/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:42:51,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:42:51,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:42:51,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:42:51,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:42:51,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:42:51,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:42:51,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:42:51,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:42:51,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:42:51,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:42:51,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:42:51,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:42:51,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:42:51,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:42:51,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:42:51,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:42:51,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:42:51,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:42:51,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:42:51,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:42:51,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:42:51,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:42:51,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:42:51,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 22:42:51,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 22:42:51,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 22:42:51,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 22:42:51,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 22:42:51,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 22:42:51,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 22:42:51,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 22:42:51,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 22:42:51,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 22:42:51,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 22:42:51,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 22:42:51,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 22:42:51,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 22:42:51,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:42:51,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:42:51,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:42:51,865 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:42:51,881 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:42:51,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:42:51,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:42:51,883 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:42:51,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:42:51,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:42:51,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:42:51,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:42:51,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:42:51,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:42:51,885 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:42:51,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:42:51,885 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:42:51,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:42:51,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:42:51,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:42:51,885 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:42:51,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:42:51,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:42:51,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:42:51,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:42:51,887 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:42:51,887 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:42:52,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:42:52,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:42:52,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:42:52,169 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:42:52,170 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:42:52,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c [2021-05-02 22:42:52,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/685b3f8f2/825a3d178dc844c4b6886604a7868ac3/FLAGffc5be8bc [2021-05-02 22:42:52,554 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:42:52,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c [2021-05-02 22:42:52,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/685b3f8f2/825a3d178dc844c4b6886604a7868ac3/FLAGffc5be8bc [2021-05-02 22:42:52,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/685b3f8f2/825a3d178dc844c4b6886604a7868ac3 [2021-05-02 22:42:52,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:42:52,969 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:42:52,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:42:52,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:42:52,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:42:52,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:42:52" (1/1) ... [2021-05-02 22:42:52,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1baab4cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:42:52, skipping insertion in model container [2021-05-02 22:42:52,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:42:52" (1/1) ... [2021-05-02 22:42:52,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:42:52,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:42:53,105 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c[458,471] [2021-05-02 22:42:53,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:42:53,132 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:42:53,143 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c[458,471] [2021-05-02 22:42:53,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:42:53,190 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:42:53,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:42:53 WrapperNode [2021-05-02 22:42:53,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:42:53,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:42:53,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:42:53,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:42:53,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:42:53" (1/1) ... [2021-05-02 22:42:53,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:42:53" (1/1) ... [2021-05-02 22:42:53,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:42:53" (1/1) ... [2021-05-02 22:42:53,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:42:53" (1/1) ... [2021-05-02 22:42:53,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:42:53" (1/1) ... [2021-05-02 22:42:53,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:42:53" (1/1) ... [2021-05-02 22:42:53,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:42:53" (1/1) ... [2021-05-02 22:42:53,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:42:53,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:42:53,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:42:53,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:42:53,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:42:53" (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 [2021-05-02 22:42:53,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:42:53,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:42:53,348 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:42:53,348 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:42:53,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:42:53,348 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:42:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:42:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:42:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:42:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:42:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:42:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:42:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:42:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:42:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:42:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:42:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:42:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:42:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:42:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:42:53,566 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:42:53,566 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:42:53,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:42:53 BoogieIcfgContainer [2021-05-02 22:42:53,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:42:53,568 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:42:53,568 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:42:53,568 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:42:53,570 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:42:53" (1/1) ... [2021-05-02 22:42:53,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:42:53 BasicIcfg [2021-05-02 22:42:53,598 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:42:53,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:42:53,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:42:53,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:42:53,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:42:52" (1/4) ... [2021-05-02 22:42:53,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671fd92b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:42:53, skipping insertion in model container [2021-05-02 22:42:53,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:42:53" (2/4) ... [2021-05-02 22:42:53,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671fd92b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:42:53, skipping insertion in model container [2021-05-02 22:42:53,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:42:53" (3/4) ... [2021-05-02 22:42:53,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671fd92b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:42:53, skipping insertion in model container [2021-05-02 22:42:53,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:42:53" (4/4) ... [2021-05-02 22:42:53,602 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound10.cJordan [2021-05-02 22:42:53,622 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:42:53,625 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:42:53,636 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:42:53,665 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:42:53,665 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:42:53,665 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:42:53,665 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:42:53,665 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:42:53,665 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:42:53,665 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:42:53,665 