/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.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:45:32,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:45:32,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:45:32,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:45:32,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:45:32,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:45:32,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:45:32,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:45:32,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:45:32,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:45:32,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:45:32,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:45:32,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:45:32,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:45:32,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:45:32,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:45:32,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:45:32,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:45:32,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:45:32,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:45:32,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:45:32,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:45:32,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:45:32,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:45:32,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 16:45:32,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 16:45:32,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 16:45:32,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 16:45:32,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 16:45:32,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 16:45:32,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 16:45:32,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 16:45:32,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 16:45:32,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 16:45:32,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 16:45:32,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 16:45:32,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 16:45:32,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 16:45:32,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:45:32,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:45:32,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:45:32,686 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 [2021-02-21 16:45:32,736 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:45:32,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:45:32,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:45:32,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:45:32,741 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:45:32,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:45:32,742 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:45:32,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:45:32,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:45:32,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:45:32,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:45:32,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:45:32,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:45:32,744 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:45:32,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:45:32,745 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:45:32,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:45:32,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:45:32,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:45:32,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:45:32,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:45:32,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:45:32,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:45:32,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:45:32,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:45:32,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:45:32,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:45:32,748 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:45:32,748 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:45:33,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:45:33,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:45:33,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:45:33,206 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:45:33,208 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:45:33,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-02-21 16:45:33,280 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c161a780/2e13222a3f274b16a3a4305c36ba8d01/FLAGe27b621e4 [2021-02-21 16:45:34,058 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:45:34,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-02-21 16:45:34,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c161a780/2e13222a3f274b16a3a4305c36ba8d01/FLAGe27b621e4 [2021-02-21 16:45:34,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c161a780/2e13222a3f274b16a3a4305c36ba8d01 [2021-02-21 16:45:34,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:45:34,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:45:34,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:45:34,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:45:34,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:45:34,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:45:34" (1/1) ... [2021-02-21 16:45:34,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cde91c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:45:34, skipping insertion in model container [2021-02-21 16:45:34,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:45:34" (1/1) ... [2021-02-21 16:45:34,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:45:34,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:45:35,077 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.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[34821,34834] [2021-02-21 16:45:35,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:45:35,328 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:45:35,633 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.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[34821,34834] [2021-02-21 16:45:35,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:45:35,799 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:45:35,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:45:35 WrapperNode [2021-02-21 16:45:35,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:45:35,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:45:35,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:45:35,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:45:35,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:45:35" (1/1) ... [2021-02-21 16:45:35,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:45:35" (1/1) ... [2021-02-21 16:45:35,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:45:35" (1/1) ... [2021-02-21 16:45:35,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:45:35" (1/1) ... [2021-02-21 16:45:35,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:45:35" (1/1) ... [2021-02-21 16:45:35,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:45:35" (1/1) ... [2021-02-21 16:45:35,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:45:35" (1/1) ... [2021-02-21 16:45:36,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:45:36,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:45:36,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:45:36,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:45:36,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:45:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:45:36,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:45:36,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:45:36,110 