/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 0.2.0-b8ad66e [2020-10-23 22:10:18,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:10:18,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:10:18,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 22:10:18,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 22:10:18,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 22:10:18,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 22:10:18,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 22:10:18,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 22:10:18,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 22:10:18,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 22:10:18,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 22:10:18,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:10:18,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:10:18,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:10:18,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:10:18,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:10:18,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:10:18,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:10:18,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:10:18,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:10:18,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:10:18,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:10:18,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:10:18,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 22:10:18,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:10:18,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:10:18,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:10:18,720 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 22:10:18,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:10:18,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:10:18,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:10:18,749 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:10:18,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:10:18,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:10:18,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:10:18,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:10:18,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:10:18,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:10:18,751 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:10:18,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:10:18,752 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:10:18,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:10:18,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:10:18,753 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:10:18,753 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:10:18,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:10:18,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:10:18,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:10:18,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:10:18,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:10:18,754 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:10:19,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:10:19,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:10:19,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:10:19,193 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:10:19,193 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:10:19,195 INFO L432 ainManager$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 [2020-10-23 22:10:19,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73770e292/ccfcde29247f4d7e8205a3fe5bca3467/FLAG0c278fc48 [2020-10-23 22:10:20,043 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:10:20,044 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 [2020-10-23 22:10:20,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73770e292/ccfcde29247f4d7e8205a3fe5bca3467/FLAG0c278fc48 [2020-10-23 22:10:20,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73770e292/ccfcde29247f4d7e8205a3fe5bca3467 [2020-10-23 22:10:20,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:10:20,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:10:20,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:10:20,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:10:20,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:10:20,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:10:20" (1/1) ... [2020-10-23 22:10:20,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f17fba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:20, skipping insertion in model container [2020-10-23 22:10:20,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:10:20" (1/1) ... [2020-10-23 22:10:20,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:10:20,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:10:21,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:10:21,051 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:10:21,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:10:21,270 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:10:21,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:21 WrapperNode [2020-10-23 22:10:21,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:10:21,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:10:21,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:10:21,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:10:21,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:21" (1/1) ... [2020-10-23 22:10:21,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:21" (1/1) ... [2020-10-23 22:10:21,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:21" (1/1) ... [2020-10-23 22:10:21,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:21" (1/1) ... [2020-10-23 22:10:21,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:21" (1/1) ... [2020-10-23 22:10:21,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:21" (1/1) ... [2020-10-23 22:10:21,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:21" (1/1) ... [2020-10-23 22:10:21,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:10:21,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:10:21,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:10:21,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:10:21,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:10:21,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:10:21,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:10:21,495 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:10:21,496 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 22:10:21,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:10:21,496 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:10:21,496 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:10:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:10:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:10:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 22:10:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-23 22:10:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 22:10:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 22:10:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 22:10:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 22:10:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 22:10:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 