/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:43:21,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:43:21,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:43:21,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:43:21,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:43:21,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:43:21,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:43:21,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:43:21,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:43:21,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:43:21,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:43:21,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:43:21,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:43:21,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:43:21,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:43:21,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:43:21,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:43:21,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:43:21,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:43:21,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:43:21,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:43:21,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:43:21,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:43:21,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:43:21,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:43:21,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:43:21,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:43:21,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:43:21,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:43:21,881 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:43:21,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:43:21,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:43:21,884 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:43:21,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:43:21,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:43:21,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:43:21,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:43:21,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:43:21,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:43:21,886 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:43:21,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:43:21,887 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:43:21,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:43:21,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:43:21,888 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:43:21,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:43:21,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:43:21,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:43:21,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:43:21,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:43:21,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:43:21,890 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:43:22,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:43:22,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:43:22,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:43:22,295 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:43:22,296 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:43:22,297 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2021-02-21 21:43:22,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e03bd081/b809c567abea48caa1859af94f1dccd7/FLAG36015e90f [2021-02-21 21:43:23,193 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:43:23,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2021-02-21 21:43:23,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e03bd081/b809c567abea48caa1859af94f1dccd7/FLAG36015e90f [2021-02-21 21:43:23,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e03bd081/b809c567abea48caa1859af94f1dccd7 [2021-02-21 21:43:23,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:43:23,501 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:43:23,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:43:23,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:43:23,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:43:23,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:43:23" (1/1) ... [2021-02-21 21:43:23,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2982fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:43:23, skipping insertion in model container [2021-02-21 21:43:23,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:43:23" (1/1) ... [2021-02-21 21:43:23,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:43:23,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:43:23,965 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[13594,13607] [2021-02-21 21:43:24,000 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[14241,14254] [2021-02-21 21:43:24,039 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15474,15487] [2021-02-21 21:43:24,067 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[16534,16547] [2021-02-21 21:43:24,240 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[24925,24938] [2021-02-21 21:43:24,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:43:24,389 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:43:24,503 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[13594,13607] [2021-02-21 21:43:24,510 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[14241,14254] [2021-02-21 21:43:24,520 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15474,15487] [2021-02-21 21:43:24,529 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[16534,16547] [2021-02-21 21:43:24,595 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[24925,24938] [2021-02-21 21:43:24,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:43:24,653 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:43:24,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:43:24 WrapperNode [2021-02-21 21:43:24,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:43:24,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:43:24,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:43:24,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:43:24,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:43:24" (1/1) ... [2021-02-21 21:43:24,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:43:24" (1/1) ... [2021-02-21 21:43:24,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:43:24" (1/1) ... [2021-02-21 21:43:24,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:43:24" (1/1) ... [2021-02-21 21:43:24,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:43:24" (1/1) ... [2021-02-21 21:43:24,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:43:24" (1/1) ... [2021-02-21 21:43:24,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:43:24" (1/1) ... [2021-02-21 21:43:24,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:43:24,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:43:24,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:43:24,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:43:24,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:43:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:43:24,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:43:24,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:43:24,940 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:43:24,940 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:43:24,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:43:24,941 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:43:24,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:43:24,944 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:43:24,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:43:24,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-21 21:43:24,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-21 21:43:24,945 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-21 21:43:24,945 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:43:24,945 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-21 21:43:24,945 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-21 21:43:24,945 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-21 21:43:24,946 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-21 21:43:24,946 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-21 21:43:24,946 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-21 21:43:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-21 