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:42:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:42:53,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:42:53,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:42:53,683 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:42:53,684 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:42:53,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:42:53,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2021-05-02 22:42:53,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:42:53,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031308151] [2021-05-02 22:42:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:42:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:42:53,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:42:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:42:53,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:42:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:42:53,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 22:42:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:42:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 22:42:53,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:42:53,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031308151] [2021-05-02 22:42:53,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031308151] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:42:53,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:42:53,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:42:53,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593257890] [2021-05-02 22:42:53,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:42:53,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:42:53,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:42:53,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:42:53,942 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:42:54,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:42:54,177 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-02 22:42:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:42:54,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 22:42:54,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:42:54,182 INFO L225 Difference]: With dead ends: 29 [2021-05-02 22:42:54,183 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 22:42:54,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:42:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 22:42:54,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 22:42:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:42:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 22:42:54,204 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-02 22:42:54,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:42:54,205 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 22:42:54,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:42:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 22:42:54,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:42:54,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:42:54,206 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:42:54,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:42:54,206 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:42:54,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:42:54,207 INFO L82 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2021-05-02 22:42:54,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:42:54,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113118289] [2021-05-02 22:42:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:42:54,219 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:42:54,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92643834] [2021-05-02 22:42:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:42:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:42:54,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:42:54,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:42:54,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:42:54,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:42:54,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113118289] [2021-05-02 22:42:54,370 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:42:54,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92643834] [2021-05-02 22:42:54,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92643834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:42:54,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:42:54,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:42:54,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957329019] [2021-05-02 22:42:54,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:42:54,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:42:54,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:42:54,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:42:54,372 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 22:42:54,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:42:54,435 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-02 22:42:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:42:54,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-02 22:42:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:42:54,437 INFO L225 Difference]: With dead ends: 33 [2021-05-02 22:42:54,437 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 22:42:54,437 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:42:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 22:42:54,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 22:42:54,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:42:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-02 22:42:54,442 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-02 22:42:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:42:54,442 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-02 22:42:54,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 22:42:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-02 22:42:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 22:42:54,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:42:54,443 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:42:54,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:42:54,653 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:42:54,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:42:54,654 INFO L82 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2021-05-02 22:42:54,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:42:54,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190588642] [2021-05-02 22:42:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:42:54,662 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:42:54,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896541735] [2021-05-02 22:42:54,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:42:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:42:54,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:42:54,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:42:54,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:42:54,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:42:54,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190588642] [2021-05-02 22:42:54,826 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:42:54,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896541735] [2021-05-02 22:42:54,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896541735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:42:54,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:42:54,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:42:54,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829024165] [2021-05-02 22:42:54,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:42:54,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:42:54,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:42:54,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:42:54,828 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:42:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:42:54,891 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-02 22:42:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:42:54,891 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 22:42:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:42:54,892 INFO L225 Difference]: With dead ends: 40 [2021-05-02 22:42:54,892 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 22:42:54,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:42:54,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 22:42:54,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 22:42:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:42:54,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-02 22:42:54,896 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-02 22:42:54,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:42:54,896 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-02 22:42:54,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:42:54,897 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-02 22:42:54,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:42:54,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:42:54,897 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:42:55,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:42:55,117 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:42:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:42:55,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1813677706, now seen corresponding path program 2 times [2021-05-02 22:42:55,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:42:55,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411960476] [2021-05-02 22:42:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:42:55,126 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:42:55,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752784073] [2021-05-02 22:42:55,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:42:55,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:42:55,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:42:55,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 22:42:55,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:42:55,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 22:42:55,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:42:55,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411960476] [2021-05-02 22:42:55,363 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:42:55,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752784073] [2021-05-02 22:42:55,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752784073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:42:55,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:42:55,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:42:55,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962991558] [2021-05-02 22:42:55,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:42:55,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:42:55,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:42:55,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:42:55,364 