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:45:36,111 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 16:45:36,111 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:45:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:45:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:45:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:45:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:45:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-21 16:45:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-21 16:45:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-21 16:45:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 16:45:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-21 16:45:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-21 16:45:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-21 16:45:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-21 16:45:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-21 16:45:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-21 16:45:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-21 16:45:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-21 16:45:36,114 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:45:36,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:45:36,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:45:36,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:45:36,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:45:36,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:45:36,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:45:38,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:45:38,654 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:45:38,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:45:38 BoogieIcfgContainer [2021-02-21 16:45:38,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:45:38,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:45:38,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:45:38,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:45:38,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:45:34" (1/3) ... [2021-02-21 16:45:38,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428ca603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:45:38, skipping insertion in model container [2021-02-21 16:45:38,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:45:35" (2/3) ... [2021-02-21 16:45:38,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428ca603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:45:38, skipping insertion in model container [2021-02-21 16:45:38,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:45:38" (3/3) ... [2021-02-21 16:45:38,665 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-02-21 16:45:38,672 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:45:38,678 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:45:38,697 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:45:38,728 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:45:38,729 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:45:38,729 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:45:38,729 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:45:38,729 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:45:38,729 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:45:38,729 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:45:38,729 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:45:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2021-02-21 16:45:38,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-21 16:45:38,790 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:45:38,791 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] [2021-02-21 16:45:38,792 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:45:38,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:45:38,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1870510118, now seen corresponding path program 1 times [2021-02-21 16:45:38,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:45:38,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109933009] [2021-02-21 16:45:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:45:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:45:39,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:39,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:39,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:39,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:45:39,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:39,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:40,439 WARN L202 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:45:40,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:45:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:45:40,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:40,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:45:40,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109933009] [2021-02-21 16:45:40,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:45:40,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:45:40,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278361095] [2021-02-21 16:45:40,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:45:40,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:45:40,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:45:40,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:45:40,749 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2021-02-21 16:45:41,483 WARN L202 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2021-02-21 16:45:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:45:46,478 INFO L93 Difference]: Finished difference Result 1490 states and 2621 transitions. [2021-02-21 16:45:46,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:45:46,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2021-02-21 16:45:46,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:45:46,553 INFO L225 Difference]: With dead ends: 1490 [2021-02-21 16:45:46,553 INFO L226 Difference]: Without dead ends: 1284 [2021-02-21 16:45:46,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:45:46,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-02-21 16:45:46,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1282. [2021-02-21 16:45:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2021-02-21 16:45:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 2005 transitions. [2021-02-21 16:45:46,743 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 2005 transitions. Word has length 324 [2021-02-21 16:45:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:45:46,750 INFO L480 AbstractCegarLoop]: Abstraction has 1282 states and 2005 transitions. [2021-02-21 16:45:46,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:45:46,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 2005 transitions. [2021-02-21 16:45:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-21 16:45:46,770 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:45:46,771 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] [2021-02-21 16:45:46,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:45:46,772 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:45:46,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:45:46,774 INFO L82 PathProgramCache]: Analyzing trace with hash -127429012, now seen corresponding path program 1 times [2021-02-21 16:45:46,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:45:46,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469295216] [2021-02-21 16:45:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:45:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:45:47,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:47,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:47,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:47,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:45:47,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:47,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:47,936 WARN L202 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:45:47,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:45:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:45:47,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:47,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:45:48,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469295216] [2021-02-21 16:45:48,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:45:48,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:45:48,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209879528] [2021-02-21 16:45:48,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:45:48,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:45:48,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:45:48,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:45:48,138 INFO L87 Difference]: Start difference. First operand 1282 states and 2005 transitions. Second operand 4 states. [2021-02-21 16:45:48,838 WARN L202 SmtUtils]: Spent 627.