21:43:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:43:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:43:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:43:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:43:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:43:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:43:24,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:43:26,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:43:26,658 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 21:43:26,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:43:26 BoogieIcfgContainer [2021-02-21 21:43:26,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:43:26,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:43:26,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:43:26,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:43:26,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:43:23" (1/3) ... [2021-02-21 21:43:26,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e76f044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:43:26, skipping insertion in model container [2021-02-21 21:43:26,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:43:24" (2/3) ... [2021-02-21 21:43:26,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e76f044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:43:26, skipping insertion in model container [2021-02-21 21:43:26,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:43:26" (3/3) ... [2021-02-21 21:43:26,671 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2021-02-21 21:43:26,678 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:43:26,683 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2021-02-21 21:43:26,703 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-02-21 21:43:26,728 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:43:26,728 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:43:26,729 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:43:26,729 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:43:26,729 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:43:26,729 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:43:26,729 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:43:26,729 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:43:26,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states. [2021-02-21 21:43:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2021-02-21 21:43:26,809 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:43:26,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:43:26,811 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:43:26,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:43:26,822 INFO L82 PathProgramCache]: Analyzing trace with hash -966048575, now seen corresponding path program 1 times [2021-02-21 21:43:26,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:43:26,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349842268] [2021-02-21 21:43:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:43:26,933 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:43:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:43:27,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:27,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:27,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:27,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:43:27,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:27,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:27,935 WARN L202 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2021-02-21 21:43:27,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:43:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:43:27,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:27,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:43:28,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349842268] [2021-02-21 21:43:28,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:43:28,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:43:28,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112035725] [2021-02-21 21:43:28,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:43:28,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:43:28,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:43:28,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:43:28,349 INFO L87 Difference]: Start difference. First operand 1135 states. Second operand 4 states. [2021-02-21 21:43:32,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:43:32,502 INFO L93 Difference]: Finished difference Result 1841 states and 2368 transitions. [2021-02-21 21:43:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:43:32,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 431 [2021-02-21 21:43:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:43:32,542 INFO L225 Difference]: With dead ends: 1841 [2021-02-21 21:43:32,543 INFO L226 Difference]: Without dead ends: 1311 [2021-02-21 21:43:32,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:43:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-02-21 21:43:32,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1304. [2021-02-21 21:43:32,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2021-02-21 21:43:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1553 transitions. [2021-02-21 21:43:32,784 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1553 transitions. Word has length 431 [2021-02-21 21:43:32,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:43:32,786 INFO L480 AbstractCegarLoop]: Abstraction has 1304 states and 1553 transitions. [2021-02-21 21:43:32,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:43:32,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1553 transitions. [2021-02-21 21:43:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2021-02-21 21:43:32,795 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:43:32,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:43:32,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:43:32,797 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:43:32,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:43:32,798 INFO L82 PathProgramCache]: Analyzing trace with hash 276539329, now seen corresponding path program 1 times [2021-02-21 21:43:32,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:43:32,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372878718] [2021-02-21 21:43:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:43:32,805 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:43:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:43:33,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:33,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:33,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:33,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:43:33,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:33,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:33,448 WARN L202 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2021-02-21 21:43:33,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:43:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:43:33,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:33,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:43:33,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372878718] [2021-02-21 21:43:33,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:43:33,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:43:33,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851707209] [2021-02-21 21:43:33,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:43:33,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:43:33,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:43:33,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:43:33,783 INFO L87 Difference]: Start difference. First operand 1304 states and 1553 transitions. Second operand 4 states. [2021-02-21 21:43:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:43:37,329 INFO L93 Difference]: Finished difference Result 2368 states and 2917 transitions. [2021-02-21 21:43:37,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:43:37,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 431 [2021-02-21 21:43:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:43:37,344 INFO L225 Difference]: With dead ends: 2368 [2021-02-21 21:43:37,344 INFO L226 Difference]: Without dead ends: 1928 [2021-02-21 21:43:37,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:43:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-02-21 21:43:37,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1916. [2021-02-21 21:43:37,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2021-02-21 21:43:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2337 transitions. [2021-02-21 21:43:37,468 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2337 transitions. Word has