/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:44:09,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:44:09,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:44:09,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:44:09,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:44:09,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:44:09,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:44:09,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:44:09,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:44:09,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:44:09,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:44:09,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:44:09,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:44:09,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:44:09,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:44:09,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:44:09,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:44:09,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:44:09,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:44:09,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:44:09,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:44:09,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:44:09,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:44:09,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:44:09,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:44:09,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:44:09,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:44:09,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:44:09,485 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:44:09,511 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:44:09,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:44:09,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:44:09,517 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:44:09,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:44:09,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:44:09,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:44:09,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:44:09,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:44:09,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:44:09,519 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:44:09,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:44:09,520 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:44:09,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:44:09,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:44:09,521 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:44:09,521 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:44:09,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:44:09,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:44:09,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:44:09,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:44:09,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:44:09,523 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:44:09,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:44:09,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:44:09,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:44:09,929 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:44:09,930 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:44:09,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-21 21:44:10,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce312221d/2a6ef3df74cc4df8a89684da10689b6e/FLAG96bd2a48c [2021-02-21 21:44:10,820 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:44:10,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-21 21:44:10,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce312221d/2a6ef3df74cc4df8a89684da10689b6e/FLAG96bd2a48c [2021-02-21 21:44:11,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce312221d/2a6ef3df74cc4df8a89684da10689b6e [2021-02-21 21:44:11,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:44:11,110 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:44:11,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:44:11,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:44:11,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:44:11,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:44:11" (1/1) ... [2021-02-21 21:44:11,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a61acde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:44:11, skipping insertion in model container [2021-02-21 21:44:11,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:44:11" (1/1) ... [2021-02-21 21:44:11,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:44:11,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:44:11,623 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[13847,13860] [2021-02-21 21:44:11,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:44:11,781 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:44:11,995 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[13847,13860] [2021-02-21 21:44:12,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:44:12,109 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:44:12,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:44:12 WrapperNode [2021-02-21 21:44:12,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:44:12,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:44:12,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:44:12,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:44:12,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:44:12" (1/1) ... [2021-02-21 21:44:12,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:44:12" (1/1) ... [2021-02-21 21:44:12,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:44:12" (1/1) ... [2021-02-21 21:44:12,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:44:12" (1/1) ... [2021-02-21 21:44:12,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:44:12" (1/1) ... [2021-02-21 21:44:12,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:44:12" (1/1) ... [2021-02-21 21:44:12,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:44:12" (1/1) ... [2021-02-21 21:44:12,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:44:12,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:44:12,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:44:12,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:44:12,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:44:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:44:12,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:44:12,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:44:12,352 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:44:12,352 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:44:12,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:44:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:44:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:44:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:44:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:44:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-21 21:44:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-02-21 21:44:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-21 21:44:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-21 21:44:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:44:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-21 21:44:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-21 21:44:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-21 21:44:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-21 21:44:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-21 21:44:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-21 21:44:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-21 21:44:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:44:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:44:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:44:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:44:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:44:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:44:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:44:14,063 