/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/egcd-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:18:01,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:18:01,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:18:01,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:18:01,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:18:01,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:18:01,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:18:01,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:18:01,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:18:01,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:18:01,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:18:01,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:18:01,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:18:01,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:18:01,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:18:01,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:18:01,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:18:01,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:18:01,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:18:01,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:18:01,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:18:01,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:18:01,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:18:01,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:18:01,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 20:18:01,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 20:18:01,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 20:18:01,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 20:18:01,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 20:18:01,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 20:18:01,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 20:18:01,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 20:18:01,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 20:18:01,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 20:18:01,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 20:18:01,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 20:18:01,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 20:18:01,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 20:18:01,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:18:01,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:18:01,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:18:01,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:18:01,176 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:18:01,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:18:01,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:18:01,179 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:18:01,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:18:01,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:18:01,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:18:01,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:18:01,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:18:01,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:18:01,180 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:18:01,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:18:01,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:18:01,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:18:01,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:18:01,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:18:01,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:18:01,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:18:01,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:18:01,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:18:01,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:18:01,181 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:18:01,181 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:18:01,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:18:01,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:18:01,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:18:01,459 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:18:01,466 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:18:01,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c [2021-05-02 20:18:01,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf48004a1/1ce2790be5984c2bb4057bb5fb3a642d/FLAG07b575983 [2021-05-02 20:18:01,875 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:18:01,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c [2021-05-02 20:18:01,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf48004a1/1ce2790be5984c2bb4057bb5fb3a642d/FLAG07b575983 [2021-05-02 20:18:02,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf48004a1/1ce2790be5984c2bb4057bb5fb3a642d [2021-05-02 20:18:02,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:18:02,317 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:18:02,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:18:02,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:18:02,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:18:02,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:18:02" (1/1) ... [2021-05-02 20:18:02,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a27fbbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:02, skipping insertion in model container [2021-05-02 20:18:02,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:18:02" (1/1) ... [2021-05-02 20:18:02,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:18:02,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:18:02,435 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/egcd-ll_unwindbound5.c[489,502] [2021-05-02 20:18:02,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:18:02,449 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:18:02,460 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/egcd-ll_unwindbound5.c[489,502] [2021-05-02 20:18:02,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:18:02,530 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:18:02,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:02 WrapperNode [2021-05-02 20:18:02,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:18:02,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:18:02,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:18:02,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:18:02,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:02" (1/1) ... [2021-05-02 20:18:02,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:02" (1/1) ... [2021-05-02 20:18:02,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:02" (1/1) ... [2021-05-02 20:18:02,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:02" (1/1) ... [2021-05-02 20:18:02,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:02" (1/1) ... [2021-05-02 20:18:02,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:02" (1/1) ... [2021-05-02 20:18:02,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:02" (1/1) ... [2021-05-02 20:18:02,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:18:02,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:18:02,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:18:02,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:18:02,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:02" (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 20:18:02,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:18:02,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:18:02,688 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:18:02,688 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:18:02,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:18:02,688 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:18:02,688 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:18:02,688 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:18:02,689 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:18:02,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:18:02,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:18:02,689 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:18:02,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:18:02,689 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:18:02,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:18:02,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:18:02,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:18:02,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:18:02,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:18:02,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:18:02,888 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:18:02,889 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:18:02,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:02 BoogieIcfgContainer [2021-05-02 20:18:02,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:18:02,890 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:18:02,890 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:18:02,890 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:18:02,892 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:02" (1/1) ... [2021-05-02 20:18:02,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:18:02 BasicIcfg [2021-05-02 20:18:02,903 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:18:02,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:18:02,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:18:02,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:18:02,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:18:02" (1/4) ... [2021-05-02 20:18:02,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168d4442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:18:02, skipping insertion in model container [2021-05-02 20:18:02,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:02" (2/4) ... [2021-05-02 20:18:02,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168d4442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:18:02, skipping insertion in model container [2021-05-02 20:18:02,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:02" (3/4) ... [2021-05-02 20:18:02,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168d4442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:18:02, skipping insertion in model container [2021-05-02 20:18:02,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:18:02" (4/4) ... [2021-05-02 20:18:02,908 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound5.cJordan [2021-05-02 20:18:02,911 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:18:02,914 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:18:02,925 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:18:02,936 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:18:02,936 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:18:02,936 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:18:02,936 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:18:02,936 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:18:02,936 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:18:02,936 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:18:02,936 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:18:02,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:18:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:18:02,948 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:02,948 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:02,948 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:02,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:02,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2021-05-02 20:18:02,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:02,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271150121] [2021-05-02 20:18:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:03,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:18:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:03,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:18:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:03,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:18:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:18:03,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:03,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271150121] [2021-05-02 20:18:03,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271150121] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:03,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:03,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:18:03,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27192631] [2021-05-02 20:18:03,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:18:03,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:03,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:18:03,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:18:03,117 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:18:03,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:03,205 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-05-02 20:18:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:18:03,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-02 20:18:03,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:03,211 INFO L225 Difference]: With dead ends: 36 [2021-05-02 20:18:03,211 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 20:18:03,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:18:03,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 20:18:03,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-02 20:18:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:18:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-02 