/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 18:22:19,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:22:19,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:22:19,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 18:22:19,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 18:22:19,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 18:22:19,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 18:22:19,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 18:22:19,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 18:22:19,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 18:22:19,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 18:22:19,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 18:22:19,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:22:19,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:22:19,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:22:19,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:22:19,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:22:19,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:22:19,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:22:19,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:22:19,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:22:19,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:22:19,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:22:19,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:22:19,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 18:22:19,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:22:19,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:22:19,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:22:19,864 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 18:22:19,913 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:22:19,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:22:19,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:22:19,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:22:19,918 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:22:19,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:22:19,918 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:22:19,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:22:19,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:22:19,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:22:19,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:22:19,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:22:19,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:22:19,920 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:22:19,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:22:19,921 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:22:19,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:22:19,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:22:19,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:22:19,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:22:19,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:22:19,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:22:19,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:22:19,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:22:19,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:22:19,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:22:19,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:22:19,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 18:22:19,923 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:22:20,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:22:20,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:22:20,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:22:20,373 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 18:22:20,373 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 18:22:20,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-02-19 18:22:20,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd0a1b34d/71a0e617b0ab46d58f115013d6656cc6/FLAG7ed4e7116 [2021-02-19 18:22:21,336 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 18:22:21,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-02-19 18:22:21,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd0a1b34d/71a0e617b0ab46d58f115013d6656cc6/FLAG7ed4e7116 [2021-02-19 18:22:21,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd0a1b34d/71a0e617b0ab46d58f115013d6656cc6 [2021-02-19 18:22:21,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:22:21,900 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:22:21,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 18:22:21,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 18:22:21,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 18:22:21,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:22:21" (1/1) ... [2021-02-19 18:22:21,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65b17fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:22:21, skipping insertion in model container [2021-02-19 18:22:21,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:22:21" (1/1) ... [2021-02-19 18:22:21,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 18:22:22,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 18:22:23,195 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[54471,54484] [2021-02-19 18:22:23,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:22:23,606 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 18:22:24,138 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[54471,54484] [2021-02-19 18:22:24,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:22:24,469 INFO L208 MainTranslator]: Completed translation [2021-02-19 18:22:24,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:22:24 WrapperNode [2021-02-19 18:22:24,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 18:22:24,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:22:24,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:22:24,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:22:24,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:22:24" (1/1) ... [2021-02-19 18:22:24,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:22:24" (1/1) ... [2021-02-19 18:22:24,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:22:24" (1/1) ... [2021-02-19 18:22:24,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:22:24" (1/1) ... [2021-02-19 18:22:24,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:22:24" (1/1) ... [2021-02-19 18:22:24,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:22:24" (1/1) ... [2021-02-19 18:22:24,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:22:24" (1/1) ... [2021-02-19 18:22:24,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:22:24,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:22:24,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:22:24,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:22:24,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:22:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:22:24,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 18:22:24,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:22:24,822 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 18:22:24,823 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-19 18:22:24,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 18:22:24,823 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 18:22:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 18:22:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 18:22:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 18:22:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-19 18:22:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-19 18:22:24,825 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-19 18:22:24,825 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-19 18:22:24,825 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-19 18:22:24,825 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-19 18:22:24,825 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-19 18:22:24,826 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-19 18:22:24,826 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-19 18:22:24,826 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-19 18:22:24,826 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2021-02-19 18:22:24,826 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-19 18:22:24,827 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-19 18:22:24,827 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 18:22:24,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 18:22:24,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 18:22:24,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:22:24,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 18:22:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 18:22:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 18:22:28,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:22:28,355 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:22:28,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:22:28 