/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:46:38,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:46:38,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:46:38,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:46:38,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:46:38,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:46:38,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:46:38,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:46:38,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:46:38,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:46:38,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:46:38,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:46:38,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:46:38,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:46:38,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:46:38,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:46:38,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:46:38,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:46:38,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:46:38,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:46:38,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:46:38,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:46:38,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:46:38,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:46:38,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 22:46:38,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 22:46:38,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 22:46:38,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 22:46:38,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 22:46:38,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 22:46:38,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 22:46:38,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 22:46:38,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 22:46:38,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 22:46:38,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 22:46:38,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 22:46:38,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 22:46:38,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 22:46:38,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:46:38,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:46:38,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:46:38,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:46:38,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:46:38,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:46:38,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:46:38,882 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:46:38,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:46:38,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:46:38,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:46:38,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:46:38,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:46:38,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:46:38,884 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:46:38,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:46:38,884 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:46:38,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:46:38,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:46:38,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:46:38,884 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:46:38,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:46:38,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:46:38,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:46:38,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:46:38,886 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:46:38,887 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:46:39,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:46:39,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:46:39,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:46:39,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:46:39,168 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:46:39,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound50.c [2021-05-02 22:46:39,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383b5a0d4/ac9d6155567c4130a4aaa7be4cb4525f/FLAGefb411380 [2021-05-02 22:46:39,588 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:46:39,589 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound50.c [2021-05-02 22:46:39,593 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383b5a0d4/ac9d6155567c4130a4aaa7be4cb4525f/FLAGefb411380 [2021-05-02 22:46:39,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383b5a0d4/ac9d6155567c4130a4aaa7be4cb4525f [2021-05-02 22:46:39,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:46:39,607 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:46:39,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:46:39,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:46:39,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:46:39,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:46:39" (1/1) ... [2021-05-02 22:46:39,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11365e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:39, skipping insertion in model container [2021-05-02 22:46:39,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:46:39" (1/1) ... [2021-05-02 22:46:39,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:46:39,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:46:39,744 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_valuebound50.c[458,471] [2021-05-02 22:46:39,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:46:39,773 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:46:39,784 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_valuebound50.c[458,471] [2021-05-02 22:46:39,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:46:39,846 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:46:39,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:39 WrapperNode [2021-05-02 22:46:39,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:46:39,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:46:39,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:46:39,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:46:39,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:39" (1/1) ... [2021-05-02 22:46:39,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:39" (1/1) ... [2021-05-02 22:46:39,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:39" (1/1) ... [2021-05-02 22:46:39,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:39" (1/1) ... [2021-05-02 22:46:39,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:39" (1/1) ... [2021-05-02 22:46:39,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:39" (1/1) ... [2021-05-02 22:46:39,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:39" (1/1) ... [2021-05-02 22:46:39,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:46:39,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:46:39,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:46:39,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:46:39,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:39" (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 22:46:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:46:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:46:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:46:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:46:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:46:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:46:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:46:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:46:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:46:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:46:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:46:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:46:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:46:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:46:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:46:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:46:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:46:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:46:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:46:39,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:46:40,174 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:46:40,174 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:46:40,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:46:40 BoogieIcfgContainer [2021-05-02 22:46:40,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:46:40,176 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:46:40,176 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:46:40,176 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:46:40,178 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:46:40" (1/1) ... [2021-05-02 22:46:40,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:46:40 BasicIcfg [2021-05-02 22:46:40,190 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:46:40,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:46:40,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:46:40,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:46:40,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:46:39" (1/4) ... [2021-05-02 22:46:40,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356051b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:46:40, skipping insertion in model container [2021-05-02 22:46:40,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:39" (2/4) ... [2021-05-02 22:46:40,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356051b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:46:40, skipping insertion in model container [2021-05-02 22:46:40,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:46:40" (3/4) ... [2021-05-02 22:46:40,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356051b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:46:40, skipping insertion in model container [2021-05-02 22:46:40,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:46:40" (4/4) ... [2021-05-02 22:46:40,195 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound50.cJordan [2021-05-02 22:46:40,198 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:46:40,209 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:46:40,226 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:46:40,246 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:46:40,246 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:46:40,246 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:46:40,247 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:46:40,247 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:46:40,247 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:46:40,247 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:46:40,247 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:46:40,259 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 