-23 19:06:29,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:06:29" (1/1) ... [2020-10-23 19:06:29,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:06:29" (1/1) ... [2020-10-23 19:06:29,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:06:29" (1/1) ... [2020-10-23 19:06:29,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:06:29" (1/1) ... [2020-10-23 19:06:29,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:06:29" (1/1) ... [2020-10-23 19:06:29,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 19:06:29,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 19:06:29,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 19:06:29,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 19:06:29,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:06:29" (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 19:06:29,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 19:06:29,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 19:06:29,465 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 19:06:29,465 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 19:06:29,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 19:06:29,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 19:06:29,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 19:06:29,466 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 19:06:29,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 19:06:29,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 19:06:29,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 19:06:29,467 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 19:06:29,467 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 19:06:29,467 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 19:06:29,467 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 19:06:29,468 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 19:06:29,468 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 19:06:29,468 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 19:06:29,468 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-23 19:06:29,468 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-23 19:06:29,468 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 19:06:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 19:06:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 19:06:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 19:06:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 19:06:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 19:06:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 19:06:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 19:06:29,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 19:06:36,169 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 19:06:36,170 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 19:06:36,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:06:36 BoogieIcfgContainer [2020-10-23 19:06:36,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 19:06:36,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 19:06:36,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 19:06:36,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 19:06:36,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:06:24" (1/3) ... [2020-10-23 19:06:36,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a883953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:06:36, skipping insertion in model container [2020-10-23 19:06:36,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:06:29" (2/3) ... [2020-10-23 19:06:36,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a883953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:06:36, skipping insertion in model container [2020-10-23 19:06:36,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:06:36" (3/3) ... [2020-10-23 19:06:36,184 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-23 19:06:36,196 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 19:06:36,203 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 19:06:36,216 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 19:06:36,253 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 19:06:36,253 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 19:06:36,253 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 19:06:36,254 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 19:06:36,254 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 19:06:36,254 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 19:06:36,254 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 19:06:36,254 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 19:06:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states. [2020-10-23 19:06:36,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-23 19:06:36,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:06:36,345 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] [2020-10-23 19:06:36,346 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:06:36,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:06:36,352 INFO L82 PathProgramCache]: Analyzing trace with hash 459972113, now seen corresponding path program 1 times [2020-10-23 19:06:36,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:06:36,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369949532] [2020-10-23 19:06:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:06:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:38,611 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:06:38,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:06:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:38,920 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 19:06:38,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369949532] [2020-10-23 19:06:38,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:06:38,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:06:38,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381022373] [2020-10-23 19:06:38,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:06:38,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:06:38,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:06:38,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:06:38,956 INFO L87 Difference]: Start difference. First operand 2519 states. Second operand 5 states. [2020-10-23 19:06:59,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:06:59,227 INFO L93 Difference]: Finished difference Result 4487 states and 7783 transitions. [2020-10-23 19:06:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:06:59,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2020-10-23 19:06:59,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:06:59,277 INFO L225 Difference]: With dead ends: 4487 [2020-10-23 19:06:59,277 INFO L226 Difference]: Without dead ends: 2511 [2020-10-23 19:06:59,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 19:06:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-10-23 19:06:59,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-10-23 19:06:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-10-23 19:06:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4318 transitions. [2020-10-23 19:06:59,484 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4318 transitions. Word has length 323 [2020-10-23 19:06:59,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:06:59,485 INFO L481 AbstractCegarLoop]: Abstraction has 2511 states and 4318 transitions. [2020-10-23 19:06:59,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:06:59,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4318 