BoogieIcfgContainer [2021-02-19 18:22:28,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:22:28,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:22:28,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:22:28,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:22:28,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 06:22:21" (1/3) ... [2021-02-19 18:22:28,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5e9318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:22:28, skipping insertion in model container [2021-02-19 18:22:28,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:22:24" (2/3) ... [2021-02-19 18:22:28,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5e9318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:22:28, skipping insertion in model container [2021-02-19 18:22:28,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:22:28" (3/3) ... [2021-02-19 18:22:28,371 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-02-19 18:22:28,378 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:22:28,385 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:22:28,405 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 18:22:28,453 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:22:28,454 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:22:28,454 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:22:28,454 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:22:28,454 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:22:28,454 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:22:28,454 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:22:28,455 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:22:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states. [2021-02-19 18:22:28,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-02-19 18:22:28,547 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:22:28,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:28,550 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:22:28,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:28,556 INFO L82 PathProgramCache]: Analyzing trace with hash -885991230, now seen corresponding path program 1 times [2021-02-19 18:22:28,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:28,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591603600] [2021-02-19 18:22:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:30,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:30,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:30,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:30,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:22:30,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:30,686 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:22:30,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:30,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:31,732 WARN L202 SmtUtils]: Spent 988.00 ms on a formula simplification that was a NOOP. DAG size: 433 [2021-02-19 18:22:31,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:22:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:31,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:31,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:32,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591603600] [2021-02-19 18:22:32,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:22:32,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:22:32,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590240473] [2021-02-19 18:22:32,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:22:32,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:32,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:22:32,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:22:32,273 INFO L87 Difference]: Start difference. First operand 1431 states. Second operand 5 states. [2021-02-19 18:22:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:48,548 INFO L93 Difference]: Finished difference Result 4236 states and 7632 transitions. [2021-02-19 18:22:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:22:48,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2021-02-19 18:22:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:48,587 INFO L225 Difference]: With dead ends: 4236 [2021-02-19 18:22:48,587 INFO L226 Difference]: Without dead ends: 2814 [2021-02-19 18:22:48,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:22:48,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-02-19 18:22:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2812. [2021-02-19 18:22:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2812 states. [2021-02-19 18:22:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 4639 transitions. [2021-02-19 18:22:48,844 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 4639 transitions. Word has length 487 [2021-02-19 18:22:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:48,846 INFO L480 AbstractCegarLoop]: Abstraction has 2812 states and 4639 transitions. [2021-02-19 18:22:48,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-19 18:22:48,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 4639 transitions. [2021-02-19 18:22:48,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-02-19 18:22:48,863 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:22:48,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:48,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:22:48,864 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:22:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1163880926, now seen corresponding path program 1 times [2021-02-19 18:22:48,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:48,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426540128] [2021-02-19 18:22:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:49,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:49,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:49,291 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:49,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:22:49,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:49,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:50,435 WARN L202 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 433 [2021-02-19 18:22:50,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:22:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:50,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:50,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:50,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426540128] [2021-02-19 18:22:50,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:22:50,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:22:50,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812451046] [2021-02-19 18:22:50,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:22:50,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:50,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:22:50,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:22:50,760 INFO L87 Difference]: Start difference. First operand 2812 states and 4639 transitions. Second operand 4 states. [2021-02-19 18:23:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:09,492 INFO L93 Difference]: Finished difference Result 8158 states and 13422 transitions. [2021-02-19 18:23:09,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:23:09,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2021-02-19 18:23:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:09,524 INFO L225 Difference]: With dead ends: 8158 [2021-02-19 18:23:09,525 INFO L226 Difference]: Without dead ends: 5560 [2021-02-19 18:23:09,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:23:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2021-02-19 18:23:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 5558. [2021-02-19 18:23:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5558 states. [2021-02-19 18:23:09,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 9141 transitions. [2021-02-19 18:23:09,748 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 9141 transitions. Word has length 489 [2021-02-19 18:23:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:09,752 INFO L480 AbstractCegarLoop]: Abstraction has 5558 states and 9141 transitions. [2021-02-19 18:23:09,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:23:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 9141 transitions. [2021-02-19 18:23:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2021-02-19 18:23:09,775 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:23:09,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:09,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:23:09,777 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:23:09,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:09,778 INFO L82 PathProgramCache]: Analyzing trace with hash 398176197, now seen corresponding path program 1 times [2021-02-19 18:23:09,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:09,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585359340] [2021-02-19 