/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/fermat1-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:36:22,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:36:22,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:36:22,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:36:22,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:36:22,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:36:22,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:36:22,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:36:22,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:36:22,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:36:22,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:36:22,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:36:22,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:36:22,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:36:22,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:36:22,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:36:22,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:36:22,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:36:22,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:36:22,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:36:22,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:36:22,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:36:22,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:36:22,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:36:22,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 20:36:22,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 20:36:22,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 20:36:22,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 20:36:22,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 20:36:22,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 20:36:22,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 20:36:22,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 20:36:22,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 20:36:22,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 20:36:22,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 20:36:22,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 20:36:22,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 20:36:22,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 20:36:22,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:36:22,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:36:22,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:36:22,884 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:36:22,895 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:36:22,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:36:22,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:36:22,898 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:36:22,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:36:22,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:36:22,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:36:22,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:36:22,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:36:22,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:36:22,899 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:36:22,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:36:22,899 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:36:22,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:36:22,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:36:22,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:36:22,899 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:36:22,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:36:22,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:36:22,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:36:22,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:36:22,900 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:36:22,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:36:23,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:36:23,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:36:23,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:36:23,180 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:36:23,181 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:36:23,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound50.c [2021-05-02 20:36:23,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c530bee2/93eda77aba5642f1aeb3b8644d3b938e/FLAG9f26fc6a5 [2021-05-02 20:36:23,578 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:36:23,579 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound50.c [2021-05-02 20:36:23,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c530bee2/93eda77aba5642f1aeb3b8644d3b938e/FLAG9f26fc6a5 [2021-05-02 20:36:23,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c530bee2/93eda77aba5642f1aeb3b8644d3b938e [2021-05-02 20:36:23,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:36:23,599 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:36:23,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:36:23,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:36:23,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:36:23,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:36:23" (1/1) ... [2021-05-02 20:36:23,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54bd9328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:36:23, skipping insertion in model container [2021-05-02 20:36:23,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:36:23" (1/1) ... [2021-05-02 20:36:23,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:36:23,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:36:23,714 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/fermat1-ll_valuebound50.c[535,548] [2021-05-02 20:36:23,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:36:23,730 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:36:23,743 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/fermat1-ll_valuebound50.c[535,548] [2021-05-02 20:36:23,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:36:23,760 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:36:23,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:36:23 WrapperNode [2021-05-02 20:36:23,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:36:23,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:36:23,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:36:23,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:36:23,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:36:23" (1/1) ... [2021-05-02 20:36:23,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:36:23" (1/1) ... [2021-05-02 20:36:23,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:36:23" (1/1) ... [2021-05-02 20:36:23,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:36:23" (1/1) ... [2021-05-02 20:36:23,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:36:23" (1/1) ... [2021-05-02 20:36:23,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:36:23" (1/1) ... [2021-05-02 20:36:23,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:36:23" (1/1) ... [2021-05-02 20:36:23,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:36:23,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:36:23,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:36:23,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:36:23,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:36:23" (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 20:36:23,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:36:23,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:36:23,870 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:36:23,871 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:36:23,871 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:36:23,871 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:36:23,871 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:36:23,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:36:23,872 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:36:23,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:36:23,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:36:23,872 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:36:23,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:36:23,873 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:36:23,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:36:23,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:36:23,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:36:23,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:36:23,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:36:23,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:36:24,065 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:36:24,065 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:36:24,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:36:24 BoogieIcfgContainer [2021-05-02 20:36:24,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:36:24,066 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:36:24,066 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:36:24,067 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:36:24,068 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:36:24" (1/1) ... [2021-05-02 20:36:24,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:36:24 BasicIcfg [2021-05-02 20:36:24,080 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:36:24,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:36:24,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:36:24,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:36:24,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:36:23" (1/4) ... [2021-05-02 20:36:24,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d130ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:36:24, skipping insertion in model container [2021-05-02 20:36:24,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:36:23" (2/4) ... [2021-05-02 20:36:24,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d130ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:36:24, skipping insertion in model container [2021-05-02 20:36:24,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:36:24" (3/4) ... [2021-05-02 20:36:24,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d130ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:36:24, skipping insertion in model container [2021-05-02 20:36:24,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:36:24" (4/4) ... [2021-05-02 20:36:24,084 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_valuebound50.cJordan [2021-05-02 20:36:24,088 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:36:24,090 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:36:24,100 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:36:24,122 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:36:24,122 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:36:24,122 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:36:24,122 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:36:24,122 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:36:24,122 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:36:24,122 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:36:24,122 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:36:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:36:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:36:24,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:36:24,147 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:36:24,147 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:36:24,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:36:24,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1042421720, now seen corresponding path program 1 times [2021-05-02 