transitions. [2020-10-23 19:06:59,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-10-23 19:06:59,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:06:59,498 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:06:59,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 19:06:59,499 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:06:59,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:06:59,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1854167594, now seen corresponding path program 1 times [2020-10-23 19:06:59,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:06:59,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253101944] [2020-10-23 19:06:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:06:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:01,225 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:07:01,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:01,533 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 19:07:01,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253101944] [2020-10-23 19:07:01,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:01,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:07:01,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630740103] [2020-10-23 19:07:01,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:07:01,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:01,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:07:01,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:01,553 INFO L87 Difference]: Start difference. First operand 2511 states and 4318 transitions. Second operand 4 states. [2020-10-23 19:07:02,949 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-23 19:07:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:33,203 INFO L93 Difference]: Finished difference Result 6234 states and 10661 transitions. [2020-10-23 19:07:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:07:33,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 387 [2020-10-23 19:07:33,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:33,230 INFO L225 Difference]: With dead ends: 6234 [2020-10-23 19:07:33,230 INFO L226 Difference]: Without dead ends: 4315 [2020-10-23 19:07:33,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:07:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2020-10-23 19:07:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 4311. [2020-10-23 19:07:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4311 states. [2020-10-23 19:07:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4311 states to 4311 states and 7335 transitions. [2020-10-23 19:07:33,383 INFO L78 Accepts]: Start accepts. Automaton has 4311 states and 7335 transitions. Word has length 387 [2020-10-23 19:07:33,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:07:33,383 INFO L481 AbstractCegarLoop]: Abstraction has 4311 states and 7335 transitions. [2020-10-23 19:07:33,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:07:33,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4311 states and 7335 transitions. [2020-10-23 19:07:33,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-10-23 19:07:33,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:33,399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:33,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 19:07:33,399 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:33,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:33,400 INFO L82 PathProgramCache]: Analyzing trace with hash 763929495, now seen corresponding path program 1 times [2020-10-23 19:07:33,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:33,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278727857] [2020-10-23 19:07:33,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:34,829 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:07:34,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:35,082 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 19:07:35,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278727857] [2020-10-23 19:07:35,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:35,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:07:35,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017259963] [2020-10-23 19:07:35,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:07:35,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:35,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:07:35,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:35,086 INFO L87 Difference]: Start difference. First operand 4311 states and 7335 transitions. Second operand 4 states. [2020-10-23 19:07:36,427 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 443 [2020-10-23 19:08:07,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:08:07,488 INFO L93 Difference]: Finished difference Result 7280 states and 12408 transitions. [2020-10-23 19:08:07,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:08:07,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 392 [2020-10-23 19:08:07,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:08:07,516 INFO L225 Difference]: With dead ends: 7280 [2020-10-23 19:08:07,516 INFO L226 Difference]: Without dead ends: 5350 [2020-10-23 19:08:07,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:08:07,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5350 states. [2020-10-23 19:08:07,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5350 to 5346. [2020-10-23 19:08:07,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5346 states. [2020-10-23 19:08:07,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5346 states to 5346 states and 9098 transitions. [2020-10-23 19:08:07,717 INFO L78 Accepts]: Start accepts. Automaton has 5346 states and 9098 transitions. Word has length 392 [2020-10-23 19:08:07,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:08:07,718 INFO L481 AbstractCegarLoop]: Abstraction has 5346 states and 9098 transitions. [2020-10-23 19:08:07,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:08:07,718 INFO L276 IsEmpty]: Start isEmpty. Operand 5346 states and 9098 transitions. [2020-10-23 19:08:07,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-23 19:08:07,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:08:07,740 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:07,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 19:08:07,740 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:08:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:08:07,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1214711450, now seen corresponding path program 1 times [2020-10-23 19:08:07,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:08:07,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137342418] [2020-10-23 19:08:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:08:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:09,351 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:08:09,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:08:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:09,565 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 19:08:09,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137342418] [2020-10-23 19:08:09,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:08:09,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:08:09,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714492796] [2020-10-23 