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:44:14,063 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 21:44:14,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:44:14 BoogieIcfgContainer [2021-02-21 21:44:14,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:44:14,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:44:14,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:44:14,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:44:14,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:44:11" (1/3) ... [2021-02-21 21:44:14,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290ee5c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:44:14, skipping insertion in model container [2021-02-21 21:44:14,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:44:12" (2/3) ... [2021-02-21 21:44:14,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290ee5c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:44:14, skipping insertion in model container [2021-02-21 21:44:14,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:44:14" (3/3) ... [2021-02-21 21:44:14,077 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-21 21:44:14,085 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:44:14,092 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:44:14,113 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:44:14,141 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:44:14,141 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:44:14,141 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:44:14,142 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:44:14,142 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:44:14,142 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:44:14,142 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:44:14,142 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:44:14,176 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states. [2021-02-21 21:44:14,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2021-02-21 21:44:14,212 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:44:14,214 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] [2021-02-21 21:44:14,214 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:44:14,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:44:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash -153729234, now seen corresponding path program 1 times [2021-02-21 21:44:14,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:44:14,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488381496] [2021-02-21 21:44:14,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:44:14,316 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:44:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:15,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:15,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:15,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:15,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:44:15,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:15,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:44:15,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:15,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:15,499 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-21 21:44:15,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:44:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:15,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:15,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:44:16,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488381496] [2021-02-21 21:44:16,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:44:16,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:44:16,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518902202] [2021-02-21 21:44:16,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:44:16,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:44:16,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:44:16,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:44:16,085 INFO L87 Difference]: Start difference. First operand 821 states. Second operand 5 states. [2021-02-21 21:44:21,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:44:21,530 INFO L93 Difference]: Finished difference Result 2074 states and 2757 transitions. [2021-02-21 21:44:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 21:44:21,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 415 [2021-02-21 21:44:21,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:44:21,568 INFO L225 Difference]: With dead ends: 2074 [2021-02-21 21:44:21,569 INFO L226 Difference]: Without dead ends: 1244 [2021-02-21 21:44:21,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:44:21,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-02-21 21:44:21,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1242. [2021-02-21 21:44:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1242 states. [2021-02-21 21:44:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1510 transitions. [2021-02-21 21:44:21,798 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1510 transitions. Word has length 415 [2021-02-21 21:44:21,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:44:21,800 INFO L480 AbstractCegarLoop]: Abstraction has 1242 states and 1510 transitions. [2021-02-21 21:44:21,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:44:21,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1510 transitions. [2021-02-21 21:44:21,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2021-02-21 21:44:21,810 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:44:21,811 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] [2021-02-21 21:44:21,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:44:21,811 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:44:21,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:44:21,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1130536267, now seen corresponding path program 1 times [2021-02-21 21:44:21,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:44:21,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688513088] [2021-02-21 21:44:21,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:44:21,818 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:44:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:21,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:21,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:21,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:21,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:44:21,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:21,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:22,274 WARN L202 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-21 21:44:22,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:44:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:22,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:22,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:44:22,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688513088] [2021-02-21 21:44:22,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:44:22,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:44:22,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49078536] [2021-02-21 21:44:22,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:44:22,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:44:22,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:44:22,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:44:22,492 INFO L87 Difference]: Start difference. First operand 1242 states and 1510 transitions. Second operand 4 states. [2021-02-21 21:44:26,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:44:26,834 INFO L93 Difference]: Finished difference Result 3331 states and 4111 transitions. [2021-02-21 21:44:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:44:26,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 416 [2021-02-21 21:44:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:44:26,854 INFO L225 Difference]: With dead ends: 3331 [2021-02-21 21:44:26,856 INFO L226 Difference]: Without dead ends: 2302 [2021-02-21 