20:36:24,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:36:24,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33023369] [2021-05-02 20:36:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:36:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:36:24,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:36:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:36:24,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:36:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:36:24,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:36:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:36:24,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:36:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:36:24,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:36:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:36:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:36:24,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:36:24,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33023369] [2021-05-02 20:36:24,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33023369] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:36:24,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:36:24,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:36:24,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844628916] [2021-05-02 20:36:24,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:36:24,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:36:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:36:24,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:36:24,386 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:36:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:36:24,487 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-05-02 20:36:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:36:24,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:36:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:36:24,494 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:36:24,494 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:36:24,496 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:36:24,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:36:24,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:36:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:36:24,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-05-02 20:36:24,524 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 33 [2021-05-02 20:36:24,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:36:24,524 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-05-02 20:36:24,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:36:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-05-02 20:36:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:36:24,526 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:36:24,526 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:36:24,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:36:24,527 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:36:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:36:24,528 INFO L82 PathProgramCache]: Analyzing trace with hash 104571547, now seen corresponding path program 1 times [2021-05-02 20:36:24,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:36:24,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297213507] [2021-05-02 20:36:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:36:24,559 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:36:24,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242089661] [2021-05-02 20:36:24,559 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 20:36:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:36:24,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:36:24,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:36:24,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:24,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:24,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:24,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:24,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:24,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:24,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:24,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:36:24,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:36:24,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297213507] [2021-05-02 20:36:24,918 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:36:24,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242089661] [2021-05-02 20:36:24,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242089661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:36:24,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:36:24,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:36:24,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971492729] [2021-05-02 20:36:24,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:36:24,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:36:24,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:36:24,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:36:24,923 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:36:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:36:29,116 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-05-02 20:36:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:36:29,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:36:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:36:29,118 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:36:29,118 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:36:29,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:36:29,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:36:29,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 20:36:29,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:36:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2021-05-02 20:36:29,124 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 33 [2021-05-02 20:36:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:36:29,124 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2021-05-02 20:36:29,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:36:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2021-05-02 20:36:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:36:29,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:36:29,125 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:36:29,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:36:29,345 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:36:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:36:29,345 INFO L82 PathProgramCache]: Analyzing trace with hash -844389750, now seen corresponding path program 1 times [2021-05-02 20:36:29,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:36:29,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872743550] [2021-05-02 20:36:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:36:29,355 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:36:29,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606065523] [2021-05-02 20:36:29,356 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 20:36:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:36:29,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:36:29,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:36:29,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:36:29,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:36:29,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872743550] [2021-05-02 20:36:29,603 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:36:29,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606065523] [2021-05-02 20:36:29,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606065523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:36:29,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:36:29,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:36:29,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735424171] [2021-05-02 20:36:29,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:36:29,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:36:29,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:36:29,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:36:29,604 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:36:52,738 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 20:36:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:36:59,678 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2021-05-02 20:36:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:36:59,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 20:36:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:36:59,680 INFO L225 Difference]: With dead ends: 61 [2021-05-02 20:36:59,680 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:36:59,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2107.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:36:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:36:59,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-05-02 20:36:59,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 36 states have internal predecessors, (38), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 20:36:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-05-02 20:36:59,686 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 39 [2021-05-02 20:36:59,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:36:59,686 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-05-02 20:36:59,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:36:59,686 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-05-02 20:36:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:36:59,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:36:59,687 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:36:59,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:36:59,901 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:36:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:36:59,901 INFO L82 PathProgramCache]: Analyzing trace with hash -2009827732, now seen corresponding path program 1 times [2021-05-02 20:36:59,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:36:59,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56560630] [2021-05-02 20:36:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:36:59,908 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:36:59,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822622041] [2021-05-02 20:36:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:36:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:36:59,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:36:59,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:36:59,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:59,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:02,092 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 15 [2021-05-02 20:37:02,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:02,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:02,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:02,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:02,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:02,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:02,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:02,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:02,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:02,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:02,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:02,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,201 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 20:37:04,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:37:04,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:04,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56560630] [2021-05-02 20:37:04,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:04,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822622041] [2021-05-02 20:37:04,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822622041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:37:04,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:37:04,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:37:04,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084016846] [2021-05-02 20:37:04,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:37:04,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:04,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:37:04,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:37:04,315 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:37:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:37:06,976 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2021-05-02 20:37:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:37:06,977 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-05-02 20:37:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:37:06,978 INFO L225 Difference]: With dead ends: 81 [2021-05-02 20:37:06,978 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 20:37:06,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 4171.