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2021-02-21 16:45:53,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:45:53,077 INFO L93 Difference]: Finished difference Result 2612 states and 4118 transitions. [2021-02-21 16:45:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:45:53,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2021-02-21 16:45:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:45:53,092 INFO L225 Difference]: With dead ends: 2612 [2021-02-21 16:45:53,093 INFO L226 Difference]: Without dead ends: 2248 [2021-02-21 16:45:53,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:45:53,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-02-21 16:45:53,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2246. [2021-02-21 16:45:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2246 states. [2021-02-21 16:45:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 3507 transitions. [2021-02-21 16:45:53,174 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 3507 transitions. Word has length 324 [2021-02-21 16:45:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:45:53,175 INFO L480 AbstractCegarLoop]: Abstraction has 2246 states and 3507 transitions. [2021-02-21 16:45:53,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:45:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 3507 transitions. [2021-02-21 16:45:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-21 16:45:53,185 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:45:53,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:45:53,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:45:53,186 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:45:53,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:45:53,187 INFO L82 PathProgramCache]: Analyzing trace with hash -941789149, now seen corresponding path program 1 times [2021-02-21 16:45:53,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:45:53,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380135913] [2021-02-21 16:45:53,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:45:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:45:53,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:53,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:53,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:53,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:45:53,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:53,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:54,057 WARN L202 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:45:54,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:45:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:45:54,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:54,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:45:54,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380135913] [2021-02-21 16:45:54,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:45:54,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:45:54,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646921461] [2021-02-21 16:45:54,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:45:54,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:45:54,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:45:54,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:45:54,282 INFO L87 Difference]: Start difference. First operand 2246 states and 3507 transitions. Second operand 4 states. [2021-02-21 16:45:54,954 WARN L202 SmtUtils]: Spent 622.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2021-02-21 16:45:59,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:45:59,090 INFO L93 Difference]: Finished difference Result 4822 states and 7593 transitions. [2021-02-21 16:45:59,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:45:59,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2021-02-21 16:45:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:45:59,114 INFO L225 Difference]: With dead ends: 4822 [2021-02-21 16:45:59,114 INFO L226 Difference]: Without dead ends: 4140 [2021-02-21 16:45:59,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:45:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4140 states. [2021-02-21 16:45:59,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4140 to 4138. [2021-02-21 16:45:59,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4138 states. [2021-02-21 16:45:59,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 6447 transitions. [2021-02-21 16:45:59,259 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 6447 transitions. Word has length 324 [2021-02-21 16:45:59,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:45:59,260 INFO L480 AbstractCegarLoop]: Abstraction has 4138 states and 6447 transitions. [2021-02-21 16:45:59,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:45:59,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 6447 transitions. [2021-02-21 16:45:59,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-21 16:45:59,270 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:45:59,271 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] [2021-02-21 16:45:59,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:45:59,271 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:45:59,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:45:59,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1072121675, now seen corresponding path program 1 times [2021-02-21 16:45:59,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:45:59,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357673117] [2021-02-21 16:45:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:45:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:45:59,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:59,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:59,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:59,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:45:59,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:59,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:00,124 WARN L202 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:46:00,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:46:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:00,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:00,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:46:00,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357673117] [2021-02-21 16:46:00,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:46:00,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:46:00,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168174495] [2021-02-21 16:46:00,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:46:00,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:46:00,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:46:00,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:00,373 INFO L87 Difference]: Start difference. First operand 4138 states and 6447 transitions. Second operand 4 states. [2021-02-21 16:46:01,095 WARN L202 SmtUtils]: Spent 679.