21:44:26,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:44:26,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-02-21 21:44:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1244. [2021-02-21 21:44:26,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1244 states. [2021-02-21 21:44:26,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1512 transitions. [2021-02-21 21:44:26,991 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1512 transitions. Word has length 416 [2021-02-21 21:44:26,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:44:26,992 INFO L480 AbstractCegarLoop]: Abstraction has 1244 states and 1512 transitions. [2021-02-21 21:44:26,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:44:26,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1512 transitions. [2021-02-21 21:44:27,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-02-21 21:44:27,000 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:44:27,001 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] [2021-02-21 21:44:27,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:44:27,002 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:44:27,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:44:27,002 INFO L82 PathProgramCache]: Analyzing trace with hash -118669967, now seen corresponding path program 1 times [2021-02-21 21:44:27,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:44:27,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739080835] [2021-02-21 21:44:27,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:44:27,007 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:44:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:27,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:27,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:27,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:27,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:44:27,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:27,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:27,468 WARN L202 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-21 21:44:27,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:44:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:27,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:27,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:44:27,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739080835] [2021-02-21 21:44:27,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:44:27,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:44:27,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276678093] [2021-02-21 21:44:27,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:44:27,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:44:27,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:44:27,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:44:27,747 INFO L87 Difference]: Start difference. First operand 1244 states and 1512 transitions. Second operand 4 states. [2021-02-21 21:44:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:44:31,936 INFO L93 Difference]: Finished difference Result 3074 states and 3793 transitions. [2021-02-21 21:44:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:44:31,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 417 [2021-02-21 21:44:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:44:31,948 INFO L225 Difference]: With dead ends: 3074 [2021-02-21 21:44:31,949 INFO L226 Difference]: Without dead ends: 2250 [2021-02-21 21:44:31,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:44:31,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2021-02-21 21:44:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2248. [2021-02-21 21:44:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2248 states. [2021-02-21 21:44:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 2751 transitions. [2021-02-21 21:44:32,181 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 2751 transitions. Word has length 417 [2021-02-21 21:44:32,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:44:32,182 INFO L480 AbstractCegarLoop]: Abstraction has 2248 states and 2751 transitions. [2021-02-21 21:44:32,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:44:32,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 2751 transitions. [2021-02-21 21:44:32,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-02-21 21:44:32,198 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:44:32,199 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] [2021-02-21 21:44:32,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:44:32,199 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:44:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:44:32,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1775911439, now seen corresponding path program 1 times [2021-02-21 21:44:32,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:44:32,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106641087] [2021-02-21 21:44:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:44:32,210 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:44:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:32,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:32,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:32,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:32,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:44:32,502 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-21 21:44:32,504 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-21 21:44:32,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:32,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:44:32,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:32,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:32,819 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-21 21:44:32,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:44:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:32,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:32,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:44:33,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106641087] [2021-02-21 21:44:33,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:44:33,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:44:33,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377141801] [2021-02-21 21:44:33,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:44:33,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:44:33,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:44:33,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:44:33,101 INFO L87 Difference]: Start difference. First operand 2248 states and 2751 transitions. Second operand 6 states. [2021-02-21 21:44:37,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:44:37,465 INFO L93 Difference]: Finished difference Result 5996 states and 7394 transitions. [2021-02-21 21:44:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:44:37,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 417 [2021-02-21 21:44:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:44:37,495 INFO L225 Difference]: With dead ends: 5996 [2021-02-21 21:44:37,495 INFO L226 Difference]: Without dead ends: 3932 [2021-02-21 21:44:37,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:44:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2021-02-21 21:44:37,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 3930. [2021-02-21 21:44:37,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3930 states. [2021-02-21 21:44:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3930 states to 3930 states and 4803 transitions. [2021-02-21 21:44:37,863 INFO L78 Accepts]: Start accepts. Automaton has 3930 states and 4803 transitions. Word has length 417 [2021-02-21 21:44:37,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:44:37,864 INFO L480 AbstractCegarLoop]: Abstraction has 3930 states and 4803 transitions. [2021-02-21 21:44:37,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:44:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3930 states and 4803 transitions. [2021-02-21 21:44:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-02-21 21:44:37,877 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:44:37,878 