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:37:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 20:37:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-05-02 20:37:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 47 states have (on average 1.148936170212766) internal successors, (54), 52 states have internal predecessors, (54), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (19), 14 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:37:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2021-05-02 20:37:06,985 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 47 [2021-05-02 20:37:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:37:06,985 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2021-05-02 20:37:06,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:37:06,985 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2021-05-02 20:37:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:37:06,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:06,987 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:37:07,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:07,193 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:07,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:07,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2016182430, now seen corresponding path program 2 times [2021-05-02 20:37:07,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:07,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482243656] [2021-05-02 20:37:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:07,200 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:07,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898090454] [2021-05-02 20:37:07,200 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 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 20:37:07,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:37:07,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:37:07,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:37:07,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:37:07,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:07,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:07,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:07,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:07,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:07,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:07,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:07,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:07,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:07,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:07,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:07,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:07,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:07,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 20:37:07,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:07,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482243656] [2021-05-02 20:37:07,475 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:07,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898090454] [2021-05-02 20:37:07,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898090454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:37:07,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:37:07,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:37:07,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418960595] [2021-05-02 20:37:07,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:37:07,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:07,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:37:07,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:37:07,477 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 20:37:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:37:15,357 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2021-05-02 20:37:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:37:15,358 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 54 [2021-05-02 20:37:15,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:37:15,358 INFO L225 Difference]: With dead ends: 102 [2021-05-02 20:37:15,359 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 20:37:15,359 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:37:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 20:37:15,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-05-02 20:37:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 68 states have internal predecessors, (70), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (24), 17 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:37:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-05-02 20:37:15,366 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 54 [2021-05-02 20:37:15,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:37:15,366 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-05-02 20:37:15,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 20:37:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-05-02 20:37:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:37:15,367 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:15,367 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:37:15,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:15,583 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:15,583 INFO L82 PathProgramCache]: Analyzing trace with hash 921696812, now seen corresponding path program 3 times [2021-05-02 20:37:15,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:15,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211198898] [2021-05-02 20:37:15,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:15,592 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:15,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550898716] [2021-05-02 20:37:15,592 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 20:37:15,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:37:15,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:37:15,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:37:15,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:37:15,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 20:37:15,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:15,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211198898] [2021-05-02 20:37:15,985 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:15,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550898716] [2021-05-02 20:37:15,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550898716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:37:15,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:37:15,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:37:15,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994278415] [2021-05-02 20:37:15,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:37:15,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:15,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:37:15,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:37:15,986 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:37:22,225 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-05-02 20:37:27,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:37:27,447 INFO L93 Difference]: Finished difference Result 228 states and 280 transitions. [2021-05-02 20:37:27,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:37:27,447 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 61 [2021-05-02 20:37:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:37:27,450 INFO L225 Difference]: With dead ends: 228 [2021-05-02 20:37:27,450 INFO L226 Difference]: Without dead ends: 228 [2021-05-02 20:37:27,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 4330.5ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:37:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-02 20:37:27,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 184. [2021-05-02 20:37:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 121 states have (on average 1.1487603305785123) internal successors, (139), 133 states have internal predecessors, (139), 44 states have call successors, (44), 19 states have call predecessors, (44), 18 states have return successors, (43), 31 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 20:37:27,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 226 transitions. [2021-05-02 20:37:27,463 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 226 transitions. Word has length 61 [2021-05-02 20:37:27,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:37:27,463 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 226 transitions. [2021-05-02 20:37:27,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:37:27,463 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 226 transitions. [2021-05-02 20:37:27,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:37:27,465 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:27,465 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:37:27,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:37:27,669 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:27,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:27,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1148557238, now seen corresponding path program 1 times [2021-05-02 20:37:27,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:27,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912893969] [2021-05-02 20:37:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:27,675 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:27,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799271724] [2021-05-02 20:37:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:37:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:37:27,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 20:37:27,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:37:27,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:27,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:27,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:27,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:27,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:27,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:27,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:27,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,873 WARN L205 SmtUtils]: Spent 15.94 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:37:45,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,219 WARN L205 SmtUtils]: Spent 16.26 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 20:38:02,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:02,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:14,395 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 20:38:14,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:14,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:14,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:14,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:14,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:14,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:14,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:14,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:14,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:14,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:14,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:14,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:23,822 WARN L205 SmtUtils]: Spent 7.35 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:38:41,195 WARN L205 SmtUtils]: Spent 7.04 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:38:41,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:41,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 22 proven. 