22:46:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:46:40,264 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:40,265 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 22:46:40,265 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:40,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2021-05-02 22:46:40,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:40,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417802612] [2021-05-02 22:46:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:46:40,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:46:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:46:40,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:46:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:46:40,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 22:46:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:46:40,443 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 22:46:40,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:40,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417802612] [2021-05-02 22:46:40,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417802612] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:46:40,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:46:40,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:46:40,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399591287] [2021-05-02 22:46:40,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:46:40,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:40,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:46:40,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:46:40,458 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 22:46:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:42,596 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-02 22:46:42,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:46:42,598 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 22:46:42,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:42,603 INFO L225 Difference]: With dead ends: 29 [2021-05-02 22:46:42,603 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 22:46:42,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:46:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 22:46:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 22:46:42,628 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 22:46:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 22:46:42,631 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-02 22:46:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:42,632 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 22:46:42,632 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 22:46:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 22:46:42,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:46:42,634 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:42,634 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 22:46:42,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:46:42,635 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:42,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:42,637 INFO L82 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2021-05-02 22:46:42,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:42,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15919899] [2021-05-02 22:46:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:42,655 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:42,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440319089] [2021-05-02 22:46:42,655 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 22:46:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:46:42,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:46:42,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:42,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:42,853 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 22:46:42,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:42,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15919899] [2021-05-02 22:46:42,854 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:42,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440319089] [2021-05-02 22:46:42,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440319089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:42,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:42,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:46:42,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780028104] [2021-05-02 22:46:42,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:46:42,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:42,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:46:42,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:46:42,860 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 22:46:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:43,053 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-02 22:46:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:46:43,054 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 22:46:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:43,054 INFO L225 Difference]: With dead ends: 33 [2021-05-02 22:46:43,054 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 22:46:43,055 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:46:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 22:46:43,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 22:46:43,059 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 22:46:43,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-02 22:46:43,059 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-02 22:46:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:43,060 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-02 22:46:43,060 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 22:46:43,060 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-02 22:46:43,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 22:46:43,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:43,061 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 22:46:43,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:46:43,271 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:43,271 INFO L82 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2021-05-02 22:46:43,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:43,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703464399] [2021-05-02 22:46:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:43,281 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:43,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313810070] [2021-05-02 22:46:43,282 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 22:46:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:46:43,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:46:43,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:43,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:43,481 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 22:46:43,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:43,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703464399] [2021-05-02 22:46:43,481 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:43,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313810070] [2021-05-02 22:46:43,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313810070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:43,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:43,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:46:43,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638603557] [2021-05-02 22:46:43,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:46:43,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:43,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:46:43,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:46:43,483 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 22:46:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:43,800 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-02 22:46:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:46:43,800 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 22:46:43,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:43,801 INFO L225 Difference]: With dead ends: 40 [2021-05-02 22:46:43,801 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 22:46:43,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:46:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 22:46:43,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 22:46:43,805 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 22:46:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-02 22:46:43,805 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-02 22:46:43,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:43,806 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-02 22:46:43,806 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 22:46:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-02 22:46:43,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:46:43,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:43,807 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 22:46:44,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:46:44,015 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:44,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:44,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1813677706, now seen corresponding path program 2 times [2021-05-02 22:46:44,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:44,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579543759] [2021-05-02 22:46:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:44,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:44,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786420242] [2021-05-02 22:46:44,033 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 22:46:44,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:46:44,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:44,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 22:46:44,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:44,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,243 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 22:46:44,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:44,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579543759] [2021-05-02 22:46:44,244 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:44,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786420242] [2021-05-02 22:46:44,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786420242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:44,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:44,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:46:44,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214913166] [2021-05-02 22:46:44,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:46:44,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:44,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:46:44,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:46:44,245 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 