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] [2021-02-21 21:44:37,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:44:37,878 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:44:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:44:37,879 INFO L82 PathProgramCache]: Analyzing trace with hash 737743196, now seen corresponding path program 1 times [2021-02-21 21:44:37,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:44:37,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736529132] [2021-02-21 21:44:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:44:37,886 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:44:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:38,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:38,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:38,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:38,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:44:38,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:38,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:44:38,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:38,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:38,527 WARN L202 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-21 21:44:38,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:44:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:38,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:38,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:44:38,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736529132] [2021-02-21 21:44:38,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:44:38,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:44:38,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864964927] [2021-02-21 21:44:38,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:44:38,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:44:38,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:44:38,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:44:38,753 INFO L87 Difference]: Start difference. First operand 3930 states and 4803 transitions. Second operand 5 states. [2021-02-21 21:44:43,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:44:43,185 INFO L93 Difference]: Finished difference Result 11049 states and 13544 transitions. [2021-02-21 21:44:43,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:44:43,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 417 [2021-02-21 21:44:43,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:44:43,218 INFO L225 Difference]: With dead ends: 11049 [2021-02-21 21:44:43,219 INFO L226 Difference]: Without dead ends: 7378 [2021-02-21 21:44:43,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:44:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-02-21 21:44:44,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 7376. [2021-02-21 21:44:44,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7376 states. [2021-02-21 21:44:44,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 8976 transitions. [2021-02-21 21:44:44,086 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 8976 transitions. Word has length 417 [2021-02-21 21:44:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:44:44,087 INFO L480 AbstractCegarLoop]: Abstraction has 7376 states and 8976 transitions. [2021-02-21 21:44:44,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:44:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 8976 transitions. [2021-02-21 21:44:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2021-02-21 21:44:44,101 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:44:44,102 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] [2021-02-21 21:44:44,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:44:44,102 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:44:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:44:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash 902525339, now seen corresponding path program 1 times [2021-02-21 21:44:44,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:44:44,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805816527] [2021-02-21 21:44:44,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:44:44,112 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:44:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:44,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:44,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:44,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:44,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:44:44,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:44,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:44,547 WARN L202 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-21 21:44:44,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:44:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:44,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:44,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:44:44,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805816527] [2021-02-21 21:44:44,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:44:44,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:44:44,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985647626] [2021-02-21 21:44:44,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:44:44,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:44:44,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:44:44,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:44:44,770 INFO L87 Difference]: Start difference. First operand 7376 states and 8976 transitions. Second operand 4 states. [2021-02-21 21:44:49,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:44:49,763 INFO L93 Difference]: Finished difference Result 21545 states and 26264 transitions. [2021-02-21 21:44:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:44:49,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2021-02-21 21:44:49,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:44:49,826 INFO L225 Difference]: With dead ends: 21545 [2021-02-21 21:44:49,827 INFO L226 Difference]: Without dead ends: 14478 [2021-02-21 21:44:49,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:44:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14478 states. [2021-02-21 21:44:50,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14478 to 7386. [2021-02-21 21:44:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7386 states. [2021-02-21 21:44:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7386 states to 7386 states and 8986 transitions. [2021-02-21 21:44:50,788 INFO L78 Accepts]: Start accepts. Automaton has 7386 states and 8986 transitions. Word has length 418 [2021-02-21 21:44:50,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:44:50,788 INFO L480 AbstractCegarLoop]: Abstraction has 7386 states and 8986 transitions. [2021-02-21 21:44:50,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:44:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 7386 states and 8986 transitions. [2021-02-21 21:44:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-02-21 21:44:50,802 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:44:50,802 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] [2021-02-21 21:44:50,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:44:50,803 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:44:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:44:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash -420860065, now seen corresponding path program 1 times [2021-02-21 21:44:50,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:44:50,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121471109] [2021-02-21 21:44:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:44:50,807 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:44:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:50,900 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:50,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:50,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:50,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:44:50,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:50,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:51,214 