38 refuted. 2 times theorem prover too weak. 54 trivial. 0 not checked. [2021-05-02 20:38:41,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:38:41,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912893969] [2021-05-02 20:38:41,245 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:38:41,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799271724] [2021-05-02 20:38:41,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799271724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:38:41,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:38:41,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:38:41,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346166553] [2021-05-02 20:38:41,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:38:41,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:38:41,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:38:41,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=163, Unknown=8, NotChecked=0, Total=210 [2021-05-02 20:38:41,246 INFO L87 Difference]: Start difference. First operand 184 states and 226 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 20:40:01,379 WARN L205 SmtUtils]: Spent 24.41 s on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 20:40:14,856 WARN L205 SmtUtils]: Spent 9.45 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-02 20:40:36,654 WARN L205 SmtUtils]: Spent 15.65 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-02 20:42:53,207 WARN L205 SmtUtils]: Spent 18.73 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 20:43:04,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:43:04,910 INFO L93 Difference]: Finished difference Result 254 states and 322 transitions. [2021-05-02 20:43:04,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:43:04,911 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 75 [2021-05-02 20:43:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:43:04,913 INFO L225 Difference]: With dead ends: 254 [2021-05-02 20:43:04,913 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 20:43:04,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 151600.7ms TimeCoverageRelationStatistics Valid=84, Invalid=365, Unknown=13, NotChecked=0, Total=462 [2021-05-02 20:43:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 20:43:04,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 242. [2021-05-02 20:43:04,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 160 states have (on average 1.1625) internal successors, (186), 175 states have internal predecessors, (186), 59 states have call successors, (59), 23 states have call predecessors, (59), 22 states have return successors, (58), 43 states have call predecessors, (58), 58 states have call successors, (58) [2021-05-02 20:43:04,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 303 transitions. [2021-05-02 20:43:04,925 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 303 transitions. Word has length 75 [2021-05-02 20:43:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:43:04,925 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 303 transitions. [2021-05-02 20:43:04,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 20:43:04,925 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 303 transitions. [2021-05-02 20:43:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 20:43:04,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:43:04,927 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:43:05,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:05,137 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:43:05,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:43:05,137 INFO L82 PathProgramCache]: Analyzing trace with hash 515075374, now seen corresponding path program 1 times [2021-05-02 20:43:05,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:43:05,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290462042] [2021-05-02 20:43:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:43:05,143 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:43:05,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523836750] [2021-05-02 20:43:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:43:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:43:05,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 2 conjunts are in the unsatisfiable core [2021-05-02 20:43:05,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:43:05,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-05-02 20:43:05,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:43:05,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290462042] [2021-05-02 20:43:05,315 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:43:05,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523836750] [2021-05-02 20:43:05,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523836750] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:43:05,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:43:05,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:43:05,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933190089] [2021-05-02 20:43:05,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:43:05,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:43:05,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:43:05,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:43:05,316 INFO L87 Difference]: Start difference. First operand 242 states and 303 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 20:43:05,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:43:05,338 INFO L93 Difference]: Finished difference Result 296 states and 378 transitions. [2021-05-02 20:43:05,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:43:05,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 82 [2021-05-02 20:43:05,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:43:05,340 INFO L225 Difference]: With dead ends: 296 [2021-05-02 20:43:05,340 INFO L226 Difference]: Without dead ends: 296 [2021-05-02 20:43:05,340 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:43:05,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-02 20:43:05,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-05-02 20:43:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 200 states have (on average 1.165) internal successors, (233), 203 states have internal predecessors, (233), 73 states have call successors, (73), 23 states have call predecessors, (73), 22 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:43:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 378 transitions. [2021-05-02 20:43:05,350 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 378 transitions. Word has length 82 [2021-05-02 20:43:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:43:05,351 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 378 transitions. [2021-05-02 20:43:05,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 20:43:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 378 transitions. [2021-05-02 20:43:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 20:43:05,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:43:05,353 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:43:05,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:05,570 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:43:05,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:43:05,571 INFO L82 PathProgramCache]: Analyzing trace with hash 341788388, now seen corresponding path program 2 times [2021-05-02 20:43:05,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:43:05,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184837800] [2021-05-02 20:43:05,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:43:05,584 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:43:05,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425544067] [2021-05-02 20:43:05,584 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 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 20:43:05,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:43:05,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:43:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:43:05,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:43:05,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-02 20:43:05,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:43:05,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184837800] [2021-05-02 20:43:05,928 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:43:05,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425544067] [2021-05-02 20:43:05,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425544067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:43:05,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:43:05,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:43:05,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662922102] [2021-05-02 20:43:05,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:43:05,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:43:05,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:43:05,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:43:05,929 INFO L87 Difference]: Start difference. First operand 296 states and 378 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 20:43:06,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:43:06,326 INFO L93 Difference]: Finished difference Result 317 states and 405 transitions. [2021-05-02 20:43:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:43:06,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 82 [2021-05-02 20:43:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:43:06,329 INFO L225 Difference]: With dead ends: 317 [2021-05-02 20:43:06,329 INFO L226 Difference]: Without dead ends: 317 [2021-05-02 20:43:06,329 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:43:06,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-02 20:43:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 307. [2021-05-02 20:43:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 207 states have (on average 1.1497584541062802) internal successors, (238), 211 states have internal predecessors, (238), 77 states have call successors, (77), 23 states have call predecessors, (77), 22 states have return successors, (76), 72 states have call predecessors, (76), 76 states have call successors, (76) [2021-05-02 20:43:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 391 transitions. [2021-05-02 20:43:06,338 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 391 transitions. Word has length 82 [2021-05-02 20:43:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:43:06,338 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 391 transitions. [2021-05-02 20:43:06,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 20:43:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 391 transitions. [2021-05-02 20:43:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:43:06,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:43:06,339 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:43:06,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:43:06,545 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:43:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:43:06,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2045268700, now seen corresponding path program 1 times [2021-05-02 20:43:06,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:43:06,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804931338] [2021-05-02 20:43:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:43:06,556 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:43:06,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419175099] [2021-05-02 20:43:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:43:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:43:06,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:43:06,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:43:06,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:06,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 61 proven. 