22:10:21,499 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 22:10:21,499 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 22:10:21,499 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 22:10:21,499 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 22:10:21,499 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:10:21,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:10:21,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:10:21,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:10:21,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:10:21,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:10:21,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:10:23,470 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:10:23,470 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 22:10:23,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:10:23 BoogieIcfgContainer [2020-10-23 22:10:23,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:10:23,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:10:23,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:10:23,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:10:23,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:10:20" (1/3) ... [2020-10-23 22:10:23,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2421f106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:10:23, skipping insertion in model container [2020-10-23 22:10:23,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:10:21" (2/3) ... [2020-10-23 22:10:23,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2421f106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:10:23, skipping insertion in model container [2020-10-23 22:10:23,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:10:23" (3/3) ... [2020-10-23 22:10:23,485 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-23 22:10:23,498 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:10:23,505 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:10:23,520 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:10:23,547 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:10:23,547 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:10:23,547 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:10:23,547 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:10:23,547 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:10:23,548 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:10:23,548 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:10:23,548 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:10:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states. [2020-10-23 22:10:23,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2020-10-23 22:10:23,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:10:23,633 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] [2020-10-23 22:10:23,633 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:10:23,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:10:23,644 INFO L82 PathProgramCache]: Analyzing trace with hash -332063907, now seen corresponding path program 1 times [2020-10-23 22:10:23,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:10:23,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794179798] [2020-10-23 22:10:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:10:23,754 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:10:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:24,910 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-23 22:10:24,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:10:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:10:25,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794179798] [2020-10-23 22:10:25,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:10:25,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:10:25,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66519900] [2020-10-23 22:10:25,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:10:25,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:10:25,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:10:25,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:10:25,346 INFO L87 Difference]: Start difference. First operand 824 states. Second operand 4 states. [2020-10-23 22:10:28,951 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-23 22:10:29,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:10:29,608 INFO L93 Difference]: Finished difference Result 1494 states and 1969 transitions. [2020-10-23 22:10:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:10:29,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 416 [2020-10-23 22:10:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:10:29,643 INFO L225 Difference]: With dead ends: 1494 [2020-10-23 22:10:29,643 INFO L226 Difference]: Without dead ends: 1109 [2020-10-23 22:10:29,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:10:29,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2020-10-23 22:10:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1101. [2020-10-23 22:10:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1101 states. [2020-10-23 22:10:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1350 transitions. [2020-10-23 22:10:29,809 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1350 transitions. Word has length 416 [2020-10-23 22:10:29,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:10:29,818 INFO L481 AbstractCegarLoop]: Abstraction has 1101 states and 1350 transitions. [2020-10-23 22:10:29,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:10:29,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1350 transitions. [2020-10-23 22:10:29,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2020-10-23 22:10:29,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:10:29,836 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] [2020-10-23 22:10:29,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:10:29,837 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:10:29,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:10:29,838 INFO L82 PathProgramCache]: Analyzing trace with hash 444207933, now seen corresponding path program 1 times [2020-10-23 22:10:29,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:10:29,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426531697] [2020-10-23 22:10:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:10:29,861 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:10:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:30,715 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-23 22:10:30,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:10:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:10:30,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426531697] [2020-10-23 22:10:30,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:10:30,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:10:30,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245195327] [2020-10-23 22:10:30,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:10:30,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:10:30,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:10:30,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:10:30,970 INFO L87 Difference]: Start difference. First operand 1101 states and 1350 transitions. Second operand 5 states. [2020-10-23 22:10:35,053 