20:18:03,235 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-02 20:18:03,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:03,236 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-02 20:18:03,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:18:03,236 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-02 20:18:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:18:03,237 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:03,237 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:03,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:18:03,237 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:03,238 INFO L82 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2021-05-02 20:18:03,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:03,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55020670] [2021-05-02 20:18:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:03,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:18:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:03,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:18:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:03,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:18:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:18:03,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:03,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55020670] [2021-05-02 20:18:03,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55020670] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:03,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:03,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:18:03,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753134444] [2021-05-02 20:18:03,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:18:03,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:03,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:18:03,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:18:03,318 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:18:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:03,415 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-05-02 20:18:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:18:03,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:18:03,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:03,416 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:18:03,416 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:18:03,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:18:03,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:18:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:18:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:18:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 20:18:03,421 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-02 20:18:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:03,421 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 20:18:03,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:18:03,421 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 20:18:03,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:18:03,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:03,422 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:03,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:18:03,422 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:03,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:03,423 INFO L82 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2021-05-02 20:18:03,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:03,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816606308] [2021-05-02 20:18:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:03,432 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:03,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701096090] [2021-05-02 20:18:03,432 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 20:18:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:03,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:18:03,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:03,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:18:03,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:03,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816606308] [2021-05-02 20:18:03,579 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:03,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701096090] [2021-05-02 20:18:03,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701096090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:03,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:03,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:18:03,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209978325] [2021-05-02 20:18:03,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:18:03,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:03,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:18:03,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:18:03,581 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:18:03,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:03,647 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-05-02 20:18:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:18:03,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-02 20:18:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:03,648 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:18:03,648 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 20:18:03,648 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:03,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 20:18:03,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-02 20:18:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:18:03,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-02 20:18:03,655 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-02 20:18:03,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:03,655 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-02 20:18:03,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:18:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-02 20:18:03,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:18:03,656 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:03,656 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:03,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 20:18:03,872 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:03,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:03,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2021-05-02 20:18:03,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:03,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261306676] [2021-05-02 20:18:03,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:03,881 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:03,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10224760] [2021-05-02 20:18:03,882 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 20:18:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:03,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:18:03,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:03,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:03,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:18:04,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:04,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261306676] [2021-05-02 20:18:04,059 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:04,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10224760] [2021-05-02 20:18:04,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10224760] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:04,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:04,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:18:04,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693482173] [2021-05-02 20:18:04,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:18:04,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:04,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:18:04,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:04,061 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:18:04,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:04,168 INFO L93 Difference]: Finished difference Result 69 states and 102 transitions. [2021-05-02 20:18:04,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:18:04,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 20:18:04,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:04,174 INFO L225 Difference]: With dead ends: 69 [2021-05-02 20:18:04,174 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 20:18:04,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:04,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 20:18:04,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-02 20:18:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:18:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-02 20:18:04,187 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-02 20:18:04,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:04,187 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-02 20:18:04,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:18:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-02 20:18:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:18:04,189 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:04,189 INFO L523 BasicCegarLoop]: trace histogram [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, 1] [2021-05-02 20:18:04,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:04,405 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:04,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:04,406 INFO L82 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2021-05-02 20:18:04,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:04,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447514997] [2021-05-02 20:18:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:04,414 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:04,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902193211] [2021-05-02 20:18:04,414 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 20:18:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:04,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:18:04,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:04,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:18:04,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:04,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447514997] [2021-05-02 20:18:04,577 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:04,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902193211] [2021-05-02 20:18:04,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902193211] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:04,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:04,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:18:04,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254093336] [2021-05-02 20:18:04,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:18:04,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:04,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:18:04,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:04,579 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:18:04,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:04,662 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-05-02 20:18:04,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:18:04,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-05-02 20:18:04,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:04,664 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:18:04,664 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 20:18:04,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:04,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 20:18:04,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 20:18:04,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:18:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-02 20:18:04,669 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-02 20:18:04,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:04,669 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-02 20:18:04,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:18:04,669 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-02 20:18:04,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:18:04,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:04,670 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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 20:18:04,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:04,885 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:04,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:04,886 INFO L82 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2021-05-02 20:18:04,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:04,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720368197] [2021-05-02 20:18:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:04,893 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:04,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377457299] [2021-05-02 20:18:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:04,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:18:04,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:18:05,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:05,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720368197] [2021-05-02 20:18:05,029 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:05,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377457299] [2021-05-02 