37 refuted. 4 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 20:43:07,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:43:07,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804931338] [2021-05-02 20:43:07,848 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:43:07,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419175099] [2021-05-02 20:43:07,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419175099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:43:07,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:43:07,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:43:07,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81968338] [2021-05-02 20:43:07,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:43:07,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:43:07,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:43:07,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=180, Unknown=1, NotChecked=0, Total=210 [2021-05-02 20:43:07,849 INFO L87 Difference]: Start difference. First operand 307 states and 391 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 20:44:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:44:13,266 INFO L93 Difference]: Finished difference Result 398 states and 506 transitions. [2021-05-02 20:44:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:44:13,266 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 89 [2021-05-02 20:44:13,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:44:13,268 INFO L225 Difference]: With dead ends: 398 [2021-05-02 20:44:13,268 INFO L226 Difference]: Without dead ends: 398 [2021-05-02 20:44:13,268 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 871.9ms TimeCoverageRelationStatistics Valid=48, Invalid=293, Unknown=1, NotChecked=0, Total=342 [2021-05-02 20:44:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-05-02 20:44:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2021-05-02 20:44:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 270 states have (on average 1.151851851851852) internal successors, (311), 274 states have internal predecessors, (311), 98 states have call successors, (98), 30 states have call predecessors, (98), 29 states have return successors, (97), 93 states have call predecessors, (97), 97 states have call successors, (97) [2021-05-02 20:44:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 506 transitions. [2021-05-02 20:44:13,278 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 506 transitions. Word has length 89 [2021-05-02 20:44:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:44:13,278 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 506 transitions. [2021-05-02 20:44:13,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 20:44:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 506 transitions. [2021-05-02 20:44:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:44:13,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:44:13,279 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:44:13,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:44:13,495 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:44:13,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:44:13,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1914671820, now seen corresponding path program 2 times [2021-05-02 20:44:13,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:44:13,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780528500] [2021-05-02 20:44:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:44:13,500 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:44:13,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222512137] [2021-05-02 20:44:13,501 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:44:13,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:44:13,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:44:13,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:44:13,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:44:13,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:13,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:13,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:13,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:13,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:13,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:13,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:13,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:13,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:13,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:13,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:13,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 94 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-05-02 20:44:13,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:44:13,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780528500] [2021-05-02 20:44:13,712 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:44:13,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222512137] [2021-05-02 20:44:13,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222512137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:44:13,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:44:13,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-02 20:44:13,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215966160] [2021-05-02 20:44:13,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:44:13,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:44:13,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:44:13,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:44:13,713 INFO L87 Difference]: Start difference. First operand 398 states and 506 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:44:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:44:13,748 INFO L93 Difference]: Finished difference Result 385 states and 483 transitions. [2021-05-02 20:44:13,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:44:13,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 89 [2021-05-02 20:44:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:44:13,750 INFO L225 Difference]: With dead ends: 385 [2021-05-02 20:44:13,750 INFO L226 Difference]: Without dead ends: 241 [2021-05-02 20:44:13,750 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:44:13,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-02 20:44:13,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 223. [2021-05-02 20:44:13,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 152 states have (on average 1.0986842105263157) internal successors, (167), 157 states have internal predecessors, (167), 44 states have call successors, (44), 27 states have call predecessors, (44), 26 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 20:44:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 254 transitions. [2021-05-02 20:44:13,756 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 254 transitions. Word has length 89 [2021-05-02 20:44:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:44:13,757 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 254 transitions. [2021-05-02 20:44:13,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:44:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 254 transitions. [2021-05-02 20:44:13,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:44:13,758 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:44:13,758 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:44:13,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:44:13,960 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:44:13,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:44:13,961 INFO L82 PathProgramCache]: Analyzing trace with hash -842490076, now seen corresponding path program 3 times [2021-05-02 20:44:13,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:44:13,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224061189] [2021-05-02 20:44:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:44:13,966 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:44:13,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750305652] [2021-05-02 20:44:13,966 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:44:14,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:44:14,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:44:14,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:44:14,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:44:14,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:14,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:14,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:14,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 49 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-05-02 20:44:14,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:44:14,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224061189] [2021-05-02 20:44:14,198 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:44:14,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750305652] [2021-05-02 20:44:14,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750305652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:44:14,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:44:14,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:44:14,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930859022] [2021-05-02 20:44:14,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:44:14,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:44:14,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:44:14,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:44:14,199 INFO L87 Difference]: Start difference. First operand 223 states and 254 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-02 20:44:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:44:18,311 INFO L93 Difference]: Finished difference Result 235 states and 263 transitions. [2021-05-02 20:44:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:44:18,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2021-05-02 20:44:18,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:44:18,312 INFO L225 Difference]: With dead ends: 235 [2021-05-02 20:44:18,312 INFO L226 Difference]: Without dead ends: 235 [2021-05-02 20:44:18,312 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:44:18,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-02 20:44:18,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-05-02 20:44:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 