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2021-02-21 16:46:05,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:46:05,335 INFO L93 Difference]: Finished difference Result 9126 states and 14341 transitions. [2021-02-21 16:46:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:46:05,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2021-02-21 16:46:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:46:05,375 INFO L225 Difference]: With dead ends: 9126 [2021-02-21 16:46:05,375 INFO L226 Difference]: Without dead ends: 7852 [2021-02-21 16:46:05,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:46:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7852 states. [2021-02-21 16:46:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7852 to 7850. [2021-02-21 16:46:05,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7850 states. [2021-02-21 16:46:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7850 states to 7850 states and 12199 transitions. [2021-02-21 16:46:05,648 INFO L78 Accepts]: Start accepts. Automaton has 7850 states and 12199 transitions. Word has length 324 [2021-02-21 16:46:05,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:46:05,649 INFO L480 AbstractCegarLoop]: Abstraction has 7850 states and 12199 transitions. [2021-02-21 16:46:05,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:46:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 7850 states and 12199 transitions. [2021-02-21 16:46:05,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-21 16:46:05,667 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:46:05,668 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] [2021-02-21 16:46:05,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:46:05,668 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:46:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:46:05,669 INFO L82 PathProgramCache]: Analyzing trace with hash -247456284, now seen corresponding path program 1 times [2021-02-21 16:46:05,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:46:05,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622685202] [2021-02-21 16:46:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:46:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:06,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:06,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:06,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:06,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:46:06,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:06,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:46:06,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:06,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:06,991 WARN L202 SmtUtils]: Spent 617.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:46:06,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:46:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:07,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:07,017 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:46:07,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622685202] [2021-02-21 16:46:07,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:46:07,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:46:07,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777447371] [2021-02-21 16:46:07,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:46:07,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:46:07,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:46:07,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:46:07,244 INFO L87 Difference]: Start difference. First operand 7850 states and 12199 transitions. Second operand 5 states. [2021-02-21 16:46:14,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:46:14,240 INFO L93 Difference]: Finished difference Result 23223 states and 36054 transitions. [2021-02-21 16:46:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:46:14,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2021-02-21 16:46:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:46:14,303 INFO L225 Difference]: With dead ends: 23223 [2021-02-21 16:46:14,303 INFO L226 Difference]: Without dead ends: 15388 [2021-02-21 16:46:14,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:46:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15388 states. [2021-02-21 16:46:14,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15388 to 15386. [2021-02-21 16:46:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15386 states. [2021-02-21 16:46:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 23772 transitions. [2021-02-21 16:46:14,894 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 23772 transitions. Word has length 324 [2021-02-21 16:46:14,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:46:14,898 INFO L480 AbstractCegarLoop]: Abstraction has 15386 states and 23772 transitions. [2021-02-21 16:46:14,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:46:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 23772 transitions. [2021-02-21 16:46:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-21 16:46:14,924 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:46:14,924 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] [2021-02-21 16:46:14,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:46:14,925 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:46:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:46:14,926 INFO L82 PathProgramCache]: Analyzing trace with hash -41876105, now seen corresponding path program 1 times [2021-02-21 16:46:14,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:46:14,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934017523] [2021-02-21 16:46:14,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:46:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:15,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:15,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:15,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:15,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:46:15,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:15,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:15,782 WARN L202 SmtUtils]: Spent 589.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:46:15,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:46:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:15,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:15,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:46:15,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934017523] [2021-02-21 16:46:15,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:46:15,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:46:15,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807643183] [2021-02-21 16:46:15,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:46:15,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:46:15,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:46:15,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:15,969 INFO L87 Difference]: Start difference. First operand 15386 states and 23772 transitions. Second operand 4 states. [2021-02-21 16:46:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:46:24,116 INFO L93 Difference]: Finished difference Result 45419 states and 70072 transitions. [2021-02-21 16:46:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:46:24,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2021-02-21 16:46:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:46:24,184 INFO L225 Difference]: With dead ends: 45419 [2021-02-21 16:46:24,184 INFO L226 Difference]: Without dead ends: 30162 [2021-02-21 16:46:24,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30162 states. [2021-02-21 16:46:25,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30162 to 30160. [2021-02-21 16:46:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30160 states. [2021-02-21 16:46:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30160 states to 30160 states and 46321 transitions. [2021-02-21 16:46:25,314 INFO L78 Accepts]: Start accepts. Automaton has 30160 states and 46321 transitions. Word