19:08:09,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:08:09,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:08:09,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:08:09,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:08:09,568 INFO L87 Difference]: Start difference. First operand 5346 states and 9098 transitions. Second operand 4 states. [2020-10-23 19:08:10,963 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-23 19:08:43,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:08:43,207 INFO L93 Difference]: Finished difference Result 14521 states and 24619 transitions. [2020-10-23 19:08:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:08:43,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-23 19:08:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:08:43,257 INFO L225 Difference]: With dead ends: 14521 [2020-10-23 19:08:43,257 INFO L226 Difference]: Without dead ends: 9795 [2020-10-23 19:08:43,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:08:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9795 states. [2020-10-23 19:08:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9795 to 9791. [2020-10-23 19:08:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9791 states. [2020-10-23 19:08:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9791 states to 9791 states and 16578 transitions. [2020-10-23 19:08:43,594 INFO L78 Accepts]: Start accepts. Automaton has 9791 states and 16578 transitions. Word has length 396 [2020-10-23 19:08:43,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:08:43,594 INFO L481 AbstractCegarLoop]: Abstraction has 9791 states and 16578 transitions. [2020-10-23 19:08:43,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:08:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand 9791 states and 16578 transitions. [2020-10-23 19:08:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-10-23 19:08:43,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:08:43,620 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:43,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 19:08:43,620 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:08:43,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:08:43,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2097903769, now seen corresponding path program 1 times [2020-10-23 19:08:43,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:08:43,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109127949] [2020-10-23 19:08:43,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:08:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:45,194 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:08:45,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:08:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:45,448 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 19:08:45,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109127949] [2020-10-23 19:08:45,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:08:45,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:08:45,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653889652] [2020-10-23 19:08:45,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:08:45,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:08:45,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:08:45,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:08:45,451 INFO L87 Difference]: Start difference. First operand 9791 states and 16578 transitions. Second operand 4 states. [2020-10-23 19:08:46,905 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 443 [2020-10-23 19:09:18,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:09:18,776 INFO L93 Difference]: Finished difference Result 17611 states and 29840 transitions. [2020-10-23 19:09:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:09:18,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 401 [2020-10-23 19:09:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:09:18,824 INFO L225 Difference]: With dead ends: 17611 [2020-10-23 19:09:18,824 INFO L226 Difference]: Without dead ends: 12874 [2020-10-23 19:09:18,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:09:18,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12874 states. [2020-10-23 19:09:19,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12874 to 12870. [2020-10-23 19:09:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12870 states. [2020-10-23 19:09:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12870 states to 12870 states and 21780 transitions. [2020-10-23 19:09:19,211 INFO L78 Accepts]: Start accepts. Automaton has 12870 states and 21780 transitions. Word has length 401 [2020-10-23 19:09:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:09:19,212 INFO L481 AbstractCegarLoop]: Abstraction has 12870 states and 21780 transitions. [2020-10-23 19:09:19,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:09:19,212 INFO L276 IsEmpty]: Start isEmpty. Operand 12870 states and 21780 transitions. [2020-10-23 19:09:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2020-10-23 19:09:19,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:09:19,242 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:09:19,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 19:09:19,243 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:09:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:09:19,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1153187966, now seen corresponding path program 1 times [2020-10-23 19:09:19,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:09:19,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672960538] [2020-10-23 19:09:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:09:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:09:20,882 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:09:20,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:09:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:09:21,080 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 19:09:21,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672960538] [2020-10-23 19:09:21,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:09:21,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:09:21,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748286477] [2020-10-23 19:09:21,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:09:21,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:09:21,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:09:21,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:09:21,083 INFO L87 Difference]: Start difference. First operand 12870 states and 21780 transitions. Second operand 4 states. [2020-10-23 19:09:22,530 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-23 19:09:55,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:09:55,340 INFO L93 Difference]: Finished difference Result 36509 states and 61609 transitions. [2020-10-23 19:09:55,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:09:55,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 405 [2020-10-23 19:09:55,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:09:55,396 INFO L225 Difference]: With dead ends: 36509 [2020-10-23 19:09:55,396 INFO L226 Difference]: Without dead ends: 24287 [2020-10-23 19:09:55,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:09:55,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24287 states. [2020-10-23 19:09:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24287 to 24283. [2020-10-23 19:09:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24283 states. [2020-10-23 