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-21 21:44:51,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:44:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:51,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:51,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:44:51,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121471109] [2021-02-21 21:44:51,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:44:51,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:44:51,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633389031] [2021-02-21 21:44:51,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:44:51,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:44:51,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:44:51,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:44:51,410 INFO L87 Difference]: Start difference. First operand 7386 states and 8986 transitions. Second operand 4 states. [2021-02-21 21:44:56,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:44:56,579 INFO L93 Difference]: Finished difference Result 20119 states and 24540 transitions. [2021-02-21 21:44:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:44:56,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 419 [2021-02-21 21:44:56,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:44:56,611 INFO L225 Difference]: With dead ends: 20119 [2021-02-21 21:44:56,612 INFO L226 Difference]: Without dead ends: 14057 [2021-02-21 21:44:56,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:44:56,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14057 states. [2021-02-21 21:44:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14057 to 14055. [2021-02-21 21:44:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14055 states. [2021-02-21 21:44:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14055 states to 14055 states and 17002 transitions. [2021-02-21 21:44:57,949 INFO L78 Accepts]: Start accepts. Automaton has 14055 states and 17002 transitions. Word has length 419 [2021-02-21 21:44:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:44:57,949 INFO L480 AbstractCegarLoop]: Abstraction has 14055 states and 17002 transitions. [2021-02-21 21:44:57,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:44:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 14055 states and 17002 transitions. [2021-02-21 21:44:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-02-21 21:44:57,973 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:44:57,973 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] [2021-02-21 21:44:57,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:44:57,974 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:44:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:44:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash -156430369, now seen corresponding path program 1 times [2021-02-21 21:44:57,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:44:57,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349761966] [2021-02-21 21:44:57,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:44:57,982 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:44:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:58,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:58,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:58,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:58,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:44:58,183 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-21 21:44:58,185 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-21 21:44:58,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:58,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:44:58,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:58,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:58,553 WARN L202 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-21 21:44:58,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:44:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:58,581 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:58,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:44:58,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349761966] [2021-02-21 21:44:58,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:44:58,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:44:58,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771729172] [2021-02-21 21:44:58,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:44:58,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:44:58,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:44:58,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:44:58,752 INFO L87 Difference]: Start difference. First operand 14055 states and 17002 transitions. Second operand 6 states. [2021-02-21 21:45:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:45:05,039 INFO L93 Difference]: Finished difference Result 39709 states and 48059 transitions. [2021-02-21 21:45:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:45:05,039 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 419 [2021-02-21 21:45:05,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:45:05,091 INFO L225 Difference]: With dead ends: 39709 [2021-02-21 21:45:05,091 INFO L226 Difference]: Without dead ends: 25939 [2021-02-21 21:45:05,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:45:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25939 states. [2021-02-21 21:45:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25939 to 25937. [2021-02-21 21:45:07,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25937 states. [2021-02-21 21:45:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25937 states to 25937 states and 31181 transitions. [2021-02-21 21:45:07,991 INFO L78 Accepts]: Start accepts. Automaton has 25937 states and 31181 transitions. Word has length 419 [2021-02-21 21:45:07,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:45:07,991 INFO L480 AbstractCegarLoop]: Abstraction has 25937 states and 31181 transitions. [2021-02-21 21:45:07,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:45:07,992 INFO L276 IsEmpty]: Start isEmpty. Operand 25937 states and 31181 transitions. [2021-02-21 21:45:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-02-21 21:45:08,025 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:45:08,026 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] [2021-02-21 21:45:08,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 21:45:08,026 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:45:08,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:45:08,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1584665826, now seen corresponding path program 1 times [2021-02-21 21:45:08,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:45:08,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636030234] [2021-02-21 21:45:08,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:45:08,030 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:45:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:45:08,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:08,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:08,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:08,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:45:08,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:08,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:45:08,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:08,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:08,490 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-21 21:45:08,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:45:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:45:08,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:08,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:45:08,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636030234] [2021-02-21 21:45:08,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:45:08,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:45:08,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101546723] [2021-02-21 