has length 326 [2021-02-21 16:46:25,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:46:25,314 INFO L480 AbstractCegarLoop]: Abstraction has 30160 states and 46321 transitions. [2021-02-21 16:46:25,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:46:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 30160 states and 46321 transitions. [2021-02-21 16:46:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-21 16:46:25,365 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:46:25,366 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] [2021-02-21 16:46:25,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:46:25,366 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:46:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:46:25,367 INFO L82 PathProgramCache]: Analyzing trace with hash -2104012548, now seen corresponding path program 1 times [2021-02-21 16:46:25,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:46:25,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684858601] [2021-02-21 16:46:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:46:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:25,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:25,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:25,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:25,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:46:25,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:25,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:26,209 WARN L202 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:46:26,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:46:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:26,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:26,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:46:26,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684858601] [2021-02-21 16:46:26,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:46:26,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:46:26,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424112584] [2021-02-21 16:46:26,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:46:26,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:46:26,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:46:26,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:26,331 INFO L87 Difference]: Start difference. First operand 30160 states and 46321 transitions. Second operand 4 states. [2021-02-21 16:46:35,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:46:35,092 INFO L93 Difference]: Finished difference Result 90405 states and 138839 transitions. [2021-02-21 16:46:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:46:35,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2021-02-21 16:46:35,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:46:35,219 INFO L225 Difference]: With dead ends: 90405 [2021-02-21 16:46:35,220 INFO L226 Difference]: Without dead ends: 60287 [2021-02-21 16:46:35,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:35,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60287 states. [2021-02-21 16:46:36,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60287 to 30179. [2021-02-21 16:46:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30179 states. [2021-02-21 16:46:36,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30179 states to 30179 states and 46349 transitions. [2021-02-21 16:46:36,691 INFO L78 Accepts]: Start accepts. Automaton has 30179 states and 46349 transitions. Word has length 326 [2021-02-21 16:46:36,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:46:36,691 INFO L480 AbstractCegarLoop]: Abstraction has 30179 states and 46349 transitions. [2021-02-21 16:46:36,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:46:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 30179 states and 46349 transitions. [2021-02-21 16:46:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-02-21 16:46:36,731 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:46:36,732 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] [2021-02-21 16:46:36,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 16:46:36,732 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:46:36,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:46:36,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1504278854, now seen corresponding path program 1 times [2021-02-21 16:46:36,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:46:36,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840633835] [2021-02-21 16:46:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:46:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:36,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:36,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:36,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:36,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:46:36,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:36,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:37,500 WARN L202 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:46:37,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:46:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:37,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:37,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:46:37,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840633835] [2021-02-21 16:46:37,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:46:37,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:46:37,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521894284] [2021-02-21 16:46:37,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:46:37,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:46:37,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:46:37,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:37,619 INFO L87 Difference]: Start difference. First operand 30179 states and 46349 transitions. Second operand 4 states. [2021-02-21 16:46:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:46:47,273 INFO L93 Difference]: Finished difference Result 90424 states and 138860 transitions. [2021-02-21 16:46:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:46:47,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2021-02-21 16:46:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:46:47,358 INFO L225 Difference]: With dead ends: 90424 [2021-02-21 16:46:47,358 INFO L226 Difference]: Without dead ends: 60305 [2021-02-21 16:46:47,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:47,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60305 states. [2021-02-21 16:46:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60305 to 30197. [2021-02-21 16:46:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30197 states. [2021-02-21 16:46:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30197 states to 30197 states and 46370 transitions. [2021-02-21 16:46:48,679 INFO L78 Accepts]: Start accepts. Automaton has 30197 states and 46370 transitions. Word has length 327 [2021-02-21 16:46:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:46:48,680 INFO L480 AbstractCegarLoop]: Abstraction has 30197 states and 46370 transitions. [2021-02-21 16:46:48,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:46:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 30197 states and 46370 transitions. [2021-02-21 16:46:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-02-21 16:46:48,703 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:46:48,703 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] [2021-02-21 16:46:48,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 16:46:48,703 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:46:48,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:46:48,704 INFO L82 PathProgramCache]: Analyzing trace with hash -247696078, now seen corresponding path program 1 times [2021-02-21 16:46:48,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:46:48,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800273015] [2021-02-21 