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-23 22:10:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:10:36,301 INFO L93 Difference]: Finished difference Result 2892 states and 3613 transitions. [2020-10-23 22:10:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:10:36,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 416 [2020-10-23 22:10:36,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:10:36,314 INFO L225 Difference]: With dead ends: 2892 [2020-10-23 22:10:36,314 INFO L226 Difference]: Without dead ends: 1970 [2020-10-23 22:10:36,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:10:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2020-10-23 22:10:36,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1967. [2020-10-23 22:10:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1967 states. [2020-10-23 22:10:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 2433 transitions. [2020-10-23 22:10:36,479 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 2433 transitions. Word has length 416 [2020-10-23 22:10:36,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:10:36,480 INFO L481 AbstractCegarLoop]: Abstraction has 1967 states and 2433 transitions. [2020-10-23 22:10:36,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:10:36,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 2433 transitions. [2020-10-23 22:10:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-10-23 22:10:36,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:10:36,491 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] [2020-10-23 22:10:36,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:10:36,492 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:10:36,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:10:36,493 INFO L82 PathProgramCache]: Analyzing trace with hash 923884956, now seen corresponding path program 1 times [2020-10-23 22:10:36,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:10:36,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517061067] [2020-10-23 22:10:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:10:36,500 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:10:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:36,951 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-23 22:10:36,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:10:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:10:37,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517061067] [2020-10-23 22:10:37,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:10:37,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:10:37,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699332392] [2020-10-23 22:10:37,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:10:37,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:10:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:10:37,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:10:37,188 INFO L87 Difference]: Start difference. First operand 1967 states and 2433 transitions. Second operand 4 states. [2020-10-23 22:10:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:10:42,141 INFO L93 Difference]: Finished difference Result 5504 states and 6879 transitions. [2020-10-23 22:10:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 22:10:42,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 417 [2020-10-23 22:10:42,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:10:42,163 INFO L225 Difference]: With dead ends: 5504 [2020-10-23 22:10:42,163 INFO L226 Difference]: Without dead ends: 3750 [2020-10-23 22:10:42,168 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 [2020-10-23 22:10:42,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2020-10-23 22:10:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 1969. [2020-10-23 22:10:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1969 states. [2020-10-23 22:10:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2435 transitions. [2020-10-23 22:10:42,347 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2435 transitions. Word has length 417 [2020-10-23 22:10:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:10:42,348 INFO L481 AbstractCegarLoop]: Abstraction has 1969 states and 2435 transitions. [2020-10-23 22:10:42,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:10:42,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2435 transitions. [2020-10-23 22:10:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-10-23 22:10:42,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:10:42,359 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] [2020-10-23 22:10:42,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:10:42,359 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:10:42,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:10:42,360 INFO L82 PathProgramCache]: Analyzing trace with hash 384245306, now seen corresponding path program 1 times [2020-10-23 22:10:42,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:10:42,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989384706] [2020-10-23 22:10:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:10:42,364 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:10:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:42,794 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-23 22:10:42,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:10:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:10:43,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989384706] [2020-10-23 22:10:43,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:10:43,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:10:43,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655039073] [2020-10-23 22:10:43,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:10:43,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:10:43,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:10:43,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:10:43,018 INFO L87 Difference]: Start difference. First operand 1969 states and 2435 transitions. Second operand 4 states. [2020-10-23 22:10:46,833 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-23 22:10:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:10:48,028 INFO L93 Difference]: Finished difference Result 5201 states and 6500 transitions. [2020-10-23 22:10:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:10:48,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-10-23 22:10:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:10:48,048 INFO L225 Difference]: With dead ends: 5201 [2020-10-23 22:10:48,048 INFO L226 Difference]: Without dead ends: 3652 [2020-10-23 22:10:48,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:10:48,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3652 states. [2020-10-23 22:10:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3652 to 3649. [2020-10-23 22:10:48,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3649 states. [2020-10-23 22:10:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 4524 transitions. [2020-10-23 22:10:48,370 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 4524 transitions. Word has length 418 [2020-10-23 22:10:48,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:10:48,371 INFO L481 AbstractCegarLoop]: Abstraction has 3649 states and 4524 transitions. [2020-10-23 22:10:48,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:10:48,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 