20:18:05,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377457299] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:05,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:05,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:18:05,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438983650] [2021-05-02 20:18:05,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:18:05,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:05,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:18:05,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:18:05,030 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:18:05,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:05,055 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2021-05-02 20:18:05,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:18:05,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-02 20:18:05,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:05,057 INFO L225 Difference]: With dead ends: 75 [2021-05-02 20:18:05,058 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 20:18:05,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:18:05,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 20:18:05,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-02 20:18:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:18:05,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-02 20:18:05,062 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-02 20:18:05,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:05,063 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-02 20:18:05,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:18:05,063 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-02 20:18:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:18:05,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:05,064 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 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 20:18:05,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:05,280 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:05,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:05,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2021-05-02 20:18:05,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:05,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131380942] [2021-05-02 20:18:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:05,288 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:05,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796058277] [2021-05-02 20:18:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:18:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:05,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:18:05,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:05,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:05,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:05,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:05,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:05,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:05,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:05,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:05,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:18:05,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:05,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131380942] [2021-05-02 20:18:05,413 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:05,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796058277] [2021-05-02 20:18:05,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796058277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:05,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:05,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:18:05,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584734792] [2021-05-02 20:18:05,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:18:05,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:05,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:18:05,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:18:05,414 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:18:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:05,445 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2021-05-02 20:18:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:18:05,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-02 20:18:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:05,447 INFO L225 Difference]: With dead ends: 99 [2021-05-02 20:18:05,447 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 20:18:05,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:18:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 20:18:05,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-02 20:18:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 20:18:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-02 20:18:05,452 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-02 20:18:05,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:05,452 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-02 20:18:05,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:18:05,453 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-02 20:18:05,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:18:05,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:05,453 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:05,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 20:18:05,670 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:05,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:05,670 INFO L82 PathProgramCache]: Analyzing trace with hash -739890515, now seen corresponding path program 1 times [2021-05-02 20:18:05,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:05,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554500890] [2021-05-02 20:18:05,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:05,691 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:05,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104363193] [2021-05-02 20:18:05,691 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 20:18:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:05,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:18:05,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:05,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:18:05,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:05,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554500890] [2021-05-02 20:18:05,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:05,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104363193] [2021-05-02 20:18:05,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104363193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:05,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:05,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:18:05,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108695623] [2021-05-02 20:18:05,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:18:05,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:05,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:18:05,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:18:05,835 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:18:05,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:05,887 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2021-05-02 20:18:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:18:05,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2021-05-02 20:18:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:05,888 INFO L225 Difference]: With dead ends: 104 [2021-05-02 20:18:05,888 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 20:18:05,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:05,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 20:18:05,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 20:18:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 20:18:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-02 20:18:05,894 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-02 20:18:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:05,894 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-02 20:18:05,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:18:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-02 20:18:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 20:18:05,895 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:05,895 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1] [2021-05-02 20:18:06,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:06,114 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:06,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:06,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1527150038, now seen corresponding path program 1 times [2021-05-02 20:18:06,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:06,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385125031] [2021-05-02 20:18:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:06,120 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:06,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379555848] [2021-05-02 20:18:06,120 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 20:18:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:06,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:18:06,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:06,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:06,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:18:06,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:06,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385125031] [2021-05-02 20:18:06,267 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:06,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379555848] [2021-05-02 20:18:06,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379555848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:06,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:06,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:18:06,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666888025] [2021-05-02 20:18:06,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:18:06,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:06,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:18:06,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:06,268 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:18:06,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:06,363 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-02 20:18:06,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:18:06,364 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 20:18:06,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:06,365 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:18:06,365 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 20:18:06,365 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:06,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 20:18:06,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-02 20:18:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 20:18:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-02 20:18:06,370 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-02 20:18:06,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:06,371 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-02 20:18:06,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:18:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-02 20:18:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:18:06,371 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:06,371 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 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] [2021-05-02 20:18:06,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:06,587 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:06,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:06,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1237367986, now seen corresponding path program 1 times [2021-05-02 20:18:06,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:06,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754808812] [2021-05-02 20:18:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:06,594 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:06,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654533333] [2021-05-02 20:18:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:18:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:06,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:18:06,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:06,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:06,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:06,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:06,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:06,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:06,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:06,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:06,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:06,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:06,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:06,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:06,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:18:06,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:06,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754808812] [2021-05-02 20:18:06,790 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:06,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654533333] [2021-05-02 20:18:06,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654533333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:06,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:06,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:18:06,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495276534] [2021-05-02 