/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.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 18:22:55,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:22:55,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:22:55,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 18:22:55,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 18:22:55,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 18:22:55,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 18:22:55,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 18:22:55,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 18:22:55,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 18:22:55,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 18:22:55,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 18:22:55,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:22:55,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:22:55,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:22:55,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:22:55,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:22:55,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:22:55,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:22:55,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:22:55,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:22:55,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:22:55,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:22:55,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:22:55,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 18:22:55,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:22:55,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:22:55,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:22:55,676 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 18:22:55,731 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:22:55,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:22:55,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:22:55,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:22:55,734 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:22:55,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:22:55,735 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:22:55,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:22:55,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:22:55,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:22:55,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:22:55,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:22:55,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:22:55,737 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:22:55,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:22:55,737 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:22:55,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:22:55,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:22:55,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:22:55,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:22:55,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:22:55,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:22:55,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:22:55,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:22:55,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:22:55,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:22:55,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:22:55,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 18:22:55,766 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:22:56,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:22:56,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:22:56,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:22:56,264 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 18:22:56,265 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 18:22:56,266 INFO L432 ainManager$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.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-19 18:22:56,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6ccd28c/3ab10534b4004f92ac8d93f09a1e5490/FLAG4bd48ccb3 [2021-02-19 18:22:57,246 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 18:22:57,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-19 18:22:57,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6ccd28c/3ab10534b4004f92ac8d93f09a1e5490/FLAG4bd48ccb3 [2021-02-19 18:22:57,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6ccd28c/3ab10534b4004f92ac8d93f09a1e5490 [2021-02-19 18:22:57,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:22:57,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:22:57,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 18:22:57,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 18:22:57,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 18:22:57,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:22:57" (1/1) ... [2021-02-19 18:22:57,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19f4fad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:22:57, skipping insertion in model container [2021-02-19 18:22:57,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:22:57" (1/1) ... [2021-02-19 18:22:57,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 18:22:58,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 18:22:59,074 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.UNBOUNDED.pals.c.v+nlh-reducer.c[54562,54575] [2021-02-19 18:22:59,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:22:59,490 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 18:23:00,172 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.UNBOUNDED.pals.c.v+nlh-reducer.c[54562,54575] [2021-02-19 18:23:00,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:23:00,496 INFO L208 MainTranslator]: Completed translation [2021-02-19 18:23:00,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:23:00 WrapperNode [2021-02-19 18:23:00,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 18:23:00,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:23:00,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:23:00,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:23:00,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:23:00" (1/1) ... [2021-02-19 18:23:00,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:23:00" (1/1) ... [2021-02-19 18:23:00,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:23:00" (1/1) ... [2021-02-19 18:23:00,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:23:00" (1/1) ... [2021-02-19 18:23:00,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:23:00" (1/1) ... [2021-02-19 18:23:00,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:23:00" (1/1) ... [2021-02-19 18:23:00,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:23:00" (1/1) ... [2021-02-19 18:23:00,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:23:00,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:23:00,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:23:00,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:23:00,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:23:00" (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 18:23:00,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 18:23:00,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:23:00,885 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 18:23:00,886 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-19 18:23:00,886 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 18:23:00,887 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 18:23:00,887 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 18:23:00,887 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 18:23:00,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 18:23:00,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-19 18:23:00,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-02-19 18:23:00,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-19 18:23:00,889 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-19 