19:09:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24283 states to 24283 states and 40886 transitions. [2020-10-23 19:09:56,145 INFO L78 Accepts]: Start accepts. Automaton has 24283 states and 40886 transitions. Word has length 405 [2020-10-23 19:09:56,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:09:56,146 INFO L481 AbstractCegarLoop]: Abstraction has 24283 states and 40886 transitions. [2020-10-23 19:09:56,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:09:56,146 INFO L276 IsEmpty]: Start isEmpty. Operand 24283 states and 40886 transitions. [2020-10-23 19:09:56,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-10-23 19:09:56,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:09:56,185 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:09:56,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 19:09:56,185 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:09:56,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:09:56,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1343322057, now seen corresponding path program 1 times [2020-10-23 19:09:56,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:09:56,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925127423] [2020-10-23 19:09:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:09:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:09:57,872 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:09:57,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:09:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:09:58,054 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 19:09:58,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925127423] [2020-10-23 19:09:58,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:09:58,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:09:58,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108486014] [2020-10-23 19:09:58,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:09:58,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:09:58,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:09:58,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:09:58,057 INFO L87 Difference]: Start difference. First operand 24283 states and 40886 transitions. Second operand 4 states. [2020-10-23 19:09:59,541 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 443 [2020-10-23 19:10:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:10:31,257 INFO L93 Difference]: Finished difference Result 44887 states and 75678 transitions. [2020-10-23 19:10:31,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:10:31,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 410 [2020-10-23 19:10:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:10:31,334 INFO L225 Difference]: With dead ends: 44887 [2020-10-23 19:10:31,334 INFO L226 Difference]: Without dead ends: 32654 [2020-10-23 19:10:31,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:10:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32654 states. [2020-10-23 19:10:32,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32654 to 32650. [2020-10-23 19:10:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32650 states. [2020-10-23 19:10:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32650 states to 32650 states and 54938 transitions. [2020-10-23 19:10:32,308 INFO L78 Accepts]: Start accepts. Automaton has 32650 states and 54938 transitions. Word has length 410 [2020-10-23 19:10:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:10:32,309 INFO L481 AbstractCegarLoop]: Abstraction has 32650 states and 54938 transitions. [2020-10-23 19:10:32,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:10:32,309 INFO L276 IsEmpty]: Start isEmpty. Operand 32650 states and 54938 transitions. [2020-10-23 19:10:32,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2020-10-23 19:10:32,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:10:32,357 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:10:32,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 19:10:32,357 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:10:32,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:10:32,358 INFO L82 PathProgramCache]: Analyzing trace with hash 972981610, now seen corresponding path program 1 times [2020-10-23 19:10:32,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:10:32,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151676029] [2020-10-23 19:10:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:10:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:10:33,936 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:10:33,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:10:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:10:34,271 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 19:10:34,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151676029] [2020-10-23 19:10:34,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:10:34,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:10:34,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542475490] [2020-10-23 19:10:34,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:10:34,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:10:34,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:10:34,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:10:34,288 INFO L87 Difference]: Start difference. First operand 32650 states and 54938 transitions. Second operand 4 states. [2020-10-23 19:10:35,662 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-23 19:11:07,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:11:07,405 INFO L93 Difference]: Finished difference Result 94233 states and 158135 transitions. [2020-10-23 19:11:07,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:11:07,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 414 [2020-10-23 19:11:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:11:07,534 INFO L225 Difference]: With dead ends: 94233 [2020-10-23 19:11:07,534 INFO L226 Difference]: Without dead ends: 62259 [2020-10-23 19:11:07,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:11:07,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62259 states. [2020-10-23 19:11:09,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62259 to 62255. [2020-10-23 19:11:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62255 states. [2020-10-23 19:11:09,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62255 states to 62255 states and 104168 transitions. [2020-10-23 19:11:09,444 INFO L78 Accepts]: Start accepts. Automaton has 62255 states and 104168 transitions. Word has length 414 [2020-10-23 19:11:09,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:11:09,445 INFO L481 AbstractCegarLoop]: Abstraction has 62255 states and 104168 transitions. [2020-10-23 19:11:09,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:11:09,445 INFO L276 IsEmpty]: Start isEmpty. Operand 62255 states and 104168 transitions. [2020-10-23 19:11:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-10-23 19:11:09,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:11:09,513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:09,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 19:11:09,513 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:11:09,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:11:09,514 INFO L82 PathProgramCache]: Analyzing trace with hash -743767657, now seen corresponding path program 1 times [2020-10-23 19:11:09,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:11:09,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413428985] [2020-10-23 