18:23:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:10,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:10,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:10,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:10,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:23:10,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:10,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:11,263 WARN L202 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 433 [2021-02-19 18:23:11,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:23:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:11,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:11,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:11,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585359340] [2021-02-19 18:23:11,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:23:11,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:23:11,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315545180] [2021-02-19 18:23:11,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:23:11,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:11,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:23:11,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:23:11,504 INFO L87 Difference]: Start difference. First operand 5558 states and 9141 transitions. Second operand 4 states. [2021-02-19 18:23:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:29,436 INFO L93 Difference]: Finished difference Result 16577 states and 27255 transitions. [2021-02-19 18:23:29,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:23:29,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2021-02-19 18:23:29,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:29,488 INFO L225 Difference]: With dead ends: 16577 [2021-02-19 18:23:29,488 INFO L226 Difference]: Without dead ends: 11071 [2021-02-19 18:23:29,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:23:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2021-02-19 18:23:29,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 5605. [2021-02-19 18:23:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5605 states. [2021-02-19 18:23:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 9215 transitions. [2021-02-19 18:23:29,846 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 9215 transitions. Word has length 490 [2021-02-19 18:23:29,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:29,847 INFO L480 AbstractCegarLoop]: Abstraction has 5605 states and 9215 transitions. [2021-02-19 18:23:29,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:23:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 9215 transitions. [2021-02-19 18:23:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-02-19 18:23:29,862 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:23:29,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:29,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:23:29,864 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:23:29,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:29,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1156201127, now seen corresponding path program 1 times [2021-02-19 18:23:29,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:29,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115201698] [2021-02-19 18:23:29,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:30,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:30,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:30,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:30,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:23:30,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:30,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:31,351 WARN L202 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 433 [2021-02-19 18:23:31,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:23:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:31,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:31,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:31,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115201698] [2021-02-19 18:23:31,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:23:31,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:23:31,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200976943] [2021-02-19 18:23:31,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:23:31,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:31,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:23:31,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:23:31,704 INFO L87 Difference]: Start difference. First operand 5605 states and 9215 transitions. Second operand 4 states. [2021-02-19 18:23:50,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:50,289 INFO L93 Difference]: Finished difference Result 16140 states and 26444 transitions. [2021-02-19 18:23:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:23:50,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2021-02-19 18:23:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:50,326 INFO L225 Difference]: With dead ends: 16140 [2021-02-19 18:23:50,327 INFO L226 Difference]: Without dead ends: 10934 [2021-02-19 18:23:50,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:23:50,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10934 states. [2021-02-19 18:23:50,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10934 to 10932. [2021-02-19 18:23:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10932 states. [2021-02-19 18:23:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10932 states to 10932 states and 17885 transitions. [2021-02-19 18:23:50,847 INFO L78 Accepts]: Start accepts. Automaton has 10932 states and 17885 transitions. Word has length 491 [2021-02-19 18:23:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:50,848 INFO L480 AbstractCegarLoop]: Abstraction has 10932 states and 17885 transitions. [2021-02-19 18:23:50,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:23:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 10932 states and 17885 transitions. [2021-02-19 18:23:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-02-19 18:23:50,870 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:23:50,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:50,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:23:50,871 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:23:50,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:50,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1466935554, now seen corresponding path program 1 times [2021-02-19 18:23:50,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:50,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854968690] [2021-02-19 18:23:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:51,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:51,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:51,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:51,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:23:51,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:51,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:52,214 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 433 [2021-02-19 18:23:52,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:23:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:52,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:52,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:52,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854968690] [2021-02-19 18:23:52,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:23:52,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:23:52,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629791469] [2021-02-19 18:23:52,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:23:52,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:52,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:23:52,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:23:52,443 INFO L87 Difference]: Start difference. First operand 10932 states and 17885 transitions. Second operand 4 states. [2021-02-19 18:24:11,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:11,864 INFO L93 Difference]: Finished difference Result 32540 states and 53210 transitions. [2021-02-19 18:24:11,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:24:11,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2021-02-19 18:24:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:11,913 INFO L225 Difference]: With dead ends: 32540 [2021-02-19 18:24:11,913 INFO L226 Difference]: Without dead ends: 21752 [2021-02-19 18:24:11,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:24:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21752 states. [2021-02-19 18:24:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21752 to 11030. [2021-02-19 18:24:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11030 states. [2021-02-19 18:24:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 18036 transitions. [2021-02-19 18:24:12,558 