20:18:06,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:18:06,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:06,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:18:06,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:06,791 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:18:06,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:06,952 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2021-05-02 20:18:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:18:06,952 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-05-02 20:18:06,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:06,953 INFO L225 Difference]: With dead ends: 129 [2021-05-02 20:18:06,954 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 20:18:06,954 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:18:06,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 20:18:06,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-02 20:18:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 20:18:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-02 20:18:06,959 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-02 20:18:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:06,959 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-02 20:18:06,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:18:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-02 20:18:06,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 20:18:06,960 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:06,960 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:07,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 20:18:07,178 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:07,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:07,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1023588343, now seen corresponding path program 2 times [2021-05-02 20:18:07,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:07,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772069806] [2021-05-02 20:18:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:07,185 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:07,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527235234] [2021-05-02 20:18:07,185 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 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 20:18:07,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:07,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:07,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:18:07,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:07,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-05-02 20:18:07,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:07,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772069806] [2021-05-02 20:18:07,375 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:07,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527235234] [2021-05-02 20:18:07,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527235234] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:07,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:07,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:18:07,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094598406] [2021-05-02 20:18:07,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:18:07,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:07,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:18:07,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:07,376 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:18:07,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:07,484 INFO L93 Difference]: Finished difference Result 149 states and 201 transitions. [2021-05-02 20:18:07,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:18:07,484 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2021-05-02 20:18:07,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:07,485 INFO L225 Difference]: With dead ends: 149 [2021-05-02 20:18:07,485 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 20:18:07,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:07,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 20:18:07,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 20:18:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 20:18:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-02 20:18:07,492 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-02 20:18:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:07,492 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-02 20:18:07,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:18:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-02 20:18:07,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:18:07,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:07,493 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:07,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:07,711 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:07,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:07,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1153573054, now seen corresponding path program 2 times [2021-05-02 20:18:07,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:07,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63104903] [2021-05-02 20:18:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:07,717 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:07,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148134714] [2021-05-02 20:18:07,717 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 20:18:07,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:07,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:07,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:18:07,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:07,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:18:07,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:07,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63104903] [2021-05-02 20:18:07,866 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:07,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148134714] [2021-05-02 20:18:07,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148134714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:07,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:07,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:18:07,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592726949] [2021-05-02 20:18:07,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:18:07,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:07,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:18:07,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:18:07,867 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:18:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:07,905 INFO L93 Difference]: Finished difference Result 173 states and 215 transitions. [2021-05-02 20:18:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:18:07,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 20:18:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:07,907 INFO L225 Difference]: With dead ends: 173 [2021-05-02 20:18:07,907 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 20:18:07,907 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:18:07,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 20:18:07,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-02 20:18:07,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 20:18:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2021-05-02 20:18:07,912 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2021-05-02 20:18:07,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:07,912 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2021-05-02 20:18:07,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:18:07,912 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2021-05-02 20:18:07,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:18:07,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:07,913 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:08,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:08,129 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:08,129 INFO L82 PathProgramCache]: Analyzing trace with hash -264996897, now seen corresponding path program 1 times [2021-05-02 20:18:08,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:08,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060287660] [2021-05-02 20:18:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:08,135 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:08,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558493486] [2021-05-02 20:18:08,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:18:08,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:08,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 20:18:08,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:08,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060287660] [2021-05-02 20:18:08,340 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:08,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558493486] [2021-05-02 20:18:08,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558493486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:08,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:08,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:18:08,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788562179] [2021-05-02 20:18:08,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:18:08,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:08,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:18:08,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:08,342 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:18:08,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:08,485 INFO L93 Difference]: Finished difference Result 186 states and 235 transitions. [2021-05-02 20:18:08,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:18:08,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 20:18:08,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:08,487 INFO L225 Difference]: With dead ends: 186 [2021-05-02 20:18:08,487 INFO L226 Difference]: Without dead ends: 186 [2021-05-02 20:18:08,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:18:08,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-02 20:18:08,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-02 20:18:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 118 states have internal predecessors, (128), 54 states have call successors, (54), 22 states have call predecessors, (54), 21 states have return successors, (50), 43 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 20:18:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-02 20:18:08,492 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 61 [2021-05-02 20:18:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:08,493 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-02 20:18:08,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:18:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-02 20:18:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:18:08,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:08,493 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:08,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:18:08,709 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:08,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1121480771, now seen corresponding path program 2 times [2021-05-02 20:18:08,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:08,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488974352] [2021-05-02 20:18:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:08,715 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:08,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302297688] [2021-05-02 20:18:08,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:08,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:08,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:08,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:18:08,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:08,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 20:18:08,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:08,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488974352] [2021-05-02 20:18:08,903 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:08,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302297688] [2021-05-02 20:18:08,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302297688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:08,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:08,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:18:08,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225827617] [2021-05-02 20:18:08,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:18:08,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:08,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:18:08,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:08,904 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:18:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:09,079 INFO L93 Difference]: Finished difference Result 196 states and 250 transitions. [2021-05-02 20:18:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:18:09,079 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 20:18:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:09,080 INFO L225 Difference]: With dead ends: 196 [2021-05-02 20:18:09,080 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 20:18:09,080 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:18:09,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 