length 431 [2021-02-21 21:43:37,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:43:37,469 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 2337 transitions. [2021-02-21 21:43:37,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:43:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2337 transitions. [2021-02-21 21:43:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2021-02-21 21:43:37,480 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:43:37,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:43:37,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:43:37,481 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:43:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:43:37,482 INFO L82 PathProgramCache]: Analyzing trace with hash -525678495, now seen corresponding path program 1 times [2021-02-21 21:43:37,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:43:37,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318257183] [2021-02-21 21:43:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:43:37,487 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:43:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:43:37,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:37,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:37,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:37,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:43:37,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:37,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:37,916 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2021-02-21 21:43:37,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:43:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:43:37,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:37,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:43:38,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318257183] [2021-02-21 21:43:38,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:43:38,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:43:38,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004810609] [2021-02-21 21:43:38,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:43:38,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:43:38,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:43:38,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:43:38,262 INFO L87 Difference]: Start difference. First operand 1916 states and 2337 transitions. Second operand 4 states. [2021-02-21 21:43:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:43:41,388 INFO L93 Difference]: Finished difference Result 3846 states and 4840 transitions. [2021-02-21 21:43:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:43:41,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 431 [2021-02-21 21:43:41,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:43:41,408 INFO L225 Difference]: With dead ends: 3846 [2021-02-21 21:43:41,408 INFO L226 Difference]: Without dead ends: 3158 [2021-02-21 21:43:41,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:43:41,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3158 states. [2021-02-21 21:43:41,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3158 to 3136. [2021-02-21 21:43:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3136 states. [2021-02-21 21:43:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3136 states to 3136 states and 3901 transitions. [2021-02-21 21:43:41,603 INFO L78 Accepts]: Start accepts. Automaton has 3136 states and 3901 transitions. Word has length 431 [2021-02-21 21:43:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:43:41,604 INFO L480 AbstractCegarLoop]: Abstraction has 3136 states and 3901 transitions. [2021-02-21 21:43:41,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:43:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3136 states and 3901 transitions. [2021-02-21 21:43:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2021-02-21 21:43:41,618 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:43:41,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:43:41,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:43:41,619 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:43:41,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:43:41,620 INFO L82 PathProgramCache]: Analyzing trace with hash -820621855, now seen corresponding path program 1 times [2021-02-21 21:43:41,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:43:41,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922297234] [2021-02-21 21:43:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:43:41,624 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:43:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:43:41,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:41,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:41,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:41,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:43:41,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:41,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:43:41,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:41,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:42,238 WARN L202 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2021-02-21 21:43:42,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:43:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:43:42,266 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:42,267 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:43:42,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922297234] [2021-02-21 21:43:42,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:43:42,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:43:42,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685992697] [2021-02-21 21:43:42,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:43:42,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:43:42,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:43:42,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:43:42,527 INFO L87 Difference]: Start difference. First operand 3136 states and 3901 transitions. Second operand 5 states. [2021-02-21 21:43:48,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:43:48,168 INFO L93 Difference]: Finished difference Result 8853 states and 11082 transitions. [2021-02-21 21:43:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:43:48,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 431 [2021-02-21 21:43:48,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:43:48,198 INFO L225 Difference]: With dead ends: 8853 [2021-02-21 21:43:48,199 INFO L226 Difference]: Without dead ends: 5908 [2021-02-21 21:43:48,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:43:48,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2021-02-21 21:43:48,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 5764. [2021-02-21 21:43:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5764 states. [2021-02-21 21:43:48,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5764 states to 5764 states and 7193 transitions. [2021-02-21 21:43:48,615 INFO L78 Accepts]: Start accepts. Automaton has 5764 states and 7193 transitions. Word has length 431 [2021-02-21 21:43:48,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:43:48,616 INFO L480 AbstractCegarLoop]: Abstraction has 5764 states and 7193 transitions. [2021-02-21 21:43:48,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:43:48,616 INFO L276 IsEmpty]: Start isEmpty. Operand 5764 states and 7193 transitions. [2021-02-21 21:43:48,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2021-02-21 21:43:48,633 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:43:48,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:43:48,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:43:48,634 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:43:48,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:43:48,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1775729205, now seen corresponding path program 1 times [2021-02-21 21:43:48,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:43:48,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809961976] [2021-02-21 21:43:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:43:48,639 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:43:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:43:48,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:48,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:48,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:48,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:43:48,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:48,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:49,026 