21:45:08,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:45:08,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:45:08,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:45:08,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:45:08,699 INFO L87 Difference]: Start difference. First operand 25937 states and 31181 transitions. Second operand 5 states. [2021-02-21 21:45:15,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:45:15,442 INFO L93 Difference]: Finished difference Result 52196 states and 62712 transitions. [2021-02-21 21:45:15,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:45:15,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 419 [2021-02-21 21:45:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:45:15,491 INFO L225 Difference]: With dead ends: 52196 [2021-02-21 21:45:15,491 INFO L226 Difference]: Without dead ends: 27021 [2021-02-21 21:45:15,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:45:15,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27021 states. [2021-02-21 21:45:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27021 to 26491. [2021-02-21 21:45:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26491 states. [2021-02-21 21:45:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26491 states to 26491 states and 31782 transitions. [2021-02-21 21:45:18,350 INFO L78 Accepts]: Start accepts. Automaton has 26491 states and 31782 transitions. Word has length 419 [2021-02-21 21:45:18,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:45:18,351 INFO L480 AbstractCegarLoop]: Abstraction has 26491 states and 31782 transitions. [2021-02-21 21:45:18,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:45:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 26491 states and 31782 transitions. [2021-02-21 21:45:18,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-02-21 21:45:18,386 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:45:18,386 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] [2021-02-21 21:45:18,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 21:45:18,387 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:45:18,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:45:18,387 INFO L82 PathProgramCache]: Analyzing trace with hash -511422423, now seen corresponding path program 1 times [2021-02-21 21:45:18,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:45:18,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798020681] [2021-02-21 21:45:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:45:18,391 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:45:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:45:18,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:18,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:18,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:18,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:45:18,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:18,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:18,776 WARN L202 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-21 21:45:18,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:45:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:45:18,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:18,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:45:19,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798020681] [2021-02-21 21:45:19,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:45:19,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:45:19,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359109034] [2021-02-21 21:45:19,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:45:19,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:45:19,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:45:19,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:45:19,106 INFO L87 Difference]: Start difference. First operand 26491 states and 31782 transitions. Second operand 4 states. [2021-02-21 21:45:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:45:28,456 INFO L93 Difference]: Finished difference Result 76427 states and 91860 transitions. [2021-02-21 21:45:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:45:28,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 420 [2021-02-21 21:45:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:45:28,527 INFO L225 Difference]: With dead ends: 76427 [2021-02-21 21:45:28,527 INFO L226 Difference]: Without dead ends: 52165 [2021-02-21 21:45:28,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:45:28,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52165 states. [2021-02-21 21:45:31,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52165 to 26531. [2021-02-21 21:45:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26531 states. [2021-02-21 21:45:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26531 states to 26531 states and 31822 transitions. [2021-02-21 21:45:31,826 INFO L78 Accepts]: Start accepts. Automaton has 26531 states and 31822 transitions. Word has length 420 [2021-02-21 21:45:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:45:31,826 INFO L480 AbstractCegarLoop]: Abstraction has 26531 states and 31822 transitions. [2021-02-21 21:45:31,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:45:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 26531 states and 31822 transitions. [2021-02-21 21:45:31,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-02-21 21:45:31,844 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:45:31,845 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] [2021-02-21 21:45:31,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 21:45:31,845 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:45:31,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:45:31,846 INFO L82 PathProgramCache]: Analyzing trace with hash 218944805, now seen corresponding path program 1 times [2021-02-21 21:45:31,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:45:31,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445797857] [2021-02-21 21:45:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:45:31,850 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:45:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:45:31,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:31,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:31,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:31,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:45:31,991 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-21 21:45:31,992 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-21 21:45:32,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:32,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:45:32,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:32,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:32,324 WARN L202 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-21 21:45:32,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:45:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:45:32,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:32,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:45:32,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445797857] [2021-02-21 21:45:32,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:45:32,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:45:32,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089358011] [2021-02-21 21:45:32,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:45:32,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:45:32,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:45:32,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:45:32,675 INFO L87 Difference]: Start difference. First operand 26531 states and 31822 transitions. Second operand 6 states. [2021-02-21 21:45:40,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:45:40,362 INFO L93 Difference]: Finished difference Result 54407 states and 65128 transitions. [2021-02-21 21:45:40,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:45:40,362 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 421 [2021-02-21 21:45:40,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:45:40,388 INFO L225 Difference]: With dead ends: 54407 [2021-02-21 21:45:40,389 INFO L226 Difference]: Without dead ends: 