4524 transitions. [2020-10-23 22:10:48,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-10-23 22:10:48,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:10:48,384 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] [2020-10-23 22:10:48,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 22:10:48,384 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:10:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:10:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash 549367226, now seen corresponding path program 1 times [2020-10-23 22:10:48,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:10:48,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920195057] [2020-10-23 22:10:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:10:48,388 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:10:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:48,885 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-23 22:10:48,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:10:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:10:49,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920195057] [2020-10-23 22:10:49,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:10:49,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:10:49,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851545035] [2020-10-23 22:10:49,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:10:49,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:10:49,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:10:49,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:10:49,117 INFO L87 Difference]: Start difference. First operand 3649 states and 4524 transitions. Second operand 5 states. [2020-10-23 22:10:52,959 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-23 22:10:54,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:10:54,290 INFO L93 Difference]: Finished difference Result 10103 states and 12589 transitions. [2020-10-23 22:10:54,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:10:54,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 418 [2020-10-23 22:10:54,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:10:54,322 INFO L225 Difference]: With dead ends: 10103 [2020-10-23 22:10:54,323 INFO L226 Difference]: Without dead ends: 6638 [2020-10-23 22:10:54,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:10:54,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6638 states. [2020-10-23 22:10:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6638 to 6635. [2020-10-23 22:10:54,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6635 states. [2020-10-23 22:10:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 8204 transitions. [2020-10-23 22:10:54,977 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 8204 transitions. Word has length 418 [2020-10-23 22:10:54,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:10:54,978 INFO L481 AbstractCegarLoop]: Abstraction has 6635 states and 8204 transitions. [2020-10-23 22:10:54,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:10:54,979 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 8204 transitions. [2020-10-23 22:10:54,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-10-23 22:10:54,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:10:54,992 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] [2020-10-23 22:10:54,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 22:10:54,993 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:10:54,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:10:54,995 INFO L82 PathProgramCache]: Analyzing trace with hash 194469293, now seen corresponding path program 1 times [2020-10-23 22:10:54,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:10:54,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692958495] [2020-10-23 22:10:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:10:54,999 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:10:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:55,513 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-23 22:10:55,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:10:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:10:55,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692958495] [2020-10-23 22:10:55,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:10:55,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:10:55,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376886738] [2020-10-23 22:10:55,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:10:55,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:10:55,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:10:55,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:10:55,763 INFO L87 Difference]: Start difference. First operand 6635 states and 8204 transitions. Second operand 5 states. [2020-10-23 22:10:59,866 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-23 22:11:01,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:11:01,421 INFO L93 Difference]: Finished difference Result 18988 states and 23507 transitions. [2020-10-23 22:11:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:11:01,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 418 [2020-10-23 22:11:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:11:01,475 INFO L225 Difference]: With dead ends: 18988 [2020-10-23 22:11:01,476 INFO L226 Difference]: Without dead ends: 12612 [2020-10-23 22:11:01,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:11:01,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12612 states. [2020-10-23 22:11:02,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12612 to 12609. [2020-10-23 22:11:02,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12609 states. [2020-10-23 22:11:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12609 states to 12609 states and 15505 transitions. [2020-10-23 22:11:02,626 INFO L78 Accepts]: Start accepts. Automaton has 12609 states and 15505 transitions. Word has length 418 [2020-10-23 22:11:02,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:11:02,626 INFO L481 AbstractCegarLoop]: Abstraction has 12609 states and 15505 transitions. [2020-10-23 22:11:02,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:11:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 12609 states and 15505 transitions. [2020-10-23 22:11:02,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-10-23 22:11:02,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:11:02,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:11:02,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 22:11:02,648 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:11:02,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:11:02,648 INFO L82 PathProgramCache]: Analyzing trace with hash -662823656, now seen corresponding path program 1 times [2020-10-23 22:11:02,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:11:02,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873435753] [2020-10-23 22:11:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:11:02,652 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:11:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:03,045 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-23 22:11:03,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:11:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:11:03,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873435753] [2020-10-23 