18:23:00,889 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-19 18:23:00,892 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-19 18:23:00,892 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-19 18:23:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-19 18:23:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-19 18:23:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-19 18:23:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-19 18:23:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2021-02-19 18:23:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-19 18:23:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-19 18:23:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 18:23:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 18:23:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 18:23:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:23:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 18:23:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 18:23:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 18:23:05,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:23:05,350 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:23:05,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:23:05 BoogieIcfgContainer [2021-02-19 18:23:05,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:23:05,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:23:05,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:23:05,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:23:05,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 06:22:57" (1/3) ... [2021-02-19 18:23:05,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708d90d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:23:05, skipping insertion in model container [2021-02-19 18:23:05,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:23:00" (2/3) ... [2021-02-19 18:23:05,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708d90d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:23:05, skipping insertion in model container [2021-02-19 18:23:05,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:23:05" (3/3) ... [2021-02-19 18:23:05,372 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-19 18:23:05,384 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:23:05,393 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:23:05,416 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 18:23:05,473 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:23:05,473 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:23:05,473 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:23:05,473 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:23:05,473 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:23:05,474 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:23:05,474 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:23:05,474 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:23:05,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states. [2021-02-19 18:23:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-02-19 18:23:05,564 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:23:05,566 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] [2021-02-19 18:23:05,566 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:23:05,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:05,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1207961459, now seen corresponding path program 1 times [2021-02-19 18:23:05,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:05,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054299400] [2021-02-19 18:23:05,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:07,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:07,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:07,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:07,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:23:07,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:07,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:08,422 WARN L202 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-19 18:23:08,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:23:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:08,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:08,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:08,860 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 18:23:08,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054299400] [2021-02-19 18:23:08,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:23:08,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:23:08,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789817487] [2021-02-19 18:23:08,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:23:08,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:23:08,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:23:08,888 INFO L87 Difference]: Start difference. First operand 1449 states. Second operand 4 states. [2021-02-19 18:23:10,099 WARN L202 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 428 [2021-02-19 18:23:21,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:21,200 INFO L93 Difference]: Finished difference Result 2488 states and 4423 transitions. [2021-02-19 18:23:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:23:21,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2021-02-19 18:23:21,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:21,241 INFO L225 Difference]: With dead ends: 2488 [2021-02-19 18:23:21,241 INFO L226 Difference]: Without dead ends: 2186 [2021-02-19 18:23:21,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:23:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2021-02-19 18:23:21,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2021-02-19 18:23:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2021-02-19 18:23:21,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3563 transitions. [2021-02-19 18:23:21,439 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3563 transitions. Word has length 496 [2021-02-19 18:23:21,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:21,445 INFO L480 AbstractCegarLoop]: Abstraction has 2184 states and 3563 transitions. [2021-02-19 18:23:21,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:23:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3563 transitions. [2021-02-19 18:23:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-02-19 18:23:21,464 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:23:21,465 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] [2021-02-19 18:23:21,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:23:21,466 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:23:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:21,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1252335372, now seen corresponding path program 1 times [2021-02-19 18:23:21,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:21,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388359913] [2021-02-19 18:23:21,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:22,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:22,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:22,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:22,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:23:22,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:22,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:23:22,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:22,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:24,098 WARN L202 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-19 18:23:24,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:23:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:24,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:24,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:24,483 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 18:23:24,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388359913] [2021-02-19 