161 states have (on average 1.093167701863354) internal successors, (176), 166 states have internal predecessors, (176), 44 states have call successors, (44), 30 states have call predecessors, (44), 29 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 20:44:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 263 transitions. [2021-05-02 20:44:18,317 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 263 transitions. Word has length 89 [2021-05-02 20:44:18,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:44:18,317 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 263 transitions. [2021-05-02 20:44:18,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-02 20:44:18,317 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 263 transitions. [2021-05-02 20:44:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 20:44:18,318 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:44:18,318 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 4, 4, 4, 4, 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, 1] [2021-05-02 20:44:18,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:44:18,533 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:44:18,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:44:18,533 INFO L82 PathProgramCache]: Analyzing trace with hash 352516930, now seen corresponding path program 4 times [2021-05-02 20:44:18,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:44:18,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946964795] [2021-05-02 20:44:18,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:44:18,539 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:44:18,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260982361] [2021-05-02 20:44:18,539 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:44:18,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:44:18,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:44:18,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 20:44:18,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:44:18,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:18,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:37,474 WARN L205 SmtUtils]: Spent 18.83 s on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2021-05-02 20:44:37,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:37,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:37,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:37,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,060 WARN L205 SmtUtils]: Spent 5.56 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 20:44:43,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:43,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,693 WARN L205 SmtUtils]: Spent 5.54 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:44:48,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:48,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:49,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:49,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:49,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:49,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:49,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:49,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:49,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:49,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:49,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:49,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 38 proven. 39 refuted. 3 times theorem prover too weak. 192 trivial. 0 not checked. [2021-05-02 20:44:52,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:44:52,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946964795] [2021-05-02 20:44:52,097 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:44:52,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260982361] [2021-05-02 20:44:52,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260982361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:44:52,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:44:52,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:44:52,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739382494] [2021-05-02 20:44:52,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:44:52,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:44:52,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:44:52,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=88, Unknown=1, NotChecked=0, Total=110 [2021-05-02 20:44:52,098 INFO L87 Difference]: Start difference. First operand 235 states and 263 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 20:45:07,883 WARN L205 SmtUtils]: Spent 6.31 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 20:45:13,539 WARN L205 SmtUtils]: Spent 5.57 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:45:19,879 WARN L205 SmtUtils]: Spent 5.56 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 20:45:31,071 WARN L205 SmtUtils]: Spent 11.12 s on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 20:45:36,789 WARN L205 SmtUtils]: Spent 5.59 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 20:45:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:36,838 INFO L93 Difference]: Finished difference Result 253 states and 287 transitions. [2021-05-02 20:45:36,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:45:36,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2021-05-02 20:45:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:36,840 INFO L225 Difference]: With dead ends: 253 [2021-05-02 20:45:36,840 INFO L226 Difference]: Without dead ends: 250 [2021-05-02 20:45:36,840 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 67305.0ms TimeCoverageRelationStatistics Valid=54, Invalid=217, Unknown=1, NotChecked=0, Total=272 [2021-05-02 20:45:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-02 20:45:36,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2021-05-02 20:45:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 170 states have (on average 1.088235294117647) internal successors, (185), 176 states have internal predecessors, (185), 49 states have call successors, (49), 30 states have call predecessors, (49), 29 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 20:45:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 282 transitions. [2021-05-02 20:45:36,845 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 282 transitions. Word has length 103 [2021-05-02 20:45:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:36,845 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 282 transitions. [2021-05-02 20:45:36,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 20:45:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 282 transitions. [2021-05-02 20:45:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:45:36,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:36,846 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:37,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:45:37,057 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:37,057 INFO L82 PathProgramCache]: Analyzing trace with hash -521691412, now seen corresponding path program 5 times [2021-05-02 20:45:37,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:37,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784045442] [2021-05-02 20:45:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:37,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:37,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906267978] [2021-05-02 20:45:37,065 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:37,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 20:45:37,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:45:37,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 20:45:37,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:37,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-05-02 20:45:37,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:37,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784045442] [2021-05-02 20:45:37,390 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:37,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906267978] [2021-05-02 20:45:37,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906267978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:37,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:37,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:45:37,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588953792] [2021-05-02 20:45:37,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:45:37,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:37,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:45:37,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:45:37,391 INFO L87 Difference]: Start difference. First operand 249 states and 282 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:45:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:37,552 INFO L93 Difference]: Finished difference Result 291 states and 342 transitions. [2021-05-02 20:45:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:45:37,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 110 [2021-05-02 20:45:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:37,555 INFO L225 Difference]: With dead ends: 291 [2021-05-02 20:45:37,555 INFO L226 Difference]: Without dead ends: 291 [2021-05-02 20:45:37,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:45:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-05-02 20:45:37,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 264. [2021-05-02 20:45:37,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 180 states have (on average 1.1055555555555556) internal successors, (199), 185 states have internal predecessors, (199), 55 states have call successors, (55), 29 states have call predecessors, (55), 28 states have return successors, (54), 49 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 20:45:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 308 transitions. [2021-05-02 20:45:37,561 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 308 transitions. Word has length 110 [2021-05-02 20:45:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:37,561 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 308 transitions. [2021-05-02 20:45:37,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:45:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 308 transitions. [2021-05-02 20:45:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:45:37,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:37,562 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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, 1] [2021-05-02 20:45:37,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:45:37,765 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:37,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1431091588, now seen corresponding path program 6 times [2021-05-02 20:45:37,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:37,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419905406] [2021-05-02 20:45:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:37,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:37,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667904132] [2021-05-02 20:45:37,771 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:38,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 20:45:38,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:45:38,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 20:45:38,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:38,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:38,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:38,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:38,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:38,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:38,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:38,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:38,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:00,076 