16:46:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:46:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:48,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:48,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:48,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:48,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:46:48,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:48,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:49,707 WARN L202 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:46:49,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:46:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:49,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:49,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:46:49,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800273015] [2021-02-21 16:46:49,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:46:49,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:46:49,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994422261] [2021-02-21 16:46:49,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:46:49,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:46:49,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:46:49,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:49,939 INFO L87 Difference]: Start difference. First operand 30197 states and 46370 transitions. Second operand 4 states. [2021-02-21 16:46:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:46:59,467 INFO L93 Difference]: Finished difference Result 85716 states and 131393 transitions. [2021-02-21 16:46:59,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:46:59,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2021-02-21 16:46:59,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:46:59,536 INFO L225 Difference]: With dead ends: 85716 [2021-02-21 16:46:59,536 INFO L226 Difference]: Without dead ends: 55764 [2021-02-21 16:46:59,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:59,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55764 states. [2021-02-21 16:47:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55764 to 55762. [2021-02-21 16:47:01,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55762 states. [2021-02-21 16:47:01,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55762 states to 55762 states and 85028 transitions. [2021-02-21 16:47:01,882 INFO L78 Accepts]: Start accepts. Automaton has 55762 states and 85028 transitions. Word has length 328 [2021-02-21 16:47:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:47:01,883 INFO L480 AbstractCegarLoop]: Abstraction has 55762 states and 85028 transitions. [2021-02-21 16:47:01,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:47:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 55762 states and 85028 transitions. [2021-02-21 16:47:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-02-21 16:47:01,939 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:47:01,939 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] [2021-02-21 16:47:01,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 16:47:01,940 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:47:01,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:47:01,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1558324239, now seen corresponding path program 1 times [2021-02-21 16:47:01,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:47:01,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399241235] [2021-02-21 16:47:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:47:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:02,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:02,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:02,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:02,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:47:02,349 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-21 16:47:02,350 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-21 16:47:02,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:02,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:47:02,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:02,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:03,316 WARN L202 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:47:03,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:47:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:03,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:03,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:47:03,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399241235] [2021-02-21 16:47:03,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:47:03,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:47:03,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012589372] [2021-02-21 16:47:03,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:47:03,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:47:03,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:47:03,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:47:03,580 INFO L87 Difference]: Start difference. First operand 55762 states and 85028 transitions. Second operand 6 states. [2021-02-21 16:47:13,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:47:13,927 INFO L93 Difference]: Finished difference Result 164666 states and 250697 transitions. [2021-02-21 16:47:13,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:47:13,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 328 [2021-02-21 16:47:13,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:47:14,058 INFO L225 Difference]: With dead ends: 164666 [2021-02-21 16:47:14,058 INFO L226 Difference]: Without dead ends: 108963 [2021-02-21 16:47:14,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:47:14,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108963 states. [2021-02-21 16:47:18,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108963 to 108961. [2021-02-21 16:47:18,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108961 states. [2021-02-21 16:47:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108961 states to 108961 states and 164963 transitions. [2021-02-21 16:47:18,860 INFO L78 Accepts]: Start accepts. Automaton has 108961 states and 164963 transitions. Word has length 328 [2021-02-21 16:47:18,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:47:18,860 INFO L480 AbstractCegarLoop]: Abstraction has 108961 states and 164963 transitions. [2021-02-21 16:47:18,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:47:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand 108961 states and 164963 transitions. [2021-02-21 16:47:19,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-21 16:47:19,195 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:47:19,195 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] [2021-02-21 16:47:19,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 16:47:19,196 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:47:19,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:47:19,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1621319205, now seen corresponding path program 1 times [2021-02-21 16:47:19,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:47:19,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481490128] [2021-02-21 16:47:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:47:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:19,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:19,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:19,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:19,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:47:19,543 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-21 16:47:19,544 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-21 16:47:19,561 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:19,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:47:19,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:19,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:20,325 WARN L202 