18:23:24,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:23:24,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:23:24,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717845772] [2021-02-19 18:23:24,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:23:24,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:24,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:23:24,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:23:24,495 INFO L87 Difference]: Start difference. First operand 2184 states and 3563 transitions. Second operand 5 states. [2021-02-19 18:23:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:41,304 INFO L93 Difference]: Finished difference Result 6476 states and 10564 transitions. [2021-02-19 18:23:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:23:41,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2021-02-19 18:23:41,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:41,333 INFO L225 Difference]: With dead ends: 6476 [2021-02-19 18:23:41,333 INFO L226 Difference]: Without dead ends: 4309 [2021-02-19 18:23:41,346 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 18:23:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2021-02-19 18:23:41,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 4307. [2021-02-19 18:23:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4307 states. [2021-02-19 18:23:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 7000 transitions. [2021-02-19 18:23:41,543 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 7000 transitions. Word has length 496 [2021-02-19 18:23:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:41,544 INFO L480 AbstractCegarLoop]: Abstraction has 4307 states and 7000 transitions. [2021-02-19 18:23:41,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-19 18:23:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 7000 transitions. [2021-02-19 18:23:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2021-02-19 18:23:41,561 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:23:41,562 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] [2021-02-19 18:23:41,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:23:41,563 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:23:41,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:41,564 INFO L82 PathProgramCache]: Analyzing trace with hash -692847895, now seen corresponding path program 1 times [2021-02-19 18:23:41,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:41,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271921071] [2021-02-19 18:23:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:41,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:41,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:41,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:41,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:23:41,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:41,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:43,035 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-19 18:23:43,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:23:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:43,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:43,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:43,409 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 18:23:43,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271921071] [2021-02-19 18:23:43,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:23:43,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:23:43,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534625260] [2021-02-19 18:23:43,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:23:43,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:43,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:23:43,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:23:43,412 INFO L87 Difference]: Start difference. First operand 4307 states and 7000 transitions. Second operand 4 states. [2021-02-19 18:24:03,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:03,083 INFO L93 Difference]: Finished difference Result 12605 states and 20441 transitions. [2021-02-19 18:24:03,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:24:03,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2021-02-19 18:24:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:03,131 INFO L225 Difference]: With dead ends: 12605 [2021-02-19 18:24:03,131 INFO L226 Difference]: Without dead ends: 8512 [2021-02-19 18:24:03,142 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 18:24:03,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8512 states. [2021-02-19 18:24:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8512 to 8510. [2021-02-19 18:24:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8510 states. [2021-02-19 18:24:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 13785 transitions. [2021-02-19 18:24:03,549 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 13785 transitions. Word has length 498 [2021-02-19 18:24:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:03,550 INFO L480 AbstractCegarLoop]: Abstraction has 8510 states and 13785 transitions. [2021-02-19 18:24:03,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:24:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 13785 transitions. [2021-02-19 18:24:03,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2021-02-19 18:24:03,581 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:24:03,582 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 18:24:03,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:24:03,583 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:24:03,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:03,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1954347945, now seen corresponding path program 1 times [2021-02-19 18:24:03,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:03,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419604632] [2021-02-19 18:24:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:03,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:03,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:03,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:03,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:24:03,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:03,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:05,072 WARN L202 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-19 18:24:05,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:24:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:05,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:05,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:05,411 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 18:24:05,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419604632] [2021-02-19 18:24:05,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:24:05,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:24:05,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279033727] [2021-02-19 18:24:05,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:24:05,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:05,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:24:05,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:24:05,414 INFO L87 Difference]: Start difference. First operand 8510 states and 13785 transitions. Second operand 4 states. [2021-02-19 18:24:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:25,748 INFO L93 Difference]: Finished difference Result 25433 states and 41187 transitions. [2021-02-19 18:24:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:24:25,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2021-02-19 18:24:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:25,827 INFO L225 Difference]: With dead ends: 25433 [2021-02-19 18:24:25,828 INFO L226 Difference]: Without dead ends: 16975 [2021-02-19 18:24:25,850 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 18:24:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16975 states. [2021-02-19 18:24:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16975 