WARN L205 SmtUtils]: Spent 18.88 s on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-05-02 20:46:05,652 WARN L205 SmtUtils]: Spent 5.56 s on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 20:46:05,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:05,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:05,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:05,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:05,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:05,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:16,423 WARN L205 SmtUtils]: Spent 10.71 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 20:46:16,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:16,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:16,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:16,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:16,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:16,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:22,139 WARN L205 SmtUtils]: Spent 5.59 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 20:46:22,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:22,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:22,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:22,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:22,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:22,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:22,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:22,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:22,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:23,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:23,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:23,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:23,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:23,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:23,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:23,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:37,000 WARN L205 SmtUtils]: Spent 13.78 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:46:51,356 WARN L205 SmtUtils]: Spent 14.14 s on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-02 20:46:51,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:51,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 20:46:51,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:46:51,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419905406] [2021-05-02 20:46:51,450 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:46:51,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667904132] [2021-05-02 20:46:51,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667904132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:46:51,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:46:51,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:46:51,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017650855] [2021-05-02 20:46:51,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:46:51,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:46:51,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:46:51,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=200, Unknown=1, NotChecked=0, Total=240 [2021-05-02 20:46:51,451 INFO L87 Difference]: Start difference. First operand 264 states and 308 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 20:46:57,133 WARN L205 SmtUtils]: Spent 5.54 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:47:18,633 WARN L205 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-02 20:49:23,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:23,688 INFO L93 Difference]: Finished difference Result 318 states and 373 transitions. [2021-05-02 20:49:23,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:49:23,690 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) Word has length 110 [2021-05-02 20:49:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:23,691 INFO L225 Difference]: With dead ends: 318 [2021-05-02 20:49:23,691 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 20:49:23,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 81234.0ms TimeCoverageRelationStatistics Valid=71, Invalid=390, Unknown=1, NotChecked=0, Total=462 [2021-05-02 20:49:23,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 20:49:23,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2021-05-02 20:49:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 217 states have (on average 1.1059907834101383) internal successors, (240), 224 states have internal predecessors, (240), 67 states have call successors, (67), 34 states have call predecessors, (67), 33 states have return successors, (66), 59 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 20:49:23,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 373 transitions. [2021-05-02 20:49:23,697 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 373 transitions. Word has length 110 [2021-05-02 20:49:23,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:23,697 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 373 transitions. [2021-05-02 20:49:23,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 20:49:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 373 transitions. [2021-05-02 20:49:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 20:49:23,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:23,698 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:23,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:23,903 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:23,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:23,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1092481430, now seen corresponding path program 7 times [2021-05-02 20:49:23,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:23,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512247458] [2021-05-02 20:49:23,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:23,908 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:23,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818028783] [2021-05-02 20:49:23,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:23,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:49:23,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:24,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 47 proven. 51 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-02 20:49:24,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:24,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512247458] [2021-05-02 20:49:24,216 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:24,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818028783] [2021-05-02 20:49:24,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818028783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:24,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:24,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:49:24,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023497374] [2021-05-02 20:49:24,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:49:24,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:24,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:49:24,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:49:24,218 INFO L87 Difference]: Start difference. First operand 318 states and 373 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 9 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-05-02 20:49:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:24,434 INFO L93 Difference]: Finished difference Result 346 states and 410 transitions. [2021-05-02 20:49:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:49:24,435 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 9 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 117 [2021-05-02 20:49:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:24,436 INFO L225 Difference]: With dead ends: 346 [2021-05-02 20:49:24,436 INFO L226 Difference]: Without dead ends: 346 [2021-05-02 20:49:24,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:49:24,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-02 20:49:24,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 303. [2021-05-02 20:49:24,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 207 states have (on average 1.0917874396135265) internal successors, (226), 214 states have internal predecessors, (226), 62 states have call successors, (62), 34 states have call predecessors, (62), 33 states have return successors, (61), 54 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-02 20:49:24,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 349 transitions. [2021-05-02 20:49:24,441 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 349 transitions. Word has length 117 [2021-05-02 20:49:24,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:24,441 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 349 transitions. [2021-05-02 20:49:24,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 9 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-05-02 20:49:24,442 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 349 transitions. [2021-05-02 20:49:24,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 20:49:24,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:24,443 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:24,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:49:24,653 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:24,654 INFO L82 PathProgramCache]: Analyzing trace with hash 613679210, now seen corresponding path program 8 times [2021-05-02 20:49:24,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:24,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510876855] [2021-05-02 20:49:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:24,661 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:24,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765899977] [2021-05-02 20:49:24,662 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:24,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:49:24,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:49:24,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:49:24,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:24,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 71 proven. 