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:42:55,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:42:55,453 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-02 22:42:55,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:42:55,453 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 22:42:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:42:55,454 INFO L225 Difference]: With dead ends: 49 [2021-05-02 22:42:55,454 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 22:42:55,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:42:55,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 22:42:55,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-02 22:42:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:42:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-02 22:42:55,458 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-02 22:42:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:42:55,459 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-02 22:42:55,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:42:55,459 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-02 22:42:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 22:42:55,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:42:55,460 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:42:55,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:42:55,676 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:42:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:42:55,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2021-05-02 22:42:55,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:42:55,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634895694] [2021-05-02 22:42:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:42:55,685 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:42:55,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928211071] [2021-05-02 22:42:55,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:42:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:42:55,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 22:42:55,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:42:55,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 22:42:55,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:42:55,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634895694] [2021-05-02 22:42:55,887 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:42:55,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928211071] [2021-05-02 22:42:55,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928211071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:42:55,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:42:55,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:42:55,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453984998] [2021-05-02 22:42:55,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:42:55,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:42:55,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:42:55,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:42:55,888 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 22:42:55,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:42:55,969 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-05-02 22:42:55,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 22:42:55,970 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2021-05-02 22:42:55,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:42:55,971 INFO L225 Difference]: With dead ends: 54 [2021-05-02 22:42:55,971 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:42:55,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:42:55,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:42:55,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 22:42:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:42:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 22:42:55,975 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-02 22:42:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:42:55,975 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 22:42:55,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 22:42:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 22:42:55,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 22:42:55,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:42:55,976 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:42:56,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:42:56,208 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:42:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:42:56,208 INFO L82 PathProgramCache]: Analyzing trace with hash -241657738, now seen corresponding path program 3 times [2021-05-02 22:42:56,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:42:56,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078451981] [2021-05-02 22:42:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:42:56,217 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:42:56,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623024452] [2021-05-02 22:42:56,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:42:56,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:42:56,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:42:56,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:42:56,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:42:56,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 22:42:56,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:42:56,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078451981] [2021-05-02 22:42:56,374 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:42:56,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623024452] [2021-05-02 22:42:56,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623024452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:42:56,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:42:56,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:42:56,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422306462] [2021-05-02 22:42:56,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:42:56,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:42:56,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:42:56,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:42:56,375 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 22:42:56,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:42:56,429 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-02 22:42:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:42:56,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-02 22:42:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:42:56,431 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:42:56,431 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:42:56,431 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:42:56,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:42:56,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-02 22:42:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:42:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 22:42:56,434 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-02 22:42:56,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:42:56,434 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 22:42:56,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 22:42:56,434 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 22:42:56,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 22:42:56,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:42:56,435 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:42:56,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 22:42:56,651 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:42:56,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:42:56,651 INFO L82 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2021-05-02 22:42:56,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:42:56,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028713426] [2021-05-02 22:42:56,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:42:56,658 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:42:56,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538531181] [2021-05-02 22:42:56,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:42:56,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:42:56,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:42:56,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 22:42:56,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:42:56,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 22:42:56,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:42:56,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028713426] [2021-05-02 22:42:56,947 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:42:56,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538531181] [2021-05-02 22:42:56,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538531181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:42:56,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:42:56,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:42:56,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156423167] [2021-05-02 22:42:56,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:42:56,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:42:56,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:42:56,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:42:56,949 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 22:42:57,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:42:57,055 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-05-02 22:42:57,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:42:57,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-02 22:42:57,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:42:57,056 INFO L225 Difference]: With dead ends: 49 [2021-05-02 22:42:57,056 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 22:42:57,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:42:57,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 22:42:57,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-05-02 22:42:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:42:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-02 22:42:57,060 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-02 22:42:57,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:42:57,060 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-02 22:42:57,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 22:42:57,060 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-02 22:42:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 22:42:57,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:42:57,061 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:42:57,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:42:57,278 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:42:57,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:42:57,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2021-05-02 