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 18036 transitions. Word has length 491 [2021-02-19 18:24:12,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:12,558 INFO L480 AbstractCegarLoop]: Abstraction has 11030 states and 18036 transitions. [2021-02-19 18:24:12,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:24:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 18036 transitions. [2021-02-19 18:24:12,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2021-02-19 18:24:12,583 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:24:12,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:12,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 18:24:12,584 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:24:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2121398996, now seen corresponding path program 1 times [2021-02-19 18:24:12,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:12,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180875618] [2021-02-19 18:24:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:12,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:12,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:12,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:12,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:24:12,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:12,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:13,966 WARN L202 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 433 [2021-02-19 18:24:13,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:24:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:13,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:13,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:14,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180875618] [2021-02-19 18:24:14,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:24:14,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:24:14,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173662299] [2021-02-19 18:24:14,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:24:14,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:14,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:24:14,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:24:14,265 INFO L87 Difference]: Start difference. First operand 11030 states and 18036 transitions. Second operand 4 states. [2021-02-19 18:24:34,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:34,234 INFO L93 Difference]: Finished difference Result 32675 states and 53391 transitions. [2021-02-19 18:24:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:24:34,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2021-02-19 18:24:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:34,282 INFO L225 Difference]: With dead ends: 32675 [2021-02-19 18:24:34,282 INFO L226 Difference]: Without dead ends: 21869 [2021-02-19 18:24:34,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:24:34,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21869 states. [2021-02-19 18:24:34,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21869 to 11147. [2021-02-19 18:24:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11147 states. [2021-02-19 18:24:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11147 states to 11147 states and 18182 transitions. [2021-02-19 18:24:34,999 INFO L78 Accepts]: Start accepts. Automaton has 11147 states and 18182 transitions. Word has length 492 [2021-02-19 18:24:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:34,999 INFO L480 AbstractCegarLoop]: Abstraction has 11147 states and 18182 transitions. [2021-02-19 18:24:34,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:24:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 11147 states and 18182 transitions. [2021-02-19 18:24:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-02-19 18:24:35,020 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:24:35,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:35,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 18:24:35,021 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:24:35,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:35,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1646177524, now seen corresponding path program 1 times [2021-02-19 18:24:35,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:35,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754540326] [2021-02-19 18:24:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:35,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:35,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:35,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:35,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:24:35,288 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:35,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:36,423 WARN L202 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 433 [2021-02-19 18:24:36,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:24:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:36,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:36,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:36,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754540326] [2021-02-19 18:24:36,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:24:36,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:24:36,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480307365] [2021-02-19 18:24:36,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:24:36,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:36,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:24:36,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:24:36,859 INFO L87 Difference]: Start difference. First operand 11147 states and 18182 transitions. Second operand 4 states. [2021-02-19 18:24:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:57,026 INFO L93 Difference]: Finished difference Result 31726 states and 51629 transitions. [2021-02-19 18:24:57,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:24:57,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2021-02-19 18:24:57,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:57,068 INFO L225 Difference]: With dead ends: 31726 [2021-02-19 18:24:57,068 INFO L226 Difference]: Without dead ends: 21548 [2021-02-19 18:24:57,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:24:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21548 states. [2021-02-19 18:24:57,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21548 to 21546. [2021-02-19 18:24:57,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21546 states. [2021-02-19 18:24:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21546 states to 21546 states and 34987 transitions. [2021-02-19 18:24:57,914 INFO L78 Accepts]: Start accepts. Automaton has 21546 states and 34987 transitions. Word has length 493 [2021-02-19 18:24:57,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:57,915 INFO L480 AbstractCegarLoop]: Abstraction has 21546 states and 34987 transitions. [2021-02-19 18:24:57,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:24:57,915 INFO L276 IsEmpty]: Start isEmpty. Operand 21546 states and 34987 transitions. [2021-02-19 18:24:57,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-02-19 18:24:57,947 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:24:57,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:57,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 18:24:57,947 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:24:57,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:57,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1987927823, now seen corresponding path program 1 times [2021-02-19 18:24:57,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:57,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455617523] [2021-02-19 18:24:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:59,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:59,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:59,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:59,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:24:59,060 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-19 18:24:59,061 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-19 18:24:59,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:59,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:24:59,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:59,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:00,225 WARN L202 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 433 [2021-02-19 18:25:00,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:25:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:00,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:00,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:00,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455617523] [2021-02-19 18:25:00,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:25:00,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:25:00,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651489204] [2021-02-19 