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2021-02-21 21:43:49,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:43:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:43:49,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:49,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:43:49,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809961976] [2021-02-21 21:43:49,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:43:49,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:43:49,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096965326] [2021-02-21 21:43:49,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:43:49,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:43:49,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:43:49,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:43:49,252 INFO L87 Difference]: Start difference. First operand 5764 states and 7193 transitions. Second operand 4 states. [2021-02-21 21:43:54,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:43:54,925 INFO L93 Difference]: Finished difference Result 16873 states and 21136 transitions. [2021-02-21 21:43:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:43:54,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 432 [2021-02-21 21:43:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:43:54,977 INFO L225 Difference]: With dead ends: 16873 [2021-02-21 21:43:54,978 INFO L226 Difference]: Without dead ends: 11334 [2021-02-21 21:43:54,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:43:55,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11334 states. [2021-02-21 21:43:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11334 to 5766. [2021-02-21 21:43:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5766 states. [2021-02-21 21:43:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5766 states to 5766 states and 7195 transitions. [2021-02-21 21:43:55,549 INFO L78 Accepts]: Start accepts. Automaton has 5766 states and 7195 transitions. Word has length 432 [2021-02-21 21:43:55,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:43:55,550 INFO L480 AbstractCegarLoop]: Abstraction has 5766 states and 7195 transitions. [2021-02-21 21:43:55,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:43:55,550 INFO L276 IsEmpty]: Start isEmpty. Operand 5766 states and 7195 transitions. [2021-02-21 21:43:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-02-21 21:43:55,567 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:43:55,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:43:55,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:43:55,568 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:43:55,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:43:55,569 INFO L82 PathProgramCache]: Analyzing trace with hash -890102780, now seen corresponding path program 1 times [2021-02-21 21:43:55,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:43:55,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879252690] [2021-02-21 21:43:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:43:55,573 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:43:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:43:55,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:55,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:55,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:55,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:43:55,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:55,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:56,013 WARN L202 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2021-02-21 21:43:56,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:43:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:43:56,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:43:56,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:43:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:43:56,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879252690] [2021-02-21 21:43:56,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:43:56,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:43:56,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953433002] [2021-02-21 21:43:56,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:43:56,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:43:56,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:43:56,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:43:56,275 INFO L87 Difference]: Start difference. First operand 5766 states and 7195 transitions. Second operand 4 states. [2021-02-21 21:44:01,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:44:01,520 INFO L93 Difference]: Finished difference Result 15146 states and 18944 transitions. [2021-02-21 21:44:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:44:01,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 433 [2021-02-21 21:44:01,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:44:01,559 INFO L225 Difference]: With dead ends: 15146 [2021-02-21 21:44:01,559 INFO L226 Difference]: Without dead ends: 9814 [2021-02-21 21:44:01,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:44:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9814 states. [2021-02-21 21:44:02,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9814 to 9670. [2021-02-21 21:44:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9670 states. [2021-02-21 21:44:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9670 states to 9670 states and 12026 transitions. [2021-02-21 21:44:02,274 INFO L78 Accepts]: Start accepts. Automaton has 9670 states and 12026 transitions. Word has length 433 [2021-02-21 21:44:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:44:02,275 INFO L480 AbstractCegarLoop]: Abstraction has 9670 states and 12026 transitions. [2021-02-21 21:44:02,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:44:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 9670 states and 12026 transitions. [2021-02-21 21:44:02,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-02-21 21:44:02,292 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:44:02,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:44:02,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:44:02,293 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:44:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:44:02,293 INFO L82 PathProgramCache]: Analyzing trace with hash 519462020, now seen corresponding path program 1 times [2021-02-21 21:44:02,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:44:02,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621296113] [2021-02-21 21:44:02,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:44:02,297 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:44:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:02,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:02,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:02,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:02,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:44:02,485 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-21 21:44:02,486 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-21 21:44:02,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:02,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:44:02,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:02,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:02,774 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2021-02-21 21:44:02,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:44:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:02,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:02,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:44:03,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621296113] [2021-02-21 21:44:03,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:44:03,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:44:03,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393432521] [2021-02-21 21:44:03,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:44:03,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:44:03,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:44:03,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:44:03,038 INFO L87 Difference]: Start difference. First operand 9670 states and 12026 transitions. Second operand 6 states. [2021-02-21 21:44:09,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:44:09,100 INFO L93 Difference]: Finished difference Result 27709 states and 34490 transitions. [2021-02-21 21:44:09,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:44:09,105 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 433 [2021-02-21 21:44:09,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:44:09,146 