28505 [2021-02-21 21:45:40,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:45:40,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28505 states. [2021-02-21 21:45:43,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28505 to 27679. [2021-02-21 21:45:43,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27679 states. [2021-02-21 21:45:43,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27679 states to 27679 states and 33044 transitions. [2021-02-21 21:45:43,616 INFO L78 Accepts]: Start accepts. Automaton has 27679 states and 33044 transitions. Word has length 421 [2021-02-21 21:45:43,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:45:43,617 INFO L480 AbstractCegarLoop]: Abstraction has 27679 states and 33044 transitions. [2021-02-21 21:45:43,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:45:43,617 INFO L276 IsEmpty]: Start isEmpty. Operand 27679 states and 33044 transitions. [2021-02-21 21:45:43,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-02-21 21:45:43,643 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:45:43,644 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] [2021-02-21 21:45:43,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 21:45:43,644 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:45:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:45:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash -749240384, now seen corresponding path program 1 times [2021-02-21 21:45:43,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:45:43,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915996206] [2021-02-21 21:45:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:45:43,648 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:45:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:45:43,705 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:45:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:45:43,769 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:45:44,574 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 21:45:44,575 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 21:45:44,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 21:45:44,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:45:44 BoogieIcfgContainer [2021-02-21 21:45:44,670 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:45:44,677 INFO L168 Benchmark]: Toolchain (without parser) took 93574.36 ms. Allocated memory was 151.0 MB in the beginning and 3.7 GB in the end (delta: 3.6 GB). Free memory was 125.9 MB in the beginning and 2.5 GB in the end (delta: -2.4 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-02-21 21:45:44,678 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 125.4 MB in the end (delta: 115.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:45:44,679 INFO L168 Benchmark]: CACSL2BoogieTranslator took 994.79 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 127.0 MB in the end (delta: -2.4 MB). Peak memory consumption was 26.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:45:44,680 INFO L168 Benchmark]: Boogie Preprocessor took 139.40 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 123.4 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-02-21 21:45:44,684 INFO L168 Benchmark]: RCFGBuilder took 1814.46 ms. Allocated memory was 151.0 MB in the beginning and 192.9 MB in the end (delta: 41.9 MB). Free memory was 123.4 MB in the beginning and 138.7 MB in the end (delta: -15.3 MB). Peak memory consumption was 66.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:45:44,685 INFO L168 Benchmark]: TraceAbstraction took 90601.12 ms. Allocated memory was 192.9 MB in the beginning and 3.7 GB in the end (delta: 3.5 GB). Free memory was 138.2 MB in the beginning and 2.5 GB in the end (delta: -2.4 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-02-21 21:45:44,689 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 125.4 MB in the end (delta: 115.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 994.79 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 127.0 MB in the end (delta: -2.4 MB). Peak memory consumption was 26.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 139.40 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 123.4 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1814.46 ms. Allocated memory was 151.0 MB in the beginning and 192.9 MB in the end (delta: 41.9 MB). Free memory was 123.4 MB in the beginning and 138.7 MB in the end (delta: -15.3 MB). Peak memory consumption was 66.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 90601.12 ms. Allocated memory was 192.9 MB in the beginning and 3.7 GB in the end (delta: 3.5 GB). Free memory was 138.2 MB in the beginning and 2.5 GB in the end (delta: -2.4 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 834]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1] int __return_main; [L17] msg_t nomsg = (msg_t )-1; [L18] port_t p12 = 0; [L19] char p12_old = '\x0'; [L20] char p12_new = '\x0'; [L21] _Bool ep12 = 0; [L22] port_t p13 = 0; [L23] char p13_old = '\x0'; [L24] char p13_new = '\x0'; [L25] _Bool ep13 = 0; [L26] port_t p21 = 0; [L27] char p21_old = '\x0'; [L28] char p21_new = '\x0'; [L29] _Bool ep21 = 0; [L30] port_t p23 = 0; [L31] char p23_old = '\x0'; [L32] char p23_new = '\x0'; [L33] _Bool ep23 = 0; [L34] port_t p31 = 0; [L35] char p31_old = '\x0'; [L36] char p31_new = '\x0'; [L37] _Bool ep31 = 0; [L38] port_t p32 = 0; [L39] char p32_old = '\x0'; [L40] char p32_new = '\x0'; [L41] _Bool ep32 = 0; [L42] char id1 = '\x0'; [L43] unsigned char r1 = '\x0'; [L44] char st1 = '\x0'; [L45] char nl1 = '\x0'; [L46] char m1 = '\x0'; [L47] char max1 = '\x0'; [L48] _Bool mode1 = 0; [L49] char id2 = '\x0'; [L50] unsigned char r2 = '\x0'; [L51] char st2 = '\x0'; [L52] char nl2 = '\x0'; [L53] char m2 = '\x0'; [L54] char max2 = '\x0'; [L55] _Bool mode2 = 0; [L56] char id3 = '\x0'; [L57] unsigned char r3 = '\x0'; [L58] char st3 = '\x0'; [L59] char nl3 = '\x0'; [L60] char m3 = '\x0'; [L61] char max3 = '\x0'; [L62] _Bool mode3 = 0; [L66] void (*nodes[3])() = { &node1, &node2, &node3 }; [L70] int __return_1718; [L71] int __return_1846; [L72] int __return_1964; [L73] int __return_2082; [L74] int __return_2205; [L75] int __return_2315; [L78] int main__c1; [L79] int main__i2; [L80] main__c1 = 0 [L81] ep12 = __VERIFIER_nondet_bool() [L82] ep13 = __VERIFIER_nondet_bool() [L83] ep21 = __VERIFIER_nondet_bool() [L84] ep23 = __VERIFIER_nondet_bool() [L85] ep31 = __VERIFIER_nondet_bool() [L86] ep32 = __VERIFIER_nondet_bool() [L87] id1 = __VERIFIER_nondet_char() [L88] r1 = __VERIFIER_nondet_uchar() [L89] st1 = __VERIFIER_nondet_char() [L90] nl1 = __VERIFIER_nondet_char() [L91] m1 = __VERIFIER_nondet_char() [L92] max1 = __VERIFIER_nondet_char() [L93] mode1 = __VERIFIER_nondet_bool() [L94] id2 = __VERIFIER_nondet_char() [L95] r2 = __VERIFIER_nondet_uchar() [L96] st2 = __VERIFIER_nondet_char() [L97] nl2 = __VERIFIER_nondet_char() [L98] m2 = __VERIFIER_nondet_char() [L99] max2 = __VERIFIER_nondet_char() [L100] mode2 = __VERIFIER_nondet_bool() [L101] id3 = __VERIFIER_nondet_char() [L102] r3 = __VERIFIER_nondet_uchar() [L103] st3 = __VERIFIER_nondet_char() [L104] nl3 = __VERIFIER_nondet_char() [L105] m3 = __VERIFIER_nondet_char() [L106] max3 = __VERIFIER_nondet_char() [L107] mode3 = __VERIFIER_nondet_bool() [L109] _Bool init__r121; [L110] _Bool init__r131; [L111] _Bool init__r211; [L112] _Bool init__r231; [L113] _Bool init__r311; [L114] _Bool init__r321; [L115] _Bool init__r122; [L116] int init__tmp; [L117] _Bool init__r132; [L118] int init__tmp___0; [L119] _Bool init__r212; [L120] int init__tmp___1; [L121] _Bool init__r232; [L122] int init__tmp___2; [L123] _Bool init__r312; [L124] int init__tmp___3; [L125] _Bool init__r322; [L126] int init__tmp___4; [L127] int init__tmp___5; [L128] init__r121 = ep12 [L129] init__r131 = ep13 [L130] init__r211 = ep21 [L131] init__r231 = ep23 [L132] init__r311 = ep31 [L133] init__r321 = ep32 [L134] COND FALSE !(!(init__r121 == 0)) [L2246] COND FALSE !(!(init__r131 == 0)) [L2262] init__tmp = 0 [L138] init__r122 = (_Bool)init__tmp [L139] COND FALSE !(!(init__r131 == 0)) [L2223] COND FALSE !(!(init__r121 == 0)) [L2239] init__tmp___0 = 0 [L143] init__r132 = (_Bool)init__tmp___0 [L144] COND FALSE !