19:11:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:11:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:11:11,585 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:11:11,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:11:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:11:11,849 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 19:11:11,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413428985] [2020-10-23 19:11:11,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:11:11,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:11:11,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641292635] [2020-10-23 19:11:11,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:11:11,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:11:11,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:11:11,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:11:11,852 INFO L87 Difference]: Start difference. First operand 62255 states and 104168 transitions. Second operand 4 states. [2020-10-23 19:11:13,392 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 443 [2020-10-23 19:11:45,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:11:45,178 INFO L93 Difference]: Finished difference Result 116011 states and 194412 transitions. [2020-10-23 19:11:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:11:45,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 419 [2020-10-23 19:11:45,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:11:45,307 INFO L225 Difference]: With dead ends: 116011 [2020-10-23 19:11:45,307 INFO L226 Difference]: Without dead ends: 84026 [2020-10-23 19:11:45,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:11:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84026 states. [2020-10-23 19:11:47,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84026 to 84022. [2020-10-23 19:11:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84022 states. [2020-10-23 19:11:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84022 states to 84022 states and 140432 transitions. [2020-10-23 19:11:48,219 INFO L78 Accepts]: Start accepts. Automaton has 84022 states and 140432 transitions. Word has length 419 [2020-10-23 19:11:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:11:48,219 INFO L481 AbstractCegarLoop]: Abstraction has 84022 states and 140432 transitions. [2020-10-23 19:11:48,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:11:48,220 INFO L276 IsEmpty]: Start isEmpty. Operand 84022 states and 140432 transitions. [2020-10-23 19:11:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-10-23 19:11:48,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:11:48,327 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:48,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 19:11:48,328 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:11:48,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:11:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1845205966, now seen corresponding path program 1 times [2020-10-23 19:11:48,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:11:48,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688709674] [2020-10-23 19:11:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:11:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:11:50,293 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:11:50,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:11:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:11:50,601 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 19:11:50,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688709674] [2020-10-23 19:11:50,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:11:50,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:11:50,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452380227] [2020-10-23 19:11:50,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:11:50,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:11:50,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:11:50,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:11:50,603 INFO L87 Difference]: Start difference. First operand 84022 states and 140432 transitions. Second operand 4 states. [2020-10-23 19:11:52,077 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-23 19:12:25,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:12:25,951 INFO L93 Difference]: Finished difference Result 243661 states and 406037 transitions. [2020-10-23 19:12:25,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:12:25,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 423 [2020-10-23 19:12:25,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:12:26,309 INFO L225 Difference]: With dead ends: 243661 [2020-10-23 19:12:26,309 INFO L226 Difference]: Without dead ends: 160343 [2020-10-23 19:12:26,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:12:26,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160343 states. [2020-10-23 19:12:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160343 to 160339. [2020-10-23 19:12:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160339 states. [2020-10-23 19:12:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160339 states to 160339 states and 266234 transitions. [2020-10-23 19:12:30,766 INFO L78 Accepts]: Start accepts. Automaton has 160339 states and 266234 transitions. Word has length 423 [2020-10-23 19:12:30,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:12:30,767 INFO L481 AbstractCegarLoop]: Abstraction has 160339 states and 266234 transitions. [2020-10-23 19:12:30,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:12:30,767 INFO L276 IsEmpty]: Start isEmpty. Operand 160339 states and 266234 transitions. [2020-10-23 19:12:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-10-23 19:12:31,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:12:31,196 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:31,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 19:12:31,196 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:12:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:12:31,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1447502897, now seen corresponding path program 1 times [2020-10-23 19:12:31,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:12:31,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351461037] [2020-10-23 19:12:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:12:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:12:33,093 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:12:33,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:12:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:12:33,281 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 19:12:33,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351461037] [2020-10-23 19:12:33,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:12:33,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:12:33,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309806498] [2020-10-23 19:12:33,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:12:33,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:12:33,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:12:33,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:12:33,284 INFO L87 Difference]: Start difference. First operand 160339 states and 266234 transitions. Second operand 4 states. [2020-10-23 19:12:34,767 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 443 [2020-10-23 