20:18:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 20:18:09,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 122 states have internal predecessors, (132), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (53), 46 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 20:18:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 242 transitions. [2021-05-02 20:18:09,085 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 242 transitions. Word has length 61 [2021-05-02 20:18:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:09,085 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 242 transitions. [2021-05-02 20:18:09,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:18:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 242 transitions. [2021-05-02 20:18:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 20:18:09,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:09,086 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:09,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:18:09,301 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:09,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:09,302 INFO L82 PathProgramCache]: Analyzing trace with hash -718576292, now seen corresponding path program 2 times [2021-05-02 20:18:09,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:09,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763571567] [2021-05-02 20:18:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:09,307 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:09,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809652664] [2021-05-02 20:18:09,307 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 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 20:18:09,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:09,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:09,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 20:18:09,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:09,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 20:18:09,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:09,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763571567] [2021-05-02 20:18:09,549 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:09,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809652664] [2021-05-02 20:18:09,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809652664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:09,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:09,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:18:09,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875907452] [2021-05-02 20:18:09,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:18:09,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:09,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:18:09,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:18:09,550 INFO L87 Difference]: Start difference. First operand 192 states and 242 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:18:09,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:09,786 INFO L93 Difference]: Finished difference Result 217 states and 279 transitions. [2021-05-02 20:18:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:18:09,787 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 66 [2021-05-02 20:18:09,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:09,788 INFO L225 Difference]: With dead ends: 217 [2021-05-02 20:18:09,788 INFO L226 Difference]: Without dead ends: 217 [2021-05-02 20:18:09,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:18:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-02 20:18:09,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2021-05-02 20:18:09,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 134 states have internal predecessors, (148), 63 states have call successors, (63), 25 states have call predecessors, (63), 24 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 20:18:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2021-05-02 20:18:09,794 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 66 [2021-05-02 20:18:09,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:09,794 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2021-05-02 20:18:09,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:18:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2021-05-02 20:18:09,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 20:18:09,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:09,795 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:10,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 20:18:10,010 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:10,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:10,010 INFO L82 PathProgramCache]: Analyzing trace with hash -367776355, now seen corresponding path program 3 times [2021-05-02 20:18:10,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:10,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281545471] [2021-05-02 20:18:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:10,015 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:10,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704227469] [2021-05-02 20:18:10,016 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 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 20:18:10,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:18:10,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:10,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:18:10,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:10,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 20:18:10,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:10,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281545471] [2021-05-02 20:18:10,238 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:10,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704227469] [2021-05-02 20:18:10,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704227469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:10,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:10,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:18:10,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647344120] [2021-05-02 20:18:10,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:18:10,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:10,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:18:10,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:10,240 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:18:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:10,414 INFO L93 Difference]: Finished difference Result 233 states and 300 transitions. [2021-05-02 20:18:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:18:10,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-02 20:18:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:10,416 INFO L225 Difference]: With dead ends: 233 [2021-05-02 20:18:10,416 INFO L226 Difference]: Without dead ends: 233 [2021-05-02 20:18:10,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:10,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-02 20:18:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2021-05-02 20:18:10,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 138 states have internal predecessors, (153), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 20:18:10,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2021-05-02 20:18:10,421 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 66 [2021-05-02 20:18:10,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:10,421 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2021-05-02 20:18:10,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:18:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2021-05-02 20:18:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 20:18:10,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:10,422 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:10,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:10,638 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:10,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:10,638 INFO L82 PathProgramCache]: Analyzing trace with hash 876232379, now seen corresponding path program 4 times [2021-05-02 20:18:10,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:10,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12438119] [2021-05-02 20:18:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:10,643 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:10,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298324842] [2021-05-02 20:18:10,643 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 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 20:18:10,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:18:10,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:10,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 20:18:10,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:10,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:10,976 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 20:18:10,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:10,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12438119] [2021-05-02 20:18:10,976 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:10,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298324842] [2021-05-02 20:18:10,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298324842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:10,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:10,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:18:10,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571786675] [2021-05-02 20:18:10,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:18:10,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:10,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:18:10,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:18:10,978 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:18:11,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:11,253 INFO L93 Difference]: Finished difference Result 240 states and 308 transitions. [2021-05-02 20:18:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:18:11,253 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-02 20:18:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:11,254 INFO L225 Difference]: With dead ends: 240 [2021-05-02 20:18:11,254 INFO L226 Difference]: Without dead ends: 235 [2021-05-02 20:18:11,255 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:18:11,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-02 20:18:11,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2021-05-02 20:18:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 115 states have (on average 1.182608695652174) internal successors, (136), 124 states have internal predecessors, (136), 54 states have call successors, (54), 24 states have call predecessors, (54), 23 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 20:18:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 240 transitions. [2021-05-02 20:18:11,259 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 240 transitions. Word has length 71 [2021-05-02 20:18:11,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:11,260 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 240 transitions. [2021-05-02 20:18:11,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:18:11,260 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 240 transitions. [2021-05-02 20:18:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 20:18:11,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:11,260 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:11,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:18:11,476 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:11,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:11,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1468434662, now seen corresponding path program 3 times [2021-05-02 20:18:11,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:11,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328637963] [2021-05-02 20:18:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:11,482 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:11,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805570424] [2021-05-02 20:18:11,482 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 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 20:18:11,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:18:11,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:11,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 20:18:11,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:11,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 20:18:11,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:11,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328637963] [2021-05-02 20:18:11,755 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:11,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805570424] [2021-05-02 20:18:11,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805570424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:11,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:11,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:18:11,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407436764] [2021-05-02 20:18:11,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:18:11,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:11,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:18:11,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:11,756 INFO L87 Difference]: Start difference. First operand 193 states and 240 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:18:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:11,960 