to 8557. [2021-02-19 18:24:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8557 states. [2021-02-19 18:24:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8557 states to 8557 states and 13859 transitions. [2021-02-19 18:24:26,479 INFO L78 Accepts]: Start accepts. Automaton has 8557 states and 13859 transitions. Word has length 499 [2021-02-19 18:24:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:26,479 INFO L480 AbstractCegarLoop]: Abstraction has 8557 states and 13859 transitions. [2021-02-19 18:24:26,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:24:26,480 INFO L276 IsEmpty]: Start isEmpty. Operand 8557 states and 13859 transitions. [2021-02-19 18:24:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2021-02-19 18:24:26,505 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:24:26,506 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] [2021-02-19 18:24:26,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:24:26,507 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:24:26,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:26,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1552552484, now seen corresponding path program 1 times [2021-02-19 18:24:26,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:26,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594076960] [2021-02-19 18:24:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:26,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:26,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:26,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:26,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:24:26,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:26,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:27,997 WARN L202 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-19 18:24:27,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:24:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:28,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:28,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:28,427 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 18:24:28,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594076960] [2021-02-19 18:24:28,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:24:28,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:24:28,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671329501] [2021-02-19 18:24:28,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:24:28,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:28,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:24:28,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:24:28,430 INFO L87 Difference]: Start difference. First operand 8557 states and 13859 transitions. Second operand 4 states. [2021-02-19 18:24:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:49,580 INFO L93 Difference]: Finished difference Result 24920 states and 40248 transitions. [2021-02-19 18:24:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:24:49,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2021-02-19 18:24:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:49,626 INFO L225 Difference]: With dead ends: 24920 [2021-02-19 18:24:49,626 INFO L226 Difference]: Without dead ends: 16762 [2021-02-19 18:24:49,643 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 18:24:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16762 states. [2021-02-19 18:24:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16762 to 16760. [2021-02-19 18:24:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16760 states. [2021-02-19 18:24:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16760 states to 16760 states and 27017 transitions. [2021-02-19 18:24:50,470 INFO L78 Accepts]: Start accepts. Automaton has 16760 states and 27017 transitions. Word has length 500 [2021-02-19 18:24:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:50,471 INFO L480 AbstractCegarLoop]: Abstraction has 16760 states and 27017 transitions. [2021-02-19 18:24:50,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:24:50,471 INFO L276 IsEmpty]: Start isEmpty. Operand 16760 states and 27017 transitions. [2021-02-19 18:24:50,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2021-02-19 18:24:50,507 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:24:50,507 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] [2021-02-19 18:24:50,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 18:24:50,508 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:24:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:50,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1269065175, now seen corresponding path program 1 times [2021-02-19 18:24:50,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:50,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671893346] [2021-02-19 18:24:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:50,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:50,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:50,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:50,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:24:50,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:50,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:51,928 WARN L202 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-19 18:24:51,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:24:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:51,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:51,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:24:52,272 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 18:24:52,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671893346] [2021-02-19 18:24:52,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:24:52,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:24:52,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044243146] [2021-02-19 18:24:52,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:24:52,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:52,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:24:52,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:24:52,275 INFO L87 Difference]: Start difference. First operand 16760 states and 27017 transitions. Second operand 4 states. [2021-02-19 18:25:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:14,849 INFO L93 Difference]: Finished difference Result 50024 states and 80606 transitions. [2021-02-19 18:25:14,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:25:14,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2021-02-19 18:25:14,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:14,911 INFO L225 Difference]: With dead ends: 50024 [2021-02-19 18:25:14,911 INFO L226 Difference]: Without dead ends: 33408 [2021-02-19 18:25:14,947 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 18:25:14,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33408 states. [2021-02-19 18:25:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33408 to 16858. [2021-02-19 18:25:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16858 states. [2021-02-19 18:25:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16858 states to 16858 states and 27168 transitions. [2021-02-19 18:25:16,013 INFO L78 Accepts]: Start accepts. Automaton has 16858 states and 27168 transitions. Word has length 500 [2021-02-19 18:25:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:16,013 INFO L480 AbstractCegarLoop]: Abstraction has 16858 states and 27168 transitions. [2021-02-19 18:25:16,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:25:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 16858 states and 27168 transitions. [2021-02-19 18:25:16,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2021-02-19 18:25:16,050 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:25:16,051 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 18:25:16,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 18:25:16,051 