19:13:08,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:13:08,708 INFO L93 Difference]: Finished difference Result 298271 states and 495974 transitions. [2020-10-23 19:13:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:13:08,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 428 [2020-10-23 19:13:08,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:13:09,189 INFO L225 Difference]: With dead ends: 298271 [2020-10-23 19:13:09,189 INFO L226 Difference]: Without dead ends: 214942 [2020-10-23 19:13:09,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:13:09,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214942 states. [2020-10-23 19:13:16,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214942 to 214938. [2020-10-23 19:13:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214938 states. [2020-10-23 19:13:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214938 states to 214938 states and 356166 transitions. [2020-10-23 19:13:17,157 INFO L78 Accepts]: Start accepts. Automaton has 214938 states and 356166 transitions. Word has length 428 [2020-10-23 19:13:17,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:13:17,158 INFO L481 AbstractCegarLoop]: Abstraction has 214938 states and 356166 transitions. [2020-10-23 19:13:17,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:13:17,158 INFO L276 IsEmpty]: Start isEmpty. Operand 214938 states and 356166 transitions. [2020-10-23 19:13:17,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-10-23 19:13:17,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:13:17,631 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:13:17,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 19:13:17,631 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:13:17,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:13:17,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1789050142, now seen corresponding path program 1 times [2020-10-23 19:13:17,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:13:17,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4916351] [2020-10-23 19:13:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:13:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:13:19,441 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:13:19,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:13:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:13:19,717 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 19:13:19,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4916351] [2020-10-23 19:13:19,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:13:19,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 19:13:19,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822768724] [2020-10-23 19:13:19,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 19:13:19,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:13:19,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 19:13:19,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-23 19:13:19,720 INFO L87 Difference]: Start difference. First operand 214938 states and 356166 transitions. Second operand 8 states. [2020-10-23 19:13:21,210 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 447 [2020-10-23 19:14:42,057 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-23 19:14:43,824 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 442 [2020-10-23 19:14:45,471 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 446 [2020-10-23 19:14:47,230 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification that was a NOOP. DAG size: 444 [2020-10-23 19:15:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:15:08,764 INFO L93 Difference]: Finished difference Result 1123724 states and 1865909 transitions. [2020-10-23 19:15:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 19:15:08,766 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 432 [2020-10-23 19:15:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:15:10,779 INFO L225 Difference]: With dead ends: 1123724 [2020-10-23 19:15:10,779 INFO L226 Difference]: Without dead ends: 909492 [2020-10-23 19:15:11,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-10-23 19:15:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909492 states. [2020-10-23 19:15:34,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909492 to 427813. [2020-10-23 19:15:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427813 states. [2020-10-23 19:15:35,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427813 states to 427813 states and 706032 transitions. [2020-10-23 19:15:35,410 INFO L78 Accepts]: Start accepts. Automaton has 427813 states and 706032 transitions. Word has length 432 [2020-10-23 19:15:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:15:35,411 INFO L481 AbstractCegarLoop]: Abstraction has 427813 states and 706032 transitions. [2020-10-23 19:15:35,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 19:15:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 427813 states and 706032 transitions. [2020-10-23 19:15:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-10-23 19:15:36,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:15:36,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:15:36,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 19:15:36,275 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:15:36,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:15:36,276 INFO L82 PathProgramCache]: Analyzing trace with hash -594172234, now seen corresponding path program 1 times [2020-10-23 19:15:36,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:15:36,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693893117] [2020-10-23 19:15:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:15:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:15:38,165 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:15:38,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:15:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:15:38,439 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 19:15:38,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693893117] [2020-10-23 19:15:38,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:15:38,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:15:38,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635570712] [2020-10-23 19:15:38,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:15:38,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:15:38,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:15:38,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:15:38,443 INFO L87 Difference]: Start difference. First operand 427813 states and 706032 transitions. Second operand 5 states. [2020-10-23 19:15:40,075 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification that was a NOOP. DAG size: 442 [2020-10-23 19:16:33,853 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-23 19:16:53,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:16:53,738 INFO L93 Difference]: Finished difference Result 1272473 states and 2107271 transitions. [2020-10-23 19:16:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 19:16:53,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 434 [2020-10-23 19:16:53,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:16:55,539 INFO L225 Difference]: With dead ends: 1272473 [2020-10-23 19:16:55,540 INFO L226 Difference]: Without dead ends: 845366 [2020-10-23 19:16:56,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:16:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845366 states.