INFO L93 Difference]: Finished difference Result 218 states and 283 transitions. [2021-05-02 20:18:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:18:11,960 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-02 20:18:11,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:11,961 INFO L225 Difference]: With dead ends: 218 [2021-05-02 20:18:11,961 INFO L226 Difference]: Without dead ends: 214 [2021-05-02 20:18:11,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-02 20:18:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2021-05-02 20:18:11,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 133 states have internal predecessors, (149), 60 states have call successors, (60), 25 states have call predecessors, (60), 24 states have return successors, (56), 50 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-02 20:18:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 265 transitions. [2021-05-02 20:18:11,966 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 265 transitions. Word has length 71 [2021-05-02 20:18:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:11,966 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 265 transitions. [2021-05-02 20:18:11,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:18:11,967 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 265 transitions. [2021-05-02 20:18:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:18:11,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:11,967 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:12,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:18:12,183 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:12,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:12,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1531334864, now seen corresponding path program 3 times [2021-05-02 20:18:12,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:12,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61369154] [2021-05-02 20:18:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:12,189 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:12,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920495086] [2021-05-02 20:18:12,189 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 20:18:12,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:18:12,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:12,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:18:12,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:12,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:12,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:12,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:12,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:12,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:12,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:12,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:12,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:12,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:12,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:12,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:12,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:12,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:12,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 20:18:12,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:12,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61369154] [2021-05-02 20:18:12,386 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:12,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920495086] [2021-05-02 20:18:12,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920495086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:12,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:12,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:18:12,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488140436] [2021-05-02 20:18:12,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:18:12,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:12,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:18:12,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:18:12,388 INFO L87 Difference]: Start difference. First operand 209 states and 265 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:18:12,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:12,444 INFO L93 Difference]: Finished difference Result 243 states and 293 transitions. [2021-05-02 20:18:12,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:18:12,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-02 20:18:12,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:12,446 INFO L225 Difference]: With dead ends: 243 [2021-05-02 20:18:12,446 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 20:18:12,446 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:12,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 20:18:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-05-02 20:18:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 152 states have internal predecessors, (165), 57 states have call successors, (57), 30 states have call predecessors, (57), 29 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 20:18:12,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2021-05-02 20:18:12,452 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 80 [2021-05-02 20:18:12,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:12,452 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2021-05-02 20:18:12,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:18:12,453 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2021-05-02 20:18:12,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:18:12,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:12,453 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:12,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 20:18:12,666 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:12,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:12,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1875056275, now seen corresponding path program 5 times [2021-05-02 20:18:12,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:12,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084323107] [2021-05-02 20:18:12,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:12,675 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:12,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276282582] [2021-05-02 20:18:12,675 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 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 20:18:13,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 20:18:13,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:13,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 20:18:13,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:13,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 20 proven. 45 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-05-02 20:18:13,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:13,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084323107] [2021-05-02 20:18:13,957 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:13,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276282582] [2021-05-02 20:18:13,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276282582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:13,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:13,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:18:13,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367953199] [2021-05-02 20:18:13,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:18:13,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:13,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:18:13,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:13,958 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:18:14,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:14,082 INFO L93 Difference]: Finished difference Result 264 states and 326 transitions. [2021-05-02 20:18:14,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:18:14,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 80 [2021-05-02 20:18:14,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:14,083 INFO L225 Difference]: With dead ends: 264 [2021-05-02 20:18:14,083 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 20:18:14,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:14,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 20:18:14,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 250. [2021-05-02 20:18:14,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 163 states have internal predecessors, (177), 67 states have call successors, (67), 31 states have call predecessors, (67), 30 states have return successors, (63), 55 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-02 20:18:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2021-05-02 20:18:14,090 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 80 [2021-05-02 20:18:14,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:14,091 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2021-05-02 20:18:14,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:18:14,092 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2021-05-02 20:18:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:18:14,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:14,092 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:14,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 20:18:14,301 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:14,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:14,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1563427147, now seen corresponding path program 6 times [2021-05-02 20:18:14,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:14,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353741503] [2021-05-02 20:18:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:14,308 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:14,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686865328] [2021-05-02 20:18:14,308 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:14,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-02 20:18:14,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:14,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:18:14,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:14,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 10 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-02 20:18:14,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:14,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353741503] [2021-05-02 20:18:14,561 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:14,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686865328] [2021-05-02 20:18:14,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686865328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:14,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:14,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:18:14,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046505835] [2021-05-02 20:18:14,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:18:14,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:14,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:18:14,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:14,562 INFO L87 Difference]: Start difference. First operand 250 states and 307 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:18:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:18,895 INFO L93 Difference]: Finished difference Result 296 states and 371 transitions. [2021-05-02 20:18:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:18:18,895 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 80 [2021-05-02 20:18:18,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:18,897 INFO L225 Difference]: With dead ends: 296 [2021-05-02 20:18:18,897 INFO L226 Difference]: Without dead ends: 293 [2021-05-02 20:18:18,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:18:18,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-02 20:18:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 281. [2021-05-02 20:18:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 171 states have (on average 1.1637426900584795) internal successors, (199), 182 states have internal predecessors, (199), 76 states have call successors, (76), 34 states have call predecessors, (76), 33 states have return successors, (72), 64 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:18:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 347 transitions. [2021-05-02 20:18:18,904 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 347 transitions. Word has length 80 [2021-05-02 20:18:18,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:18,904 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 347 transitions. [2021-05-02 20:18:18,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:18:18,904 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 347 transitions. [2021-05-02 20:18:18,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:18:18,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:18,905 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:19,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 20:18:19,122 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:19,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:19,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1844036468, now seen corresponding path program 7 times [2021-05-02 20:18:19,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:19,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396156105] [2021-05-02 20:18:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:19,127 