22:11:03,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:11:03,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:11:03,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627633991] [2020-10-23 22:11:03,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:11:03,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:11:03,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:11:03,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:11:03,274 INFO L87 Difference]: Start difference. First operand 12609 states and 15505 transitions. Second operand 4 states. [2020-10-23 22:11:09,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:11:09,727 INFO L93 Difference]: Finished difference Result 37242 states and 45850 transitions. [2020-10-23 22:11:09,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 22:11:09,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 419 [2020-10-23 22:11:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:11:09,784 INFO L225 Difference]: With dead ends: 37242 [2020-10-23 22:11:09,784 INFO L226 Difference]: Without dead ends: 24942 [2020-10-23 22:11:09,815 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 [2020-10-23 22:11:09,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24942 states. [2020-10-23 22:11:11,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24942 to 12619. [2020-10-23 22:11:11,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12619 states. [2020-10-23 22:11:11,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12619 states to 12619 states and 15515 transitions. [2020-10-23 22:11:11,206 INFO L78 Accepts]: Start accepts. Automaton has 12619 states and 15515 transitions. Word has length 419 [2020-10-23 22:11:11,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:11:11,207 INFO L481 AbstractCegarLoop]: Abstraction has 12619 states and 15515 transitions. [2020-10-23 22:11:11,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:11:11,207 INFO L276 IsEmpty]: Start isEmpty. Operand 12619 states and 15515 transitions. [2020-10-23 22:11:11,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-10-23 22:11:11,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:11:11,227 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] [2020-10-23 22:11:11,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 22:11:11,227 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:11:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:11:11,228 INFO L82 PathProgramCache]: Analyzing trace with hash -955242134, now seen corresponding path program 1 times [2020-10-23 22:11:11,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:11:11,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836231350] [2020-10-23 22:11:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:11:11,232 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:11:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:11,733 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-23 22:11:11,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:11:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:11:11,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836231350] [2020-10-23 22:11:11,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:11:11,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:11:11,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990405291] [2020-10-23 22:11:11,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:11:11,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:11:11,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:11:11,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:11:11,913 INFO L87 Difference]: Start difference. First operand 12619 states and 15515 transitions. Second operand 4 states. [2020-10-23 22:11:17,144 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-23 22:11:18,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:11:18,989 INFO L93 Difference]: Finished difference Result 33106 states and 40711 transitions. [2020-10-23 22:11:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:11:18,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 420 [2020-10-23 22:11:18,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:11:19,032 INFO L225 Difference]: With dead ends: 33106 [2020-10-23 22:11:19,033 INFO L226 Difference]: Without dead ends: 21811 [2020-10-23 22:11:19,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:11:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21811 states. [2020-10-23 22:11:21,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21811 to 21808. [2020-10-23 22:11:21,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21808 states. [2020-10-23 22:11:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21808 states to 21808 states and 26571 transitions. [2020-10-23 22:11:21,086 INFO L78 Accepts]: Start accepts. Automaton has 21808 states and 26571 transitions. Word has length 420 [2020-10-23 22:11:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:11:21,087 INFO L481 AbstractCegarLoop]: Abstraction has 21808 states and 26571 transitions. [2020-10-23 22:11:21,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:11:21,087 INFO L276 IsEmpty]: Start isEmpty. Operand 21808 states and 26571 transitions. [2020-10-23 22:11:21,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-10-23 22:11:21,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:11:21,116 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] [2020-10-23 22:11:21,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 22:11:21,116 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:11:21,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:11:21,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1347856150, now seen corresponding path program 1 times [2020-10-23 22:11:21,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:11:21,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551165999] [2020-10-23 22:11:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:11:21,120 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:11:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:21,593 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-23 22:11:21,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:11:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:11:22,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551165999] [2020-10-23 22:11:22,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:11:22,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:11:22,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283384647] [2020-10-23 22:11:22,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:11:22,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:11:22,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:11:22,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:11:22,076 INFO L87 Difference]: Start difference. First operand 21808 states and 26571 transitions. Second operand 5 states. [2020-10-23 22:11:28,244 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-23 22:11:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:11:31,143 INFO L93 Difference]: Finished difference Result 62392 states and 76022 transitions. [2020-10-23 22:11:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:11:31,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 420 [2020-10-23 22:11:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:11:31,204 