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:25:16,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:16,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2056128520, now seen corresponding path program 1 times [2021-02-19 18:25:16,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:16,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99835940] [2021-02-19 18:25:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:16,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:16,285 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:16,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:16,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:25:16,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:16,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:17,495 WARN L202 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-19 18:25:17,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:25:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:17,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:17,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:17,868 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 18:25:17,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99835940] [2021-02-19 18:25:17,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:25:17,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:25:17,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160165981] [2021-02-19 18:25:17,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:25:17,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:17,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:25:17,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:25:17,871 INFO L87 Difference]: Start difference. First operand 16858 states and 27168 transitions. Second operand 4 states. [2021-02-19 18:25:41,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:41,109 INFO L93 Difference]: Finished difference Result 50159 states and 80787 transitions. [2021-02-19 18:25:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:25:41,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2021-02-19 18:25:41,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:41,170 INFO L225 Difference]: With dead ends: 50159 [2021-02-19 18:25:41,170 INFO L226 Difference]: Without dead ends: 33525 [2021-02-19 18:25:41,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:25:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33525 states. [2021-02-19 18:25:42,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33525 to 16975. [2021-02-19 18:25:42,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16975 states. [2021-02-19 18:25:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16975 states to 16975 states and 27314 transitions. [2021-02-19 18:25:42,278 INFO L78 Accepts]: Start accepts. Automaton has 16975 states and 27314 transitions. Word has length 501 [2021-02-19 18:25:42,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:42,279 INFO L480 AbstractCegarLoop]: Abstraction has 16975 states and 27314 transitions. [2021-02-19 18:25:42,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:25:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand 16975 states and 27314 transitions. [2021-02-19 18:25:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-02-19 18:25:42,311 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:25:42,312 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, 1] [2021-02-19 18:25:42,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 18:25:42,312 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:25:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:42,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1918901086, now seen corresponding path program 1 times [2021-02-19 18:25:42,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:42,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941424540] [2021-02-19 18:25:42,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:42,581 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:42,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:42,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:42,585 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:25:42,591 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:42,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:43,809 WARN L202 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-19 18:25:43,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:25:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:43,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:43,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:44,165 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 18:25:44,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941424540] [2021-02-19 18:25:44,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:25:44,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:25:44,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916100897] [2021-02-19 18:25:44,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:25:44,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:44,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:25:44,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:25:44,168 INFO L87 Difference]: Start difference. First operand 16975 states and 27314 transitions. Second operand 4 states. [2021-02-19 18:26:00,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:00,445 INFO L93 Difference]: Finished difference Result 36907 states and 58972 transitions. [2021-02-19 18:26:00,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:26:00,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2021-02-19 18:26:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:00,488 INFO L225 Difference]: With dead ends: 36907 [2021-02-19 18:26:00,488 INFO L226 Difference]: Without dead ends: 24449 [2021-02-19 18:26:00,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:26:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24449 states. [2021-02-19 18:26:01,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24449 to 20175. [2021-02-19 18:26:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20175 states. [2021-02-19 18:26:01,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20175 states to 20175 states and 32638 transitions. [2021-02-19 18:26:01,619 INFO L78 Accepts]: Start accepts. Automaton has 20175 states and 32638 transitions. Word has length 502 [2021-02-19 18:26:01,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:01,620 INFO L480 AbstractCegarLoop]: Abstraction has 20175 states and 32638 transitions. [2021-02-19 18:26:01,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:26:01,620 INFO L276 IsEmpty]: Start isEmpty. Operand 20175 states and 32638 transitions. [2021-02-19 18:26:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-02-19 18:26:01,643 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:26:01,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:01,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 18:26:01,644 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:26:01,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:01,645 INFO L82 PathProgramCache]: Analyzing trace with hash 258986204, now seen corresponding path program 1 times [2021-02-19 18:26:01,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:01,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559668247] [2021-02-19 18:26:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:02,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:02,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:26:02,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:02,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:26:02,608 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-19 18:26:02,611 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-19 18:26:02,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:02,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:26:02,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:02,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:26:03,893 WARN L202 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-19 