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:19,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193001946] [2021-05-02 20:18:19,128 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:19,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:18:19,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:19,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 20:18:19,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:19,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396156105] [2021-05-02 20:18:19,374 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:19,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193001946] [2021-05-02 20:18:19,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193001946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:19,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:19,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:18:19,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879358084] [2021-05-02 20:18:19,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:18:19,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:19,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:18:19,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:19,376 INFO L87 Difference]: Start difference. First operand 281 states and 347 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:18:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:19,600 INFO L93 Difference]: Finished difference Result 300 states and 372 transitions. [2021-05-02 20:18:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:18:19,600 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-02 20:18:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:19,601 INFO L225 Difference]: With dead ends: 300 [2021-05-02 20:18:19,601 INFO L226 Difference]: Without dead ends: 300 [2021-05-02 20:18:19,602 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:18:19,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-02 20:18:19,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 288. [2021-05-02 20:18:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 176 states have (on average 1.1590909090909092) internal successors, (204), 188 states have internal predecessors, (204), 77 states have call successors, (77), 35 states have call predecessors, (77), 34 states have return successors, (73), 64 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 20:18:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 354 transitions. [2021-05-02 20:18:19,609 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 354 transitions. Word has length 80 [2021-05-02 20:18:19,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:19,609 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 354 transitions. [2021-05-02 20:18:19,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:18:19,609 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 354 transitions. [2021-05-02 20:18:19,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:18:19,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:19,610 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:19,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 20:18:19,825 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:19,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:19,825 INFO L82 PathProgramCache]: Analyzing trace with hash -168333139, now seen corresponding path program 8 times [2021-05-02 20:18:19,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:19,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343838103] [2021-05-02 20:18:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:19,835 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:19,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019144595] [2021-05-02 20:18:19,835 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:19,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:19,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:19,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:18:19,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:19,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:19,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 20:18:20,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:20,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343838103] [2021-05-02 20:18:20,097 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:20,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019144595] [2021-05-02 20:18:20,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019144595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:20,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:20,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:18:20,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906583440] [2021-05-02 20:18:20,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:18:20,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:20,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:18:20,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:20,098 INFO L87 Difference]: Start difference. First operand 288 states and 354 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:18:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:20,298 INFO L93 Difference]: Finished difference Result 297 states and 366 transitions. [2021-05-02 20:18:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:18:20,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-02 20:18:20,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:20,300 INFO L225 Difference]: With dead ends: 297 [2021-05-02 20:18:20,300 INFO L226 Difference]: Without dead ends: 297 [2021-05-02 20:18:20,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:18:20,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-02 20:18:20,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2021-05-02 20:18:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 179 states have (on average 1.1564245810055866) internal successors, (207), 192 states have internal predecessors, (207), 78 states have call successors, (78), 36 states have call predecessors, (78), 35 states have return successors, (74), 64 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 20:18:20,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 359 transitions. [2021-05-02 20:18:20,306 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 359 transitions. Word has length 80 [2021-05-02 20:18:20,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:20,306 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 359 transitions. [2021-05-02 20:18:20,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:18:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 359 transitions. [2021-05-02 20:18:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:18:20,307 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:20,307 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:20,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:18:20,522 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:20,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:20,522 INFO L82 PathProgramCache]: Analyzing trace with hash 719170542, now seen corresponding path program 9 times [2021-05-02 20:18:20,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:20,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229549490] [2021-05-02 20:18:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:20,527 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:20,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998313061] [2021-05-02 20:18:20,527 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:20,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:18:20,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:20,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:18:20,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:20,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 55 proven. 13 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-02 20:18:20,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:20,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229549490] [2021-05-02 20:18:20,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:20,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998313061] [2021-05-02 20:18:20,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998313061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:20,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:20,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:18:20,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087535981] [2021-05-02 20:18:20,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:18:20,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:20,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:18:20,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:20,734 INFO L87 Difference]: Start difference. First operand 293 states and 359 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:18:25,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:25,017 INFO L93 Difference]: Finished difference Result 314 states and 389 transitions. [2021-05-02 20:18:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:18:25,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 80 [2021-05-02 20:18:25,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:25,019 INFO L225 Difference]: With dead ends: 314 [2021-05-02 20:18:25,019 INFO L226 Difference]: Without dead ends: 314 [2021-05-02 20:18:25,019 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:18:25,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-02 20:18:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 283. [2021-05-02 20:18:25,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 189 states have internal predecessors, (201), 72 states have call successors, (72), 36 states have call predecessors, (72), 35 states have return successors, (68), 57 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-02 20:18:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 341 transitions. [2021-05-02 20:18:25,025 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 341 transitions. Word has length 80 [2021-05-02 20:18:25,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:25,025 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 341 transitions. [2021-05-02 20:18:25,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:18:25,025 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 341 transitions. [2021-05-02 20:18:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 20:18:25,026 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:25,026 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:25,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:25,241 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:25,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1072579442, now seen corresponding path program 3 times [2021-05-02 20:18:25,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:25,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743185752] [2021-05-02 20:18:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:25,249 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:25,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872788518] [2021-05-02 20:18:25,249 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:25,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:18:25,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:25,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 20:18:25,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:25,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 46 proven. 37 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-05-02 20:18:25,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:25,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743185752] [2021-05-02 20:18:25,567 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:25,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872788518] [2021-05-02 20:18:25,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872788518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:25,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:25,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:18:25,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405694980] [2021-05-02 20:18:25,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:18:25,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:25,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:18:25,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:18:25,571 INFO L87 Difference]: Start difference. First operand 283 states and 341 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:18:25,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:25,877 INFO L93 Difference]: Finished difference Result 316 states and 393 transitions. [2021-05-02 20:18:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:18:25,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-02 20:18:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:25,879 INFO L225 Difference]: With dead ends: 316 [2021-05-02 20:18:25,879 INFO L226 Difference]: Without dead ends: 316 [2021-05-02 20:18:25,879 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:18:25,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-02 20:18:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 294. [2021-05-02 20:18:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 182 states have (on average 1.1538461538461537) internal successors, (210), 196 states have internal predecessors, (210), 75 states have call successors, (75), 37 states have call predecessors, (75), 36 states have return successors, (71), 60 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 20:18:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 356 transitions. [2021-05-02 20:18:25,889 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 356 transitions. Word has length 85 [2021-05-02 20:18:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:25,889 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 356 transitions. [2021-05-02 20:18:25,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:18:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 356 transitions. [2021-05-02 20:18:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 20:18:25,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:25,890 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:26,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 20:18:26,108 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:26,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:26,108 INFO L82 PathProgramCache]: Analyzing trace with hash -721779505, now seen corresponding path program 10 times [2021-05-02 20:18:26,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:26,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067222192] [2021-05-02 20:18:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:26,120 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:26,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054611066] [2021-05-02 20:18:26,121 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:26,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:18:26,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:26,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 20:18:26,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:26,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,651 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 20:18:28,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 60 proven. 