18 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-05-02 20:49:24,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:24,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510876855] [2021-05-02 20:49:24,954 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:24,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765899977] [2021-05-02 20:49:24,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765899977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:24,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:24,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:49:24,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203411342] [2021-05-02 20:49:24,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:49:24,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:24,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:49:24,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:49:24,955 INFO L87 Difference]: Start difference. First operand 303 states and 349 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 20:49:25,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:25,064 INFO L93 Difference]: Finished difference Result 304 states and 353 transitions. [2021-05-02 20:49:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:49:25,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 117 [2021-05-02 20:49:25,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:25,066 INFO L225 Difference]: With dead ends: 304 [2021-05-02 20:49:25,066 INFO L226 Difference]: Without dead ends: 304 [2021-05-02 20:49:25,066 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:49:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-02 20:49:25,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 281. [2021-05-02 20:49:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 192 states have (on average 1.078125) internal successors, (207), 198 states have internal predecessors, (207), 57 states have call successors, (57), 32 states have call predecessors, (57), 31 states have return successors, (56), 50 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-02 20:49:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 320 transitions. [2021-05-02 20:49:25,071 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 320 transitions. Word has length 117 [2021-05-02 20:49:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:25,071 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 320 transitions. [2021-05-02 20:49:25,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 20:49:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 320 transitions. [2021-05-02 20:49:25,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 20:49:25,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:25,072 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:25,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:49:25,287 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:25,288 INFO L82 PathProgramCache]: Analyzing trace with hash 465790074, now seen corresponding path program 9 times [2021-05-02 20:49:25,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:25,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991148889] [2021-05-02 20:49:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:25,292 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:25,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651672406] [2021-05-02 20:49:25,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:25,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:49:25,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:49:25,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:49:25,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:25,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:25,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:25,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:25,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:25,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:25,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,492 WARN L860 $PredicateComparison]: unable to prove that (exists ((main_~v~0 Int) (main_~r~0 Int)) (= (+ (* main_~v~0 main_~v~0) (* 4 c_main_~A~0) (* 4 main_~r~0) (* 2 c_main_~u~0)) (+ (* c_main_~u~0 c_main_~u~0) (* 2 main_~v~0)))) is different from true [2021-05-02 20:49:27,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,658 WARN L860 $PredicateComparison]: unable to prove that (exists ((main_~v~0 Int) (v_main_~r~0_65 Int) (v_main_~r~0_66 Int)) (= (+ (* main_~v~0 main_~v~0) (* 2 (* v_main_~r~0_65 c_main_~r~0)) (* 4 c_main_~A~0) (* 2 c_main_~r~0) (* 4 v_main_~r~0_66)) (+ (* 2 main_~v~0) (* c_main_~r~0 c_main_~r~0) (* v_main_~r~0_65 v_main_~r~0_65) (* 2 v_main_~r~0_65)))) is different from true [2021-05-02 20:49:35,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:37,710 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:49:37,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:37,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:37,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:37,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:37,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:39,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:39,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 112 proven. 14 refuted. 0 times theorem prover too weak. 252 trivial. 8 not checked. [2021-05-02 20:49:39,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:39,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991148889] [2021-05-02 20:49:39,774 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:39,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651672406] [2021-05-02 20:49:39,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651672406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:39,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:39,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:49:39,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686117838] [2021-05-02 20:49:39,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:49:39,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:39,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:49:39,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=42, Unknown=3, NotChecked=26, Total=90 [2021-05-02 20:49:39,775 INFO L87 Difference]: Start difference. First operand 281 states and 320 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-02 20:50:08,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:08,196 INFO L93 Difference]: Finished difference Result 311 states and 344 transitions. [2021-05-02 20:50:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:50:08,197 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 117 [2021-05-02 20:50:08,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:08,198 INFO L225 Difference]: With dead ends: 311 [2021-05-02 20:50:08,198 INFO L226 Difference]: Without dead ends: 311 [2021-05-02 20:50:08,198 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 108 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 16231.0ms TimeCoverageRelationStatistics Valid=30, Invalid=65, Unknown=3, NotChecked=34, Total=132 [2021-05-02 20:50:08,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-02 20:50:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 278. [2021-05-02 20:50:08,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 191 states have (on average 1.0732984293193717) internal successors, (205), 197 states have internal predecessors, (205), 52 states have call successors, (52), 35 states have call predecessors, (52), 34 states have return successors, (51), 45 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 20:50:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 308 transitions. [2021-05-02 20:50:08,204 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 308 transitions. Word has length 117 [2021-05-02 20:50:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:08,204 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 308 transitions. [2021-05-02 20:50:08,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-02 20:50:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 308 transitions. [2021-05-02 20:50:08,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 20:50:08,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:08,205 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:08,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:50:08,406 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:08,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:08,406 INFO L82 PathProgramCache]: Analyzing trace with hash 433027130, now seen corresponding path program 10 times [2021-05-02 20:50:08,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:08,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184503260] [2021-05-02 20:50:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:08,410 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:08,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192954322] [2021-05-02 20:50:08,410 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:08,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:50:08,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:50:08,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:50:08,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:08,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:30,306 WARN L205 SmtUtils]: Spent 18.82 s on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2021-05-02 20:50:33,295 WARN L205 SmtUtils]: Spent 2.97 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 20:50:33,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:33,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184503260] [2021-05-02 20:50:33,300 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:33,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192954322] [2021-05-02 20:50:33,300 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 20:50:33,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:33,505 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.AbstractGeneralizedAffineTerm.toTerm(AbstractGeneralizedAffineTerm.java:279) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:436) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.solveForSubject(DualJunctionDer.java:367) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:312) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:328) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.constructQuantifiedFormula(TermDomainOperationProvider.java:114) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.modularPostconditionCall(PredicateTransformer.java:178) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:174) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-02 20:50:33,508 INFO L168 Benchmark]: Toolchain (without parser) took 849909.36 ms. Allocated memory is still 190.8 MB. Free memory was 156.2 MB in the beginning and 137.9 MB in the end (delta: 18.3 MB). Peak memory consumption was 19.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:33,508 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 172.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:50:33,508 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.22 ms. Allocated memory is still 190.8 MB. Free memory was 156.0 MB in the beginning and 145.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:33,508 INFO L168 Benchmark]: Boogie Preprocessor took 57.30 ms. Allocated memory is still 190.8 MB. Free memory was 145.7 MB in the beginning and 174.2 MB in the end (delta: -28.5 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:33,508 INFO L168 Benchmark]: RCFGBuilder took 246.81 ms. Allocated memory is still 190.8 MB. Free memory was 174.2 MB in the beginning and 157.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:33,508 INFO L168 Benchmark]: IcfgTransformer took 13.66 ms. Allocated memory is still 190.8 MB. Free memory was 157.4 MB in the beginning and 156.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:33,508 INFO L168 Benchmark]: TraceAbstraction took 849426.84 ms. Allocated memory is still 190.8 MB. Free memory was 155.8 MB in the beginning and 137.9 MB in the end (delta: 18.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:33,509 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 172.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 160.22 ms. Allocated memory is still 190.8 MB. Free memory was 156.0 MB in the beginning and 145.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 57.30 ms. Allocated memory is still 190.8 MB. Free memory was 145.7 MB in the beginning and 174.2 MB in the end (delta: -28.5 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 246.81 ms. Allocated memory is still 190.8 MB. Free memory was 174.2 MB in the beginning and 157.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.66 ms. Allocated memory is still 190.8 MB. Free memory was 157.4 MB in the beginning and 156.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 849426.84 ms. Allocated memory is still 190.8 MB. Free memory was 155.8 MB in the beginning and 137.9 MB in the end (delta: 18.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.AbstractGeneralizedAffineTerm.toTerm(AbstractGeneralizedAffineTerm.java:279) RESULT: Ultimate could not prove your program: Toolchain returned no result. [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...