INFO L225 Difference]: With dead ends: 27709 [2021-02-21 21:44:09,146 INFO L226 Difference]: Without dead ends: 18235 [2021-02-21 21:44:09,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:44:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18235 states. [2021-02-21 21:44:10,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18235 to 18112. [2021-02-21 21:44:10,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18112 states. [2021-02-21 21:44:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18112 states to 18112 states and 22414 transitions. [2021-02-21 21:44:10,458 INFO L78 Accepts]: Start accepts. Automaton has 18112 states and 22414 transitions. Word has length 433 [2021-02-21 21:44:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:44:10,459 INFO L480 AbstractCegarLoop]: Abstraction has 18112 states and 22414 transitions. [2021-02-21 21:44:10,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:44:10,459 INFO L276 IsEmpty]: Start isEmpty. Operand 18112 states and 22414 transitions. [2021-02-21 21:44:10,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-02-21 21:44:10,582 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:44:10,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:44:10,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:44:10,583 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:44:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:44:10,584 INFO L82 PathProgramCache]: Analyzing trace with hash 602210547, now seen corresponding path program 1 times [2021-02-21 21:44:10,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:44:10,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934067074] [2021-02-21 21:44:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:44:10,588 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:44:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:10,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:10,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:10,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:10,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:44:10,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:10,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:44:10,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:10,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:11,217 WARN L202 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2021-02-21 21:44:11,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:44:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:11,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:11,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:44:11,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934067074] [2021-02-21 21:44:11,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:44:11,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:44:11,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101674619] [2021-02-21 21:44:11,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:44:11,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:44:11,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:44:11,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:44:11,459 INFO L87 Difference]: Start difference. First operand 18112 states and 22414 transitions. Second operand 5 states. [2021-02-21 21:44:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:44:19,464 INFO L93 Difference]: Finished difference Result 52635 states and 65113 transitions. [2021-02-21 21:44:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:44:19,465 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 433 [2021-02-21 21:44:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:44:19,550 INFO L225 Difference]: With dead ends: 52635 [2021-02-21 21:44:19,551 INFO L226 Difference]: Without dead ends: 34794 [2021-02-21 21:44:19,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:44:19,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34794 states. [2021-02-21 21:44:22,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34794 to 34636. [2021-02-21 21:44:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34636 states. [2021-02-21 21:44:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34636 states to 34636 states and 42593 transitions. [2021-02-21 21:44:22,410 INFO L78 Accepts]: Start accepts. Automaton has 34636 states and 42593 transitions. Word has length 433 [2021-02-21 21:44:22,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:44:22,411 INFO L480 AbstractCegarLoop]: Abstraction has 34636 states and 42593 transitions. [2021-02-21 21:44:22,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:44:22,411 INFO L276 IsEmpty]: Start isEmpty. Operand 34636 states and 42593 transitions. [2021-02-21 21:44:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-02-21 21:44:22,457 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:44:22,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:44:22,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 21:44:22,458 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:44:22,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:44:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1671182647, now seen corresponding path program 1 times [2021-02-21 21:44:22,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:44:22,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292088137] [2021-02-21 21:44:22,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:44:22,463 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:44:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:22,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:22,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:22,561 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:22,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:44:22,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:22,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:22,865 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2021-02-21 21:44:22,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:44:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:22,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:22,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:44:23,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292088137] [2021-02-21 21:44:23,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:44:23,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:44:23,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945605937] [2021-02-21 21:44:23,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:44:23,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:44:23,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:44:23,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:44:23,353 INFO L87 Difference]: Start difference. First operand 34636 states and 42593 transitions. Second operand 4 states. [2021-02-21 21:44:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:44:34,660 INFO L93 Difference]: Finished difference Result 103301 states and 127091 transitions. [2021-02-21 21:44:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:44:34,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 434 [2021-02-21 21:44:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:44:34,787 INFO L225 Difference]: With dead ends: 103301 [2021-02-21 21:44:34,787 INFO L226 Difference]: Without dead ends: 68986 [2021-02-21 21:44:34,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:44:34,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68986 states. [2021-02-21 21:44:38,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68986 to 34646. [2021-02-21 21:44:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34646 states. [2021-02-21 21:44:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34646 states to 34646 states and 42603 transitions. [2021-02-21 21:44:38,706 INFO L78 Accepts]: Start accepts. Automaton has 34646 states and 42603 transitions. Word has length 434 [2021-02-21 21:44:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:44:38,706 INFO L480 AbstractCegarLoop]: Abstraction has 34646 states and 42603 transitions. [2021-02-21 21:44:38,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:44:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 34646 states and 42603 transitions. [2021-02-21 21:44:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-02-21 21:44:38,934 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:44:38,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:44:38,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 21:44:38,935 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:44:38,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:44:38,935 INFO L82 PathProgramCache]: Analyzing trace with hash 115756502, now seen corresponding