22:46:44,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:44,349 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-02 22:46:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:46:44,349 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 22:46:44,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:44,350 INFO L225 Difference]: With dead ends: 49 [2021-05-02 22:46:44,350 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 22:46:44,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:46:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 22:46:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-02 22:46:44,355 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 22:46:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-02 22:46:44,356 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-02 22:46:44,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:44,356 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-02 22:46:44,356 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 22:46:44,356 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-02 22:46:44,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 22:46:44,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:44,357 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 22:46:44,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:46:44,561 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:44,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:44,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2021-05-02 22:46:44,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:44,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194879957] [2021-05-02 22:46:44,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:44,569 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:44,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910666857] [2021-05-02 22:46:44,570 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 22:46:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:46:44,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 22:46:44,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:44,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:44,817 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 22:46:44,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:44,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194879957] [2021-05-02 22:46:44,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:44,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910666857] [2021-05-02 22:46:44,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910666857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:44,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:44,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:46:44,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276317044] [2021-05-02 22:46:44,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:46:44,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:44,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:46:44,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:46:44,819 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 22:46:46,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:46,963 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-05-02 22:46:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 22:46:46,964 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 22:46:46,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:46,965 INFO L225 Difference]: With dead ends: 54 [2021-05-02 22:46:46,965 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:46:46,966 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:46:46,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:46:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 22:46:46,969 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 22:46:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 22:46:46,969 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-02 22:46:46,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:46,970 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 22:46:46,970 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 22:46:46,970 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 22:46:46,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 22:46:46,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:46,970 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 22:46:47,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:46:47,185 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:47,185 INFO L82 PathProgramCache]: Analyzing trace with hash -241657738, now seen corresponding path program 3 times [2021-05-02 22:46:47,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:47,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475924234] [2021-05-02 22:46:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:47,195 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:47,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791684873] [2021-05-02 22:46:47,195 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 22:46:47,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:46:47,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:47,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:46:47,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:47,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:47,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:47,520 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 22:46:47,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:47,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475924234] [2021-05-02 22:46:47,520 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:47,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791684873] [2021-05-02 22:46:47,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791684873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:47,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:47,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:46:47,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565017426] [2021-05-02 22:46:47,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:46:47,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:47,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:46:47,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:46:47,522 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 22:46:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:47,819 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-02 22:46:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:46:47,820 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 22:46:47,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:47,820 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:46:47,820 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:46:47,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:46:47,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:46:47,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-02 22:46:47,823 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 22:46:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 22:46:47,824 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-02 22:46:47,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:47,824 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 22:46:47,824 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 22:46:47,824 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 22:46:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 22:46:47,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:47,825 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 22:46:48,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 22:46:48,033 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:48,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:48,033 INFO L82 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2021-05-02 22:46:48,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:48,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305655625] [2021-05-02 22:46:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:48,040 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:48,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438041434] [2021-05-02 22:46:48,041 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 22:46:48,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:46:48,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:48,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 22:46:48,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:48,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:48,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:48,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:48,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:48,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:48,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:48,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:48,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:48,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:48,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:48,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:48,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:48,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:48,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:48,280 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 22:46:48,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:48,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305655625] [2021-05-02 22:46:48,281 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:48,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438041434] [2021-05-02 22:46:48,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438041434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:48,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:48,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:46:48,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081639101] [2021-05-02 22:46:48,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:46:48,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:48,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:46:48,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:46:48,282 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 22:46:48,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:48,406 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-05-02 22:46:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:46:48,407 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 22:46:48,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:48,407 INFO L225 Difference]: With dead ends: 49 [2021-05-02 22:46:48,408 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 22:46:48,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:46:48,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 22:46:48,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-05-02 22:46:48,418 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 22:46:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-02 22:46:48,419 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-02 22:46:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:48,420 