22:42:57,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:42:57,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446106425] [2021-05-02 22:42:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:42:57,292 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:42:57,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154152142] [2021-05-02 22:42:57,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:42:57,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 22:42:57,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:42:57,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 22:42:57,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:42:57,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:57,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:57,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:57,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:57,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:57,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:57,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:57,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:57,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:57,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:57,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-02 22:42:57,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:42:57,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446106425] [2021-05-02 22:42:57,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:42:57,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154152142] [2021-05-02 22:42:57,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154152142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:42:57,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:42:57,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:42:57,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931243212] [2021-05-02 22:42:57,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:42:57,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:42:57,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:42:57,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:42:57,708 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 22:42:57,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:42:57,810 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-05-02 22:42:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 22:42:57,811 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-02 22:42:57,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:42:57,812 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:42:57,812 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 22:42:57,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:42:57,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 22:42:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 22:42:57,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:42:57,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-02 22:42:57,815 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-02 22:42:57,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:42:57,815 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-02 22:42:57,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 22:42:57,815 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-02 22:42:57,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 22:42:57,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:42:57,816 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:42:58,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:42:58,020 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:42:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:42:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2021-05-02 22:42:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:42:58,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750210161] [2021-05-02 22:42:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:42:58,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:42:58,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573863562] [2021-05-02 22:42:58,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:42:58,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:42:58,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:42:58,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 22:42:58,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:42:58,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 22:42:58,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:42:58,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750210161] [2021-05-02 22:42:58,316 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:42:58,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573863562] [2021-05-02 22:42:58,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573863562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:42:58,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:42:58,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 22:42:58,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411380839] [2021-05-02 22:42:58,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 22:42:58,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:42:58,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 22:42:58,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:42:58,318 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 8 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 22:42:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:42:58,675 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-05-02 22:42:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 22:42:58,675 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 8 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 61 [2021-05-02 22:42:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:42:58,676 INFO L225 Difference]: With dead ends: 55 [2021-05-02 22:42:58,676 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 22:42:58,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:42:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 22:42:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-05-02 22:42:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:42:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-02 22:42:58,679 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-02 22:42:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:42:58,679 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-02 22:42:58,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 8 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 22:42:58,680 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-02 22:42:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 22:42:58,680 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:42:58,680 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:42:58,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 22:42:58,893 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:42:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:42:58,893 INFO L82 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2021-05-02 22:42:58,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:42:58,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671341977] [2021-05-02 22:42:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:42:58,899 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:42:58,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166224416] [2021-05-02 22:42:58,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:42:59,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 22:42:59,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:42:59,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 22:42:59,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:42:59,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:59,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:59,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:59,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:59,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:59,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:59,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:59,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:59,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:59,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:59,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:42:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 22:42:59,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:42:59,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671341977] [2021-05-02 22:42:59,624 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:42:59,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166224416] [2021-05-02 22:42:59,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166224416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:42:59,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:42:59,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 22:42:59,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211150840] [2021-05-02 22:42:59,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 22:42:59,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:42:59,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 22:42:59,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:42:59,626 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-02 22:42:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:42:59,917 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-02 22:42:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 22:42:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2021-05-02 22:42:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:42:59,919 INFO L225 Difference]: With dead ends: 56 [2021-05-02 22:42:59,919 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 22:42:59,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:42:59,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 22:42:59,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-02 22:42:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:42:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-05-02 22:42:59,922 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 68 [2021-05-02 22:42:59,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:42:59,922 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-05-02 22:42:59,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-02 22:42:59,922 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-05-02 22:42:59,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 22:42:59,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:42:59,923 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:43:00,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:43:00,127 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:43:00,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:43:00,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2021-05-02 22:43:00,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:43:00,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922869591] [2021-05-02 22:43:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:43:00,134 