path program 1 times [2021-02-21 21:44:38,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:44:38,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36194368] [2021-02-21 21:44:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:44:38,939 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:44:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:39,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:39,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:39,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:39,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:44:39,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:39,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:39,379 WARN L202 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2021-02-21 21:44:39,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:44:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:39,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:39,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:44:39,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36194368] [2021-02-21 21:44:39,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:44:39,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:44:39,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767453897] [2021-02-21 21:44:39,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:44:39,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:44:39,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:44:39,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:44:39,604 INFO L87 Difference]: Start difference. First operand 34646 states and 42603 transitions. Second operand 4 states. [2021-02-21 21:44:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:44:49,845 INFO L93 Difference]: Finished difference Result 92028 states and 112996 transitions. [2021-02-21 21:44:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:44:49,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 435 [2021-02-21 21:44:49,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:44:49,923 INFO L225 Difference]: With dead ends: 92028 [2021-02-21 21:44:49,923 INFO L226 Difference]: Without dead ends: 58730 [2021-02-21 21:44:49,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:44:50,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58730 states. [2021-02-21 21:44:55,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58730 to 58572. [2021-02-21 21:44:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58572 states. [2021-02-21 21:44:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58572 states to 58572 states and 71312 transitions. [2021-02-21 21:44:55,807 INFO L78 Accepts]: Start accepts. Automaton has 58572 states and 71312 transitions. Word has length 435 [2021-02-21 21:44:55,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:44:55,808 INFO L480 AbstractCegarLoop]: Abstraction has 58572 states and 71312 transitions. [2021-02-21 21:44:55,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:44:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 58572 states and 71312 transitions. [2021-02-21 21:44:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-02-21 21:44:55,841 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:44:55,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:44:55,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 21:44:55,842 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:44:55,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:44:55,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1052447146, now seen corresponding path program 1 times [2021-02-21 21:44:55,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:44:55,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943993460] [2021-02-21 21:44:55,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:44:55,846 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:44:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:56,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:56,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:56,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:56,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:44:56,021 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-21 21:44:56,023 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-21 21:44:56,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:56,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:44:56,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:56,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:56,329 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2021-02-21 21:44:56,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:44:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:44:56,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:44:56,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:44:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:44:56,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943993460] [2021-02-21 21:44:56,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:44:56,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:44:56,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306894623] [2021-02-21 21:44:56,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:44:56,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:44:56,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:44:56,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:44:56,913 INFO L87 Difference]: Start difference. First operand 58572 states and 71312 transitions. Second operand 6 states. [2021-02-21 21:45:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:45:12,284 INFO L93 Difference]: Finished difference Result 156608 states and 190208 transitions. [2021-02-21 21:45:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:45:12,284 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 435 [2021-02-21 21:45:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:45:12,419 INFO L225 Difference]: With dead ends: 156608 [2021-02-21 21:45:12,420 INFO L226 Difference]: Without dead ends: 98333 [2021-02-21 21:45:12,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:45:12,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98333 states. [2021-02-21 21:45:23,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98333 to 98219. [2021-02-21 21:45:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98219 states. [2021-02-21 21:45:23,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98219 states to 98219 states and 118222 transitions. [2021-02-21 21:45:23,421 INFO L78 Accepts]: Start accepts. Automaton has 98219 states and 118222 transitions. Word has length 435 [2021-02-21 21:45:23,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:45:23,422 INFO L480 AbstractCegarLoop]: Abstraction has 98219 states and 118222 transitions. [2021-02-21 21:45:23,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:45:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 98219 states and 118222 transitions. [2021-02-21 21:45:23,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-02-21 21:45:23,697 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:45:23,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:45:23,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 21:45:23,698 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:45:23,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:45:23,698 INFO L82 PathProgramCache]: Analyzing trace with hash 964094813, now seen corresponding path program 1 times [2021-02-21 21:45:23,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:45:23,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836613341] [2021-02-21 21:45:23,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:45:23,702 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:45:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:45:23,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:23,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:23,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:23,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:45:23,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:23,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:45:23,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:23,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:24,170 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2021-02-21 21:45:24,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:45:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:45:24,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:24,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:45:24,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836613341] [2021-02-21 