INFO L225 Difference]: With dead ends: 62392 [2020-10-23 22:11:31,205 INFO L226 Difference]: Without dead ends: 40869 [2020-10-23 22:11:31,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:11:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40869 states. [2020-10-23 22:11:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40869 to 40866. [2020-10-23 22:11:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40866 states. [2020-10-23 22:11:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40866 states to 40866 states and 49454 transitions. [2020-10-23 22:11:35,169 INFO L78 Accepts]: Start accepts. Automaton has 40866 states and 49454 transitions. Word has length 420 [2020-10-23 22:11:35,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:11:35,170 INFO L481 AbstractCegarLoop]: Abstraction has 40866 states and 49454 transitions. [2020-10-23 22:11:35,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:11:35,170 INFO L276 IsEmpty]: Start isEmpty. Operand 40866 states and 49454 transitions. [2020-10-23 22:11:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-10-23 22:11:35,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:11:35,219 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] [2020-10-23 22:11:35,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 22:11:35,220 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:11:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:11:35,220 INFO L82 PathProgramCache]: Analyzing trace with hash -445357883, now seen corresponding path program 1 times [2020-10-23 22:11:35,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:11:35,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729719037] [2020-10-23 22:11:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:11:35,224 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:11:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:35,855 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-23 22:11:35,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:11:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:11:36,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729719037] [2020-10-23 22:11:36,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:11:36,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:11:36,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383244947] [2020-10-23 22:11:36,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:11:36,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:11:36,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:11:36,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:11:36,021 INFO L87 Difference]: Start difference. First operand 40866 states and 49454 transitions. Second operand 5 states. [2020-10-23 22:11:42,917 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-23 22:11:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:11:45,695 INFO L93 Difference]: Finished difference Result 82055 states and 99259 transitions. [2020-10-23 22:11:45,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:11:45,695 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 420 [2020-10-23 22:11:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:11:45,752 INFO L225 Difference]: With dead ends: 82055 [2020-10-23 22:11:45,752 INFO L226 Difference]: Without dead ends: 41951 [2020-10-23 22:11:45,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:11:45,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41951 states. [2020-10-23 22:11:50,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41951 to 41420. [2020-10-23 22:11:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41420 states. [2020-10-23 22:11:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41420 states to 41420 states and 50055 transitions. [2020-10-23 22:11:50,621 INFO L78 Accepts]: Start accepts. Automaton has 41420 states and 50055 transitions. Word has length 420 [2020-10-23 22:11:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:11:50,622 INFO L481 AbstractCegarLoop]: Abstraction has 41420 states and 50055 transitions. [2020-10-23 22:11:50,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:11:50,622 INFO L276 IsEmpty]: Start isEmpty. Operand 41420 states and 50055 transitions. [2020-10-23 22:11:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-10-23 22:11:50,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:11:50,649 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] [2020-10-23 22:11:50,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 22:11:50,650 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:11:50,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:11:50,650 INFO L82 PathProgramCache]: Analyzing trace with hash 138193644, now seen corresponding path program 1 times [2020-10-23 22:11:50,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:11:50,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440671938] [2020-10-23 22:11:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:11:50,654 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:11:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:51,177 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-23 22:11:51,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:11:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:11:51,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440671938] [2020-10-23 22:11:51,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:11:51,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:11:51,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479728848] [2020-10-23 22:11:51,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:11:51,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:11:51,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:11:51,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:11:51,328 INFO L87 Difference]: Start difference. First operand 41420 states and 50055 transitions. Second operand 4 states. [2020-10-23 22:12:05,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:12:05,623 INFO L93 Difference]: Finished difference Result 121212 states and 146678 transitions. [2020-10-23 22:12:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 22:12:05,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 421 [2020-10-23 22:12:05,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:12:05,726 INFO L225 Difference]: With dead ends: 121212 [2020-10-23 22:12:05,726 INFO L226 Difference]: Without dead ends: 82021 [2020-10-23 22:12:05,795 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 [2020-10-23 22:12:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82021 states. [2020-10-23 22:12:11,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82021 to 41460. [2020-10-23 22:12:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41460 states. [2020-10-23 22:12:11,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41460 states to 41460 states and 50095 transitions. [2020-10-23 22:12:11,346 INFO L78 Accepts]: Start accepts. Automaton has 41460 states and 50095 transitions. Word has length 421 [2020-10-23 22:12:11,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:12:11,346 INFO L481 AbstractCegarLoop]: Abstraction has 41460 states and 50095 transitions. [2020-10-23 22:12:11,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:12:11,346 INFO L276 IsEmpty]: Start isEmpty. Operand 41460 states and 50095 transitions. [2020-10-23 22:12:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-10-23 