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-02 22:46:48,421 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 22:46:48,421 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-02 22:46:48,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 22:46:48,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:48,423 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 22:46:48,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:46:48,633 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:48,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:48,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2021-05-02 22:46:48,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:48,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101048459] [2021-05-02 22:46:48,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:48,640 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:48,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119534870] [2021-05-02 22:46:48,641 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 22:46:49,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 22:46:49,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:49,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 22:46:49,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:49,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,200 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 22:46:49,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:49,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101048459] [2021-05-02 22:46:49,200 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:49,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119534870] [2021-05-02 22:46:49,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119534870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:49,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:49,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:46:49,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512706106] [2021-05-02 22:46:49,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:46:49,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:49,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:46:49,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:46:49,208 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 22:46:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:49,345 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-05-02 22:46:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 22:46:49,345 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 22:46:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:49,346 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:46:49,346 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 22:46:49,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:46:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 22:46:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 22:46:49,349 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 22:46:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-02 22:46:49,349 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-02 22:46:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:49,349 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-02 22:46:49,349 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 22:46:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-02 22:46:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 22:46:49,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:49,350 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 22:46:49,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:46:49,554 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:49,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:49,554 INFO L82 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2021-05-02 22:46:49,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:49,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527397521] [2021-05-02 22:46:49,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:49,575 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:49,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703584586] [2021-05-02 22:46:49,575 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 22:46:49,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:46:49,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:49,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 22:46:49,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:49,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 22:46:49,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:49,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527397521] [2021-05-02 22:46:49,791 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:49,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703584586] [2021-05-02 22:46:49,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703584586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:49,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:49,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:46:49,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745424491] [2021-05-02 22:46:49,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:46:49,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:49,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:46:49,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:46:49,792 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-02 22:46:49,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:49,902 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-02 22:46:49,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:46:49,903 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2021-05-02 22:46:49,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:49,903 INFO L225 Difference]: With dead ends: 53 [2021-05-02 22:46:49,903 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 22:46:49,904 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:46:49,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 22:46:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 22:46:49,906 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 22:46:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-02 22:46:49,907 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-02 22:46:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:49,907 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-02 22:46:49,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-02 22:46:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-02 22:46:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 22:46:49,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:49,907 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 22:46:50,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 22:46:50,125 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:50,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:50,125 INFO L82 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2021-05-02 22:46:50,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:50,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100426480] [2021-05-02 22:46:50,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:50,131 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:50,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168131588] [2021-05-02 22:46:50,131 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 22:46:50,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 22:46:50,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:50,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 22:46:50,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:50,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:50,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:50,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:50,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:50,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:50,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:50,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:50,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:50,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:50,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:50,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:50,848 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 22:46:50,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:50,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100426480] [2021-05-02 22:46:50,848 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:50,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168131588] [2021-05-02 22:46:50,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168131588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:50,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:50,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 22:46:50,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240242669] [2021-05-02 22:46:50,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 22:46:50,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:50,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 22:46:50,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:46:50,850 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 22:46:51,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:51,013 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-02 22:46:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 22:46:51,013 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 22:46:51,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:51,014 INFO L225 Difference]: With dead ends: 56 [2021-05-02 22:46:51,014 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 22:46:51,014 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:46:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 22:46:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-02 22:46:51,016 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 22:46:51,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-05-02 22:46:51,017 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 68 [2021-05-02 22:46:51,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:51,017 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-05-02 22:46:51,017 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 22:46:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-05-02 22:46:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 22:46:51,018 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:51,018 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 22:46:51,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:46:51,222 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:51,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:51,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2021-05-02 22:46:51,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:51,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683845538] [2021-05-02 22:46:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:51,240 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:51,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375014036] [2021-05-02 22:46:51,240 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