21:45:24,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:45:24,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:45:24,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293475946] [2021-02-21 21:45:24,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:45:24,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:45:24,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:45:24,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:45:24,532 INFO L87 Difference]: Start difference. First operand 98219 states and 118222 transitions. Second operand 5 states. [2021-02-21 21:45:41,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:45:41,505 INFO L93 Difference]: Finished difference Result 196944 states and 236986 transitions. [2021-02-21 21:45:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:45:41,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 435 [2021-02-21 21:45:41,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:45:41,663 INFO L225 Difference]: With dead ends: 196944 [2021-02-21 21:45:41,663 INFO L226 Difference]: Without dead ends: 99503 [2021-02-21 21:45:41,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:45:41,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99503 states. [2021-02-21 21:45:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99503 to 98781. [2021-02-21 21:45:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98781 states. [2021-02-21 21:45:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98781 states to 98781 states and 118831 transitions. [2021-02-21 21:45:53,790 INFO L78 Accepts]: Start accepts. Automaton has 98781 states and 118831 transitions. Word has length 435 [2021-02-21 21:45:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:45:53,790 INFO L480 AbstractCegarLoop]: Abstraction has 98781 states and 118831 transitions. [2021-02-21 21:45:53,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:45:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 98781 states and 118831 transitions. [2021-02-21 21:45:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2021-02-21 21:45:53,850 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:45:53,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:45:53,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 21:45:53,851 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:45:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:45:53,851 INFO L82 PathProgramCache]: Analyzing trace with hash -212309535, now seen corresponding path program 1 times [2021-02-21 21:45:53,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:45:53,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398832463] [2021-02-21 21:45:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:45:53,855 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:45:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:45:53,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:53,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:53,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:53,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:45:53,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:53,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:54,253 WARN L202 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2021-02-21 21:45:54,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:45:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:45:54,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:45:54,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:45:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:45:54,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398832463] [2021-02-21 21:45:54,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:45:54,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:45:54,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147957211] [2021-02-21 21:45:54,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:45:54,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:45:54,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:45:54,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:45:54,599 INFO L87 Difference]: Start difference. First operand 98781 states and 118831 transitions. Second operand 4 states. [2021-02-21 21:46:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:46:23,936 INFO L93 Difference]: Finished difference Result 293245 states and 352955 transitions. [2021-02-21 21:46:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:46:23,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 436 [2021-02-21 21:46:23,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:46:24,290 INFO L225 Difference]: With dead ends: 293245 [2021-02-21 21:46:24,290 INFO L226 Difference]: Without dead ends: 196729 [2021-02-21 21:46:24,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:46:24,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196729 states. [2021-02-21 21:46:38,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196729 to 98821. [2021-02-21 21:46:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98821 states. [2021-02-21 21:46:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98821 states to 98821 states and 118871 transitions. [2021-02-21 21:46:38,565 INFO L78 Accepts]: Start accepts. Automaton has 98821 states and 118871 transitions. Word has length 436 [2021-02-21 21:46:38,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:46:38,566 INFO L480 AbstractCegarLoop]: Abstraction has 98821 states and 118871 transitions. [2021-02-21 21:46:38,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:46:38,566 INFO L276 IsEmpty]: Start isEmpty. Operand 98821 states and 118871 transitions. [2021-02-21 21:46:38,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-02-21 21:46:38,631 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:46:38,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:46:38,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 21:46:38,631 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:46:38,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:46:38,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1951436416, now seen corresponding path program 1 times [2021-02-21 21:46:38,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:46:38,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171429113] [2021-02-21 21:46:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:46:38,636 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:46:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:46:38,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:46:38,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:46:38,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:46:38,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:46:38,817 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-21 21:46:38,818 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-21 21:46:38,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:46:38,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:46:38,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:46:38,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:46:39,460 WARN L202 SmtUtils]: Spent 594.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2021-02-21 21:46:39,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:46:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:46:39,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:46:39,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:46:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:46:39,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171429113] [2021-02-21 21:46:39,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:46:39,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:46:39,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959626155] [2021-02-21 21:46:39,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:46:39,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:46:39,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:46:39,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:46:39,757 INFO L87 Difference]: Start difference. First operand 98821 states and 118871 transitions. Second operand 6 states. [2021-02-21 21:46:59,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:46:59,749 INFO L93 Difference]: Finished difference Result 199189 states and 239436 transitions. [2021-02-21 21:46:59,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:46:59,750 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 437 [2021-02-21 21:46:59,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:46:59,912 INFO L225 Difference]: With dead ends: 199189 [2021-02-21 21:46:59,912 INFO L226 Difference]: Without dead ends: 101009 [2021-02-21 21:47:00,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:47:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101009 states.