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:43:00,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760649339] [2021-05-02 22:43:00,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:43:29,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 22:43:29,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:43:29,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 22:43:29,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:43:29,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 66 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-05-02 22:43:29,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:43:29,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922869591] [2021-05-02 22:43:29,670 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:43:29,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760649339] [2021-05-02 22:43:29,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760649339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:43:29,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:43:29,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 22:43:29,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371210413] [2021-05-02 22:43:29,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 22:43:29,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:43:29,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 22:43:29,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:43:29,671 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-02 22:43:29,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:43:29,818 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-05-02 22:43:29,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 22:43:29,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 75 [2021-05-02 22:43:29,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:43:29,820 INFO L225 Difference]: With dead ends: 61 [2021-05-02 22:43:29,821 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 22:43:29,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 22:43:29,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 22:43:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-05-02 22:43:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 14 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:43:29,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-05-02 22:43:29,829 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 75 [2021-05-02 22:43:29,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:43:29,830 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-05-02 22:43:29,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-02 22:43:29,830 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-05-02 22:43:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 22:43:29,831 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:43:29,831 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:43:30,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 22:43:30,054 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:43:30,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:43:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash 252865655, now seen corresponding path program 7 times [2021-05-02 22:43:30,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:43:30,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701573041] [2021-05-02 22:43:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:43:30,060 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:43:30,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013437937] [2021-05-02 22:43:30,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:43:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:43:30,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 22:43:30,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:43:30,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:30,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:30,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:30,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:30,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:30,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:30,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:30,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:30,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:30,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:30,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:30,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 22:43:31,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:43:31,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701573041] [2021-05-02 22:43:31,123 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:43:31,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013437937] [2021-05-02 22:43:31,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013437937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:43:31,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:43:31,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 22:43:31,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839016622] [2021-05-02 22:43:31,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 22:43:31,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:43:31,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 22:43:31,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:43:31,125 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-02 22:43:31,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:43:31,430 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-05-02 22:43:31,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 22:43:31,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 82 [2021-05-02 22:43:31,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:43:31,433 INFO L225 Difference]: With dead ends: 64 [2021-05-02 22:43:31,434 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 22:43:31,435 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-02 22:43:31,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 22:43:31,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-05-02 22:43:31,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 15 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:43:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 22:43:31,448 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 82 [2021-05-02 22:43:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:43:31,448 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 22:43:31,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-02 22:43:31,450 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 22:43:31,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 22:43:31,450 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:43:31,450 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:43:31,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 22:43:31,664 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:43:31,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:43:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash 288751971, now seen corresponding path program 8 times [2021-05-02 22:43:31,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:43:31,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291197092] [2021-05-02 22:43:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:43:31,670 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:43:31,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621888728] [2021-05-02 22:43:31,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:43:32,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:43:32,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:43:32,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 22:43:32,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:43:32,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:43:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 23 proven. 108 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-05-02 22:43:32,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:43:32,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291197092] [2021-05-02 22:43:32,973 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:43:32,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621888728] [2021-05-02 22:43:32,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621888728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:43:32,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:43:32,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 22:43:32,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979028020] [2021-05-02 22:43:32,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 22:43:32,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:43:32,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 22:43:32,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-02 22:43:32,976 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 11 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-05-02 22:43:33,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:43:33,195 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-05-02 22:43:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 22:43:33,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 11 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2021-05-02 22:43:33,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:43:33,196 INFO L225 Difference]: With dead ends: 67 [2021-05-02 22:43:33,196 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 22:43:33,196 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-02 22:43:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 22:43:33,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2021-05-02 22:43:33,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 16 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:43:33,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-05-02 22:43:33,202 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 89 [2021-05-02 22:43:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:43:33,203 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-05-02 22:43:33,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 11 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-05-02 22:43:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-05-02 22:43:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 22:43:33,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:43:33,205 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:43:33,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:43:33,410 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:43:33,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:43:33,410 INFO L82 PathProgramCache]: Analyzing trace with hash -482784521, now seen corresponding path program 9 times [2021-05-02 22:43:33,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:43:33,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163326271] [2021-05-02 22:43:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:43:33,424 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:43:33,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751547897] [2021-05-02 22:43:33,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true