18:26:03,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:26:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:03,915 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:03,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:26:04,386 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 18:26:04,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559668247] [2021-02-19 18:26:04,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:26:04,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:26:04,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904409815] [2021-02-19 18:26:04,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:26:04,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:04,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:26:04,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:26:04,390 INFO L87 Difference]: Start difference. First operand 20175 states and 32638 transitions. Second operand 6 states. [2021-02-19 18:26:24,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:24,521 INFO L93 Difference]: Finished difference Result 59219 states and 95795 transitions. [2021-02-19 18:26:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:26:24,522 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 502 [2021-02-19 18:26:24,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:24,571 INFO L225 Difference]: With dead ends: 59219 [2021-02-19 18:26:24,571 INFO L226 Difference]: Without dead ends: 39217 [2021-02-19 18:26:24,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:26:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39217 states. [2021-02-19 18:26:26,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39217 to 39215. [2021-02-19 18:26:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39215 states. [2021-02-19 18:26:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39215 states to 39215 states and 63174 transitions. [2021-02-19 18:26:26,755 INFO L78 Accepts]: Start accepts. Automaton has 39215 states and 63174 transitions. Word has length 502 [2021-02-19 18:26:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:26,756 INFO L480 AbstractCegarLoop]: Abstraction has 39215 states and 63174 transitions. [2021-02-19 18:26:26,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 18:26:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 39215 states and 63174 transitions. [2021-02-19 18:26:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-02-19 18:26:26,795 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:26:26,796 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, 1, 1, 1] [2021-02-19 18:26:26,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 18:26:26,796 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:26:26,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:26,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1508550229, now seen corresponding path program 1 times [2021-02-19 18:26:26,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:26,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284683495] [2021-02-19 18:26:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:27,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:27,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:26:27,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:27,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:26:27,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:27,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:26:28,360 WARN L202 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-19 18:26:28,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:26:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:28,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:28,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:26:29,110 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 18:26:29,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284683495] [2021-02-19 18:26:29,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:26:29,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:26:29,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97404351] [2021-02-19 18:26:29,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:26:29,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:29,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:26:29,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:26:29,113 INFO L87 Difference]: Start difference. First operand 39215 states and 63174 transitions. Second operand 4 states. [2021-02-19 18:26:56,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:56,019 INFO L93 Difference]: Finished difference Result 115372 states and 185708 transitions. [2021-02-19 18:26:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:26:56,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2021-02-19 18:26:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:56,123 INFO L225 Difference]: With dead ends: 115372 [2021-02-19 18:26:56,124 INFO L226 Difference]: Without dead ends: 77186 [2021-02-19 18:26:56,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:26:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77186 states. [2021-02-19 18:27:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77186 to 77184. [2021-02-19 18:27:00,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77184 states. [2021-02-19 18:27:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77184 states to 77184 states and 123876 transitions. [2021-02-19 18:27:00,216 INFO L78 Accepts]: Start accepts. Automaton has 77184 states and 123876 transitions. Word has length 504 [2021-02-19 18:27:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:00,217 INFO L480 AbstractCegarLoop]: Abstraction has 77184 states and 123876 transitions. [2021-02-19 18:27:00,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:27:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 77184 states and 123876 transitions. [2021-02-19 18:27:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-02-19 18:27:00,515 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:27:00,516 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, 1, 1, 1, 1, 1] [2021-02-19 18:27:00,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 18:27:00,517 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:27:00,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:00,518 INFO L82 PathProgramCache]: Analyzing trace with hash 592381264, now seen corresponding path program 1 times [2021-02-19 18:27:00,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:00,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548460041] [2021-02-19 18:27:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:00,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:00,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:27:00,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:00,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:27:00,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:00,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:27:02,308 WARN L202 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-19 18:27:02,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:27:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:02,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:02,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:27:02,683 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 18:27:02,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548460041] [2021-02-19 18:27:02,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:27:02,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:27:02,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703940792] [2021-02-19 18:27:02,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:27:02,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:02,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:27:02,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:27:02,686 INFO L87 Difference]: Start difference. First operand 77184 states and 123876 transitions. Second operand 4 states. [2021-02-19 18:27:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:32,947 