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:47:20,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:47:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:20,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:20,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:47:20,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481490128] [2021-02-21 16:47:20,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:47:20,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:47:20,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319446283] [2021-02-21 16:47:20,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:47:20,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:47:20,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:47:20,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:47:20,580 INFO L87 Difference]: Start difference. First operand 108961 states and 164963 transitions. Second operand 6 states. [2021-02-21 16:47:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:47:35,203 INFO L93 Difference]: Finished difference Result 321740 states and 486222 transitions. [2021-02-21 16:47:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:47:35,204 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 330 [2021-02-21 16:47:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:47:35,508 INFO L225 Difference]: With dead ends: 321740 [2021-02-21 16:47:35,508 INFO L226 Difference]: Without dead ends: 212900 [2021-02-21 16:47:35,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:47:35,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212900 states. [2021-02-21 16:47:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212900 to 212898. [2021-02-21 16:47:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212898 states. [2021-02-21 16:47:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212898 states to 212898 states and 319812 transitions. [2021-02-21 16:47:45,522 INFO L78 Accepts]: Start accepts. Automaton has 212898 states and 319812 transitions. Word has length 330 [2021-02-21 16:47:45,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:47:45,523 INFO L480 AbstractCegarLoop]: Abstraction has 212898 states and 319812 transitions. [2021-02-21 16:47:45,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:47:45,523 INFO L276 IsEmpty]: Start isEmpty. Operand 212898 states and 319812 transitions. [2021-02-21 16:47:46,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-21 16:47:46,076 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:47:46,077 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] [2021-02-21 16:47:46,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 16:47:46,077 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:47:46,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:47:46,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1045470557, now seen corresponding path program 1 times [2021-02-21 16:47:46,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:47:46,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135542171] [2021-02-21 16:47:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:47:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:46,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:46,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:46,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:46,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:47:46,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:46,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:47:46,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:46,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:47,330 WARN L202 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:47:47,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:47:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:47,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:47,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:47:47,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135542171] [2021-02-21 16:47:47,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:47:47,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:47:47,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318191820] [2021-02-21 16:47:47,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:47:47,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:47:47,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:47:47,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:47:47,551 INFO L87 Difference]: Start difference. First operand 212898 states and 319812 transitions. Second operand 5 states. [2021-02-21 16:48:10,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:48:10,961 INFO L93 Difference]: Finished difference Result 629292 states and 943769 transitions. [2021-02-21 16:48:10,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:48:10,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2021-02-21 16:48:10,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:48:11,812 INFO L225 Difference]: With dead ends: 629292 [2021-02-21 16:48:11,812 INFO L226 Difference]: Without dead ends: 416628 [2021-02-21 16:48:11,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:48:12,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416628 states. [2021-02-21 16:48:31,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416628 to 416626. [2021-02-21 16:48:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416626 states. [2021-02-21 16:48:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416626 states to 416626 states and 621252 transitions. [2021-02-21 16:48:32,817 INFO L78 Accepts]: Start accepts. Automaton has 416626 states and 621252 transitions. Word has length 330 [2021-02-21 16:48:32,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:48:32,818 INFO L480 AbstractCegarLoop]: Abstraction has 416626 states and 621252 transitions. [2021-02-21 16:48:32,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:48:32,818 INFO L276 IsEmpty]: Start isEmpty. Operand 416626 states and 621252 transitions. [2021-02-21 16:48:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-02-21 16:48:33,157 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:48:33,157 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] [2021-02-21 16:48:33,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 16:48:33,157 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:48:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:48:33,158 INFO L82 PathProgramCache]: Analyzing trace with hash 146928749, now seen corresponding path program 1 times [2021-02-21 16:48:33,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:48:33,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174532894] [2021-02-21 16:48:33,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:48:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:33,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:33,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:33,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:33,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:48:33,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:33,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:34,323 WARN L202 SmtUtils]: Spent 987.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:48:34,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:48:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:34,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:34,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:48:34,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174532894] [2021-02-21 16:48:34,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:48:34,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:48:34,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696744965] [2021-02-21 16:48:34,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:48:34,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:48:34,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:48:34,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:48:34,490 INFO L87 Difference]: Start difference. First operand 416626 states and 621252 transitions. Second operand 4 states.