22:12:11,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:12:11,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:12:11,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 22:12:11,381 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:12:11,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:12:11,381 INFO L82 PathProgramCache]: Analyzing trace with hash -731315518, now seen corresponding path program 1 times [2020-10-23 22:12:11,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:12:11,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606508419] [2020-10-23 22:12:11,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:12:11,384 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:12:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:12:11,859 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-23 22:12:11,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:12:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:12:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:12:12,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606508419] [2020-10-23 22:12:12,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:12:12,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:12:12,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728827443] [2020-10-23 22:12:12,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:12:12,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:12:12,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:12:12,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:12:12,049 INFO L87 Difference]: Start difference. First operand 41460 states and 50095 transitions. Second operand 5 states. [2020-10-23 22:12:19,929 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-23 22:12:22,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:12:22,996 INFO L93 Difference]: Finished difference Result 84266 states and 101675 transitions. [2020-10-23 22:12:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:12:22,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 422 [2020-10-23 22:12:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:12:23,046 INFO L225 Difference]: With dead ends: 84266 [2020-10-23 22:12:23,046 INFO L226 Difference]: Without dead ends: 43435 [2020-10-23 22:12:23,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:12:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43435 states. [2020-10-23 22:12:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43435 to 42608. [2020-10-23 22:12:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42608 states. [2020-10-23 22:12:28,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42608 states to 42608 states and 51317 transitions. [2020-10-23 22:12:28,894 INFO L78 Accepts]: Start accepts. Automaton has 42608 states and 51317 transitions. Word has length 422 [2020-10-23 22:12:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:12:28,894 INFO L481 AbstractCegarLoop]: Abstraction has 42608 states and 51317 transitions. [2020-10-23 22:12:28,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:12:28,894 INFO L276 IsEmpty]: Start isEmpty. Operand 42608 states and 51317 transitions. [2020-10-23 22:12:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-10-23 22:12:28,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:12:28,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:12:28,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 22:12:28,933 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:12:28,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:12:28,934 INFO L82 PathProgramCache]: Analyzing trace with hash -2032677243, now seen corresponding path program 1 times [2020-10-23 22:12:28,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:12:28,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35310822] [2020-10-23 22:12:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:12:28,939 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:12:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 22:12:29,028 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 22:12:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 22:12:29,128 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 22:12:29,848 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 22:12:29,849 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 22:12:29,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 22:12:29,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:12:29 BoogieIcfgContainer [2020-10-23 22:12:29,905 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 22:12:29,907 INFO L168 Benchmark]: Toolchain (without parser) took 129596.24 ms. Allocated memory was 151.0 MB in the beginning and 4.5 GB in the end (delta: 4.4 GB). Free memory was 126.4 MB in the beginning and 3.2 GB in the end (delta: -3.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2020-10-23 22:12:29,907 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 22:12:29,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 950.46 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 130.1 MB in the end (delta: -4.4 MB). Peak memory consumption was 28.1 MB. Max. memory is 8.0 GB. [2020-10-23 22:12:29,908 INFO L168 Benchmark]: Boogie Preprocessor took 133.02 ms. Allocated memory is still 151.0 MB. Free memory was 130.1 MB in the beginning and 125.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-10-23 22:12:29,909 INFO L168 Benchmark]: RCFGBuilder took 2067.90 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 125.9 MB in the beginning and 136.5 MB in the end (delta: -10.6 MB). Peak memory consumption was 72.2 MB. Max. memory is 8.0 GB. [2020-10-23 22:12:29,910 INFO L168 Benchmark]: TraceAbstraction took 126428.75 ms. Allocated memory was 181.4 MB in the beginning and 4.5 GB in the end (delta: 4.3 GB). Free memory was 136.0 MB in the beginning and 3.2 GB in the end (delta: -3.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2020-10-23 22:12:29,912 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 950.46 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 130.1 MB in the end (delta: -4.4 MB). Peak memory consumption was 28.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 133.02 ms. Allocated memory is still 151.0 MB. Free memory was 130.1 MB in the beginning and 125.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 2067.90 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 125.9 MB in the beginning and 136.5 MB in the end (delta: -10.6 MB). Peak memory consumption was 72.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 126428.75 ms. Allocated memory was 181.4 MB in the beginning and 4.5 GB in the end (delta: 4.3 GB). Free memory was 136.0 MB in the beginning and 3.2 GB in the end (delta: -3.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] CALL reach_error() [L4] __assert_fail("0", "pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 829 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 126.3s, OverallIterations: 13, TraceHistogramMax: 1, AutomataDifference: 89.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16852 SDtfs, 12257 SDslu, 10743 SDs, 0 SdLazy, 17367 SolverSat, 139 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42608occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 25.8s AutomataMinimizationTime, 12 MinimizatonAttempts, 56049 StatesRemovedByMinimization, 12 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...