INFO L93 Difference]: Finished difference Result 226462 states and 362877 transitions. [2021-02-19 18:27:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:27:32,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 506 [2021-02-19 18:27:32,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:33,158 INFO L225 Difference]: With dead ends: 226462 [2021-02-19 18:27:33,158 INFO L226 Difference]: Without dead ends: 151564 [2021-02-19 18:27:33,223 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 18:27:33,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151564 states. [2021-02-19 18:27:41,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151564 to 151562. [2021-02-19 18:27:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151562 states. [2021-02-19 18:27:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151562 states to 151562 states and 242193 transitions. [2021-02-19 18:27:41,799 INFO L78 Accepts]: Start accepts. Automaton has 151562 states and 242193 transitions. Word has length 506 [2021-02-19 18:27:41,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:41,800 INFO L480 AbstractCegarLoop]: Abstraction has 151562 states and 242193 transitions. [2021-02-19 18:27:41,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:27:41,800 INFO L276 IsEmpty]: Start isEmpty. Operand 151562 states and 242193 transitions. [2021-02-19 18:27:41,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-02-19 18:27:41,923 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:27:41,924 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, 1, 1, 1, 1, 1] [2021-02-19 18:27:41,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 18:27:41,924 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:27:41,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:41,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1760624621, now seen corresponding path program 1 times [2021-02-19 18:27:41,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:41,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156339325] [2021-02-19 18:27:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:43,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:43,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:27:43,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:43,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:27:43,028 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-19 18:27:43,030 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-19 18:27:43,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:43,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:27:43,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:43,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:27:44,385 WARN L202 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-19 18:27:44,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:27:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:44,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:44,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:27:44,838 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 18:27:44,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156339325] [2021-02-19 18:27:44,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:27:44,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:27:44,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803755600] [2021-02-19 18:27:44,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:27:44,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:44,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:27:44,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:27:44,848 INFO L87 Difference]: Start difference. First operand 151562 states and 242193 transitions. Second operand 6 states. [2021-02-19 18:28:18,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:18,154 INFO L93 Difference]: Finished difference Result 449758 states and 718681 transitions. [2021-02-19 18:28:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:28:18,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 506 [2021-02-19 18:28:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:18,810 INFO L225 Difference]: With dead ends: 449758 [2021-02-19 18:28:18,811 INFO L226 Difference]: Without dead ends: 298487 [2021-02-19 18:28:18,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:28:19,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298487 states. [2021-02-19 18:28:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298487 to 298485. [2021-02-19 18:28:36,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298485 states. [2021-02-19 18:28:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298485 states to 298485 states and 474962 transitions. [2021-02-19 18:28:37,085 INFO L78 Accepts]: Start accepts. Automaton has 298485 states and 474962 transitions. Word has length 506 [2021-02-19 18:28:37,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:37,087 INFO L480 AbstractCegarLoop]: Abstraction has 298485 states and 474962 transitions. [2021-02-19 18:28:37,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 18:28:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 298485 states and 474962 transitions. [2021-02-19 18:28:37,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2021-02-19 18:28:37,764 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:28:37,764 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:37,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 18:28:37,765 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:28:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:37,765 INFO L82 PathProgramCache]: Analyzing trace with hash 788630094, now seen corresponding path program 1 times [2021-02-19 18:28:37,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:37,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058274099] [2021-02-19 18:28:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:38,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:38,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:28:38,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:38,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:28:38,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:38,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:28:38,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:38,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:28:39,855 WARN L202 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-19 18:28:39,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:28:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:39,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:39,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:28:40,392 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 18:28:40,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058274099] [2021-02-19 18:28:40,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:28:40,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:28:40,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607769835] [2021-02-19 18:28:40,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:28:40,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:40,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:28:40,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:28:40,395 INFO L87 Difference]: Start difference. First operand 298485 states and 474962 transitions. Second operand 5 states. [2021-02-19 18:29:28,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:28,893 INFO L93 Difference]: Finished difference Result 886877 states and 1410660 transitions. [2021-02-19 18:29:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:29:28,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 508 [2021-02-19 18:29:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:30,185 INFO L225 Difference]: With dead ends: 886877 [2021-02-19 18:29:30,185 INFO L226 Difference]: Without dead ends: 589107 [2021-02-19 18:29:30,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:29:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589107 states.