18:25:00,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:25:00,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:00,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:25:00,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:25:00,639 INFO L87 Difference]: Start difference. First operand 21546 states and 34987 transitions. Second operand 6 states. [2021-02-19 18:25:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:17,110 INFO L93 Difference]: Finished difference Result 63142 states and 102509 transitions. [2021-02-19 18:25:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:25:17,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 493 [2021-02-19 18:25:17,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:17,164 INFO L225 Difference]: With dead ends: 63142 [2021-02-19 18:25:17,164 INFO L226 Difference]: Without dead ends: 41814 [2021-02-19 18:25:17,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:25:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41814 states. [2021-02-19 18:25:19,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41814 to 41812. [2021-02-19 18:25:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41812 states. [2021-02-19 18:25:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41812 states to 41812 states and 67578 transitions. [2021-02-19 18:25:19,080 INFO L78 Accepts]: Start accepts. Automaton has 41812 states and 67578 transitions. Word has length 493 [2021-02-19 18:25:19,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:19,081 INFO L480 AbstractCegarLoop]: Abstraction has 41812 states and 67578 transitions. [2021-02-19 18:25:19,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 18:25:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 41812 states and 67578 transitions. [2021-02-19 18:25:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2021-02-19 18:25:19,119 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:25:19,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:19,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 18:25:19,120 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:25:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:19,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1844019527, now seen corresponding path program 1 times [2021-02-19 18:25:19,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:19,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711786257] [2021-02-19 18:25:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:19,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:19,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:19,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:19,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:25:19,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:19,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:20,562 WARN L202 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 433 [2021-02-19 18:25:20,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:25:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:20,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:20,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:21,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711786257] [2021-02-19 18:25:21,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:25:21,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:25:21,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078928163] [2021-02-19 18:25:21,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:25:21,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:21,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:25:21,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:25:21,224 INFO L87 Difference]: Start difference. First operand 41812 states and 67578 transitions. Second operand 4 states. [2021-02-19 18:25:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:44,567 INFO L93 Difference]: Finished difference Result 122638 states and 198033 transitions. [2021-02-19 18:25:44,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:25:44,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2021-02-19 18:25:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:44,682 INFO L225 Difference]: With dead ends: 122638 [2021-02-19 18:25:44,683 INFO L226 Difference]: Without dead ends: 82368 [2021-02-19 18:25:44,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:25:44,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82368 states. [2021-02-19 18:25:48,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82368 to 82366. [2021-02-19 18:25:48,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82366 states. [2021-02-19 18:25:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82366 states to 82366 states and 132616 transitions. [2021-02-19 18:25:48,814 INFO L78 Accepts]: Start accepts. Automaton has 82366 states and 132616 transitions. Word has length 495 [2021-02-19 18:25:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:48,815 INFO L480 AbstractCegarLoop]: Abstraction has 82366 states and 132616 transitions. [2021-02-19 18:25:48,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:25:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 82366 states and 132616 transitions. [2021-02-19 18:25:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2021-02-19 18:25:49,110 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:25:49,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:49,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 18:25:49,111 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:25:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:49,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1801154341, now seen corresponding path program 1 times [2021-02-19 18:25:49,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:49,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798102090] [2021-02-19 18:25:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:49,578 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:49,579 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:49,581 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:49,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:25:49,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:49,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:50,890 WARN L202 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 433 [2021-02-19 18:25:50,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:25:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:50,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:50,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:51,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798102090] [2021-02-19 18:25:51,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:25:51,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:25:51,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291969622] [2021-02-19 18:25:51,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:25:51,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:51,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:25:51,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:25:51,217 INFO L87 Difference]: Start difference. First operand 82366 states and 132616 transitions. Second operand 4 states. [2021-02-19 18:26:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:09,379 INFO L93 Difference]: Finished difference Result 161138 states and 256570 transitions. [2021-02-19 18:26:09,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:26:09,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2021-02-19 18:26:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:09,637 INFO L225 Difference]: With dead ends: 161138 [2021-02-19 18:26:09,637 INFO L226 Difference]: Without dead ends: 110496 [2021-02-19 18:26:09,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:26:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110496 states. [2021-02-19 18:26:14,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110496 to 94174. [2021-02-19 18:26:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94174 states. [2021-02-19 18:26:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94174 states to 94174 states and 152040 transitions. [2021-02-19 18:26:14,152 INFO L78 Accepts]: Start accepts. Automaton has 94174 states and 152040 transitions. Word has length 495 [2021-02-19 18:26:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:14,153 INFO L480 AbstractCegarLoop]: Abstraction has 94174 states and 152040 transitions. [2021-02-19 18:26:14,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:26:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 94174 states and 152040 transitions. [2021-02-19 18:26:14,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2021-02-19 18:26:14,219 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:26:14,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:14,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 18:26:14,220 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:26:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1261135745, now