(!(init__r211 == 0)) [L2200] COND FALSE !(!(init__r231 == 0)) [L2216] init__tmp___1 = 0 [L148] init__r212 = (_Bool)init__tmp___1 [L149] COND FALSE !(!(init__r231 == 0)) [L2177] COND FALSE !(!(init__r211 == 0)) [L2193] init__tmp___2 = 0 [L153] init__r232 = (_Bool)init__tmp___2 [L154] COND FALSE !(!(init__r311 == 0)) [L2154] COND FALSE !(!(init__r321 == 0)) [L2170] init__tmp___3 = 0 [L158] init__r312 = (_Bool)init__tmp___3 [L159] COND FALSE !(!(init__r321 == 0)) [L2131] COND FALSE !(!(init__r311 == 0)) [L2147] init__tmp___4 = 0 [L163] init__r322 = (_Bool)init__tmp___4 [L164] COND TRUE ((int)id1) != ((int)id2) [L166] COND TRUE ((int)id1) != ((int)id3) [L168] COND TRUE ((int)id2) != ((int)id3) [L170] COND TRUE ((int)id1) >= 0 [L172] COND TRUE ((int)id2) >= 0 [L174] COND TRUE ((int)id3) >= 0 [L176] COND TRUE ((int)r1) == 0 [L178] COND TRUE ((int)r2) == 0 [L180] COND TRUE ((int)r3) == 0 [L182] COND TRUE ((int)max1) == ((int)id1) [L184] COND TRUE ((int)max2) == ((int)id2) [L186] COND TRUE ((int)max3) == ((int)id3) [L188] COND TRUE ((int)st1) == 0 [L190] COND TRUE ((int)st2) == 0 [L192] COND TRUE ((int)st3) == 0 [L194] COND TRUE ((int)nl1) == 0 [L196] COND TRUE ((int)nl2) == 0 [L198] COND TRUE ((int)nl3) == 0 [L200] COND TRUE ((int)mode1) == 0 [L202] COND TRUE ((int)mode2) == 0 [L204] COND TRUE ((int)mode3) == 0 [L206] init__tmp___5 = 1 [L207] __return_1718 = init__tmp___5 [L208] main__i2 = __return_1718 [L209] COND TRUE main__i2 != 0 [L211] p12_old = nomsg [L212] p12_new = nomsg [L213] p13_old = nomsg [L214] p13_new = nomsg [L215] p21_old = nomsg [L216] p21_new = nomsg [L217] p23_old = nomsg [L218] p23_new = nomsg [L219] p31_old = nomsg [L220] p31_new = nomsg [L221] p32_old = nomsg [L222] p32_new = nomsg [L223] main__i2 = 0 [L225] COND FALSE !(!(mode1 == 0)) [L231] COND TRUE ((int)r1) < 2 [L233] COND FALSE !(!(ep12 == 0)) [L244] COND FALSE !(!(ep13 == 0)) [L255] mode1 = 1 [L257] COND FALSE !(!(mode2 == 0)) [L263] COND TRUE ((int)r2) < 2 [L265] COND FALSE !(!(ep21 == 0)) [L276] COND FALSE !(!(ep23 == 0)) [L287] mode2 = 1 [L289] COND FALSE !(!(mode3 == 0)) [L295] COND TRUE ((int)r3) < 2 [L297] COND FALSE !(!(ep31 == 0)) [L308] COND FALSE !(!(ep32 == 0)) [L319] mode3 = 1 [L320] p12_old = p12_new [L321] p12_new = nomsg [L322] p13_old = p13_new [L323] p13_new = nomsg [L324] p21_old = p21_new [L325] p21_new = nomsg [L326] p23_old = p23_new [L327] p23_new = nomsg [L328] p31_old = p31_new [L329] p31_new = nomsg [L330] p32_old = p32_new [L331] p32_new = nomsg [L333] int check__tmp; [L334] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L336] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L338] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L340] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L342] COND FALSE !(((int)r1) >= 2) [L348] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L350] COND TRUE ((int)r1) < 2 [L352] COND FALSE !(((int)r1) >= 2) [L358] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L360] COND TRUE ((int)r1) < 2 [L362] check__tmp = 1 [L363] __return_1846 = check__tmp [L364] main__c1 = __return_1846 [L366] _Bool __tmp_1; [L367] __tmp_1 = main__c1 [L368] _Bool assert__arg; [L369] assert__arg = __tmp_1 [L370] COND FALSE !(assert__arg == 0) [L377] COND TRUE !(mode1 == 0) [L379] COND FALSE !(r1 == 255) [L385] r1 = r1 + 1 [L386] COND FALSE !(!(ep21 == 0)) [L394] COND FALSE !(!(ep31 == 0)) [L402] COND FALSE !(((int)r1) == 2) [L408] mode1 = 0 [L410] COND TRUE !(mode2 == 0) [L412] COND FALSE !(r2 == 255) [L418] r2 = r2 + 1 [L419] COND FALSE !(!(ep12 == 0)) [L427] COND FALSE !(!(ep32 == 0)) [L435] COND FALSE !(((int)r2) == 2) [L441] mode2 = 0 [L443] COND TRUE !(mode3 == 0) [L445] COND FALSE !(r3 == 255) [L451] r3 = r3 + 1 [L452] COND FALSE !(!(ep13 == 0)) [L460] COND FALSE !(!(ep23 == 0)) [L468] COND FALSE !(((int)r3) == 2) [L474] mode3 = 0 [L475] p12_old = p12_new [L476] p12_new = nomsg [L477] p13_old = p13_new [L478] p13_new = nomsg [L479] p21_old = p21_new [L480] p21_new = nomsg [L481] p23_old = p23_new [L482] p23_new = nomsg [L483] p31_old = p31_new [L484] p31_new = nomsg [L485] p32_old = p32_new [L486] p32_new = nomsg [L488] int check__tmp; [L489] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L491] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L493] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L495] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L497] COND FALSE !(((int)r1) >= 2) [L503] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L505] COND TRUE ((int)r1) < 2 [L507] COND FALSE !(((int)r1) >= 2) [L513] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L515] COND TRUE ((int)r1) < 2 [L517] check__tmp = 1 [L518] __return_1964 = check__tmp [L519] main__c1 = __return_1964 [L521] _Bool __tmp_2; [L522] __tmp_2 = main__c1 [L523] _Bool assert__arg; [L524] assert__arg = __tmp_2 [L525] COND FALSE !(assert__arg == 0) [L532] COND FALSE !(!(mode1 == 0)) [L538] COND TRUE ((int)r1) < 2 [L540] COND FALSE !(!(ep12 == 0)) [L551] COND FALSE !(!(ep13 == 0)) [L562] mode1 = 1 [L564] COND FALSE !(!(mode2 == 0)) [L570] COND TRUE ((int)r2) < 2 [L572] COND FALSE !(!(ep21 == 0)) [L583] COND FALSE !(!(ep23 == 0)) [L594] mode2 = 1 [L596] COND FALSE !(!(mode3 == 0)) [L602] COND TRUE ((int)r3) < 2 [L604] COND FALSE !(!(ep31 == 0)) [L615] COND FALSE !(!(ep32 == 0)) [L626] mode3 = 1 [L627] p12_old = p12_new [L628] p12_new = nomsg [L629] p13_old = p13_new [L630] p13_new = nomsg [L631] p21_old = p21_new [L632] p21_new = nomsg [L633] p23_old = p23_new [L634] p23_new = nomsg [L635] p31_old = p31_new [L636] p31_new = nomsg [L637] p32_old = p32_new [L638] p32_new = nomsg [L640] int check__tmp; [L641] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L643] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L645] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L647] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L649] COND FALSE !(((int)r1) >= 2) [L655] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L657] COND TRUE ((int)r1) < 2 [L659] COND FALSE !(((int)r1) >= 2) [L665] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L667] COND TRUE ((int)r1) < 2 [L669] check__tmp = 1 [L670] __return_2082 = check__tmp [L671] main__c1 = __return_2082 [L673] _Bool __tmp_3; [L674] __tmp_3 = main__c1 [L675] _Bool assert__arg; [L676] assert__arg = __tmp_3 [L677] COND FALSE !(assert__arg == 0) [L684] COND TRUE !(mode1 == 0) [L686] COND FALSE !(r1 == 255) [L692] r1 = r1 + 1 [L693] COND FALSE !(!(ep21 == 0)) [L701] COND FALSE !(!(ep31 == 0)) [L709] COND TRUE ((int)r1) == 2 [L711] COND TRUE ((int)max1) == ((int)id1) [L713] st1 = 1 [L715] mode1 = 0 [L717] COND TRUE !(mode2 == 0) [L719] COND FALSE !(r2 == 255) [L725] r2 = r2 + 1 [L726] COND FALSE !(!(ep12 == 0)) [L734] COND FALSE !(!(ep32 == 0)) [L742] COND TRUE ((int)r2) == 2 [L744] COND TRUE ((int)max2) == ((int)id2) [L746] st2 = 1 [L748] mode2 = 0 [L750] COND TRUE !(mode3 == 0) [L752] COND FALSE !(r3 == 255) [L758] r3 = r3 + 1 [L759] COND FALSE !(!(ep13 == 0)) [L767] COND FALSE !(!(ep23 == 0)) [L775] COND TRUE ((int)r3) == 2 [L777] COND TRUE ((int)max3) == ((int)id3) [L779] st3 = 1 [L781] mode3 = 0 [L782] p12_old = p12_new [L783] p12_new = nomsg [L784] p13_old = p13_new [L785] p13_new = nomsg [L786] p21_old = p21_new [L787] p21_new = nomsg [L788] p23_old = p23_new [L789] p23_new = nomsg [L790] p31_old = p31_new [L791] p31_new = nomsg [L792] p32_old = p32_new [L793] p32_new = nomsg [L795] int check__tmp; [L796] COND FALSE !(((((int)st1) + ((int)st2)) + ((int)st3)) <= 1) [L1435] check__tmp = 0 [L824] __return_2205 = check__tmp [L825] main__c1 = __return_2205 [L828] _Bool __tmp_4; [L829] __tmp_4 = main__c1 [L830] _Bool assert__arg; [L831] assert__arg = __tmp_4 [L832] COND TRUE assert__arg == 0 [L834] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 829 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 90.4s, OverallIterations: 12, TraceHistogramMax: 1, AutomataDifference: 63.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16123 SDtfs, 12534 SDslu, 11565 SDs, 0 SdLazy, 16569 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27679occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 16.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 35152 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...