seen corresponding path program 1 times [2021-02-19 18:26:14,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:14,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727097723] [2021-02-19 18:26:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:15,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:15,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:26:15,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:15,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:26:15,139 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-19 18:26:15,144 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-19 18:26:15,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:15,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:26:15,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:15,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:26:16,996 WARN L202 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 433 [2021-02-19 18:26:16,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:26:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:17,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:17,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:26:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:17,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727097723] [2021-02-19 18:26:17,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:26:17,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:26:17,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207371926] [2021-02-19 18:26:17,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:26:17,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:17,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:26:17,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:26:17,393 INFO L87 Difference]: Start difference. First operand 94174 states and 152040 transitions. Second operand 6 states. [2021-02-19 18:26:42,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:42,107 INFO L93 Difference]: Finished difference Result 279164 states and 450811 transitions. [2021-02-19 18:26:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:26:42,108 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 497 [2021-02-19 18:26:42,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:42,520 INFO L225 Difference]: With dead ends: 279164 [2021-02-19 18:26:42,520 INFO L226 Difference]: Without dead ends: 185327 [2021-02-19 18:26:42,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:26:42,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185327 states. [2021-02-19 18:26:51,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185327 to 185325. [2021-02-19 18:26:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185325 states. [2021-02-19 18:26:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185325 states to 185325 states and 297982 transitions. [2021-02-19 18:26:52,210 INFO L78 Accepts]: Start accepts. Automaton has 185325 states and 297982 transitions. Word has length 497 [2021-02-19 18:26:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:52,210 INFO L480 AbstractCegarLoop]: Abstraction has 185325 states and 297982 transitions. [2021-02-19 18:26:52,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 18:26:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 185325 states and 297982 transitions. [2021-02-19 18:26:52,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2021-02-19 18:26:52,680 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:26:52,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:52,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 18:26:52,681 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:26:52,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:52,682 INFO L82 PathProgramCache]: Analyzing trace with hash -699580992, now seen corresponding path program 1 times [2021-02-19 18:26:52,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:52,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623873311] [2021-02-19 18:26:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:53,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:53,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:26:53,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:53,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:26:53,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:53,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:26:53,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:53,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:26:54,853 WARN L202 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 433 [2021-02-19 18:26:54,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:26:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:54,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:54,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:26:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:55,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623873311] [2021-02-19 18:26:55,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:26:55,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:26:55,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545805661] [2021-02-19 18:26:55,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:26:55,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:55,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:26:55,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:26:55,284 INFO L87 Difference]: Start difference. First operand 185325 states and 297982 transitions. Second operand 5 states. [2021-02-19 18:27:28,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:28,268 INFO L93 Difference]: Finished difference Result 550363 states and 884742 transitions. [2021-02-19 18:27:28,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:27:28,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 499 [2021-02-19 18:27:28,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:28,878 INFO L225 Difference]: With dead ends: 550363 [2021-02-19 18:27:28,878 INFO L226 Difference]: Without dead ends: 365889 [2021-02-19 18:27:29,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:27:29,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365889 states. [2021-02-19 18:27:48,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365889 to 365887. [2021-02-19 18:27:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365887 states. [2021-02-19 18:27:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365887 states to 365887 states and 585792 transitions. [2021-02-19 18:27:49,643 INFO L78 Accepts]: Start accepts. Automaton has 365887 states and 585792 transitions. Word has length 499 [2021-02-19 18:27:49,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:49,643 INFO L480 AbstractCegarLoop]: Abstraction has 365887 states and 585792 transitions. [2021-02-19 18:27:49,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-19 18:27:49,657 INFO L276 IsEmpty]: Start isEmpty. Operand 365887 states and 585792 transitions. [2021-02-19 18:27:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2021-02-19 18:27:50,472 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:27:50,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:50,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 18:27:50,473 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:27:50,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:50,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1719551616, now seen corresponding path program 1 times [2021-02-19 18:27:50,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:50,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350904043] [2021-02-19 18:27:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:50,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:50,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:27:50,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:50,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:27:50,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:50,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:27:52,037 WARN L202 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 433 [2021-02-19 18:27:52,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:27:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:52,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:52,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:27:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:52,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350904043] [2021-02-19 18:27:52,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:27:52,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:27:52,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020695095] [2021-02-19 18:27:52,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:27:52,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:52,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:27:52,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:27:52,399 INFO L87 Difference]: Start difference. First operand 365887 states and 585792 transitions. Second operand 4 states.