44 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-05-02 20:18:29,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:29,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067222192] [2021-05-02 20:18:29,033 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:29,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054611066] [2021-05-02 20:18:29,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054611066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:29,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:29,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:18:29,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710444441] [2021-05-02 20:18:29,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:18:29,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:29,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:18:29,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:18:29,035 INFO L87 Difference]: Start difference. First operand 294 states and 356 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 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 20:18:38,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:38,614 INFO L93 Difference]: Finished difference Result 337 states and 416 transitions. [2021-05-02 20:18:38,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:18:38,615 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 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 85 [2021-05-02 20:18:38,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:38,616 INFO L225 Difference]: With dead ends: 337 [2021-05-02 20:18:38,616 INFO L226 Difference]: Without dead ends: 337 [2021-05-02 20:18:38,616 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2392.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:18:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-02 20:18:38,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 313. [2021-05-02 20:18:38,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 209 states have internal predecessors, (224), 78 states have call successors, (78), 40 states have call predecessors, (78), 39 states have return successors, (74), 63 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 20:18:38,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 376 transitions. [2021-05-02 20:18:38,622 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 376 transitions. Word has length 85 [2021-05-02 20:18:38,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:38,622 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 376 transitions. [2021-05-02 20:18:38,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 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 20:18:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 376 transitions. [2021-05-02 20:18:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 20:18:38,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:38,623 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:38,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 20:18:38,839 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:38,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:38,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1313119571, now seen corresponding path program 11 times [2021-05-02 20:18:38,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:38,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835659989] [2021-05-02 20:18:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:38,846 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:38,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845828829] [2021-05-02 20:18:38,846 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:39,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 20:18:39,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:39,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 20:18:39,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:39,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 22 proven. 58 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-02 20:18:39,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:39,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835659989] [2021-05-02 20:18:39,356 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:39,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845828829] [2021-05-02 20:18:39,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845828829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:39,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:39,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:18:39,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264612881] [2021-05-02 20:18:39,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:18:39,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:39,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:18:39,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:18:39,357 INFO L87 Difference]: Start difference. First operand 313 states and 376 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 20:18:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:39,665 INFO L93 Difference]: Finished difference Result 345 states and 426 transitions. [2021-05-02 20:18:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:18:39,665 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 85 [2021-05-02 20:18:39,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:39,666 INFO L225 Difference]: With dead ends: 345 [2021-05-02 20:18:39,667 INFO L226 Difference]: Without dead ends: 345 [2021-05-02 20:18:39,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:18:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-02 20:18:39,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 313. [2021-05-02 20:18:39,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 209 states have internal predecessors, (224), 78 states have call successors, (78), 40 states have call predecessors, (78), 39 states have return successors, (74), 63 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 20:18:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 376 transitions. [2021-05-02 20:18:39,674 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 376 transitions. Word has length 85 [2021-05-02 20:18:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:39,674 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 376 transitions. [2021-05-02 20:18:39,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 20:18:39,674 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 376 transitions. [2021-05-02 20:18:39,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 20:18:39,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:39,675 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:39,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 20:18:39,891 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:39,892 INFO L82 PathProgramCache]: Analyzing trace with hash -962319634, now seen corresponding path program 12 times [2021-05-02 20:18:39,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:39,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341763567] [2021-05-02 20:18:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:39,899 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:39,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47805956] [2021-05-02 20:18:39,900 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:40,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 20:18:40,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:40,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:18:40,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:40,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 46 proven. 38 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 20:18:40,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:40,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341763567] [2021-05-02 20:18:40,176 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:40,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47805956] [2021-05-02 20:18:40,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47805956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:40,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:40,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:18:40,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839485732] [2021-05-02 20:18:40,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:18:40,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:40,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:18:40,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:40,178 INFO L87 Difference]: Start difference. First operand 313 states and 376 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:18:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:42,323 INFO L93 Difference]: Finished difference Result 336 states and 408 transitions. [2021-05-02 20:18:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:18:42,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2021-05-02 20:18:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:42,324 INFO L225 Difference]: With dead ends: 336 [2021-05-02 20:18:42,324 INFO L226 Difference]: Without dead ends: 332 [2021-05-02 20:18:42,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-02 20:18:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 306. [2021-05-02 20:18:42,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 190 states have (on average 1.1210526315789473) internal successors, (213), 206 states have internal predecessors, (213), 75 states have call successors, (75), 41 states have call predecessors, (75), 40 states have return successors, (71), 58 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 20:18:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 359 transitions. [2021-05-02 20:18:42,330 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 359 transitions. Word has length 85 [2021-05-02 20:18:42,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:42,330 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 359 transitions. [2021-05-02 20:18:42,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:18:42,330 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 359 transitions. [2021-05-02 20:18:42,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 20:18:42,331 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:42,331 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:42,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:42,532 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:42,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:42,532 INFO L82 PathProgramCache]: Analyzing trace with hash -201025847, now seen corresponding path program 13 times [2021-05-02 20:18:42,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:42,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576816243] [2021-05-02 20:18:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:42,537 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:42,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861063029] [2021-05-02 20:18:42,537 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:42,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 20:18:42,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:42,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 24 proven. 67 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-05-02 20:18:42,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:42,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576816243] [2021-05-02 20:18:42,878 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:42,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861063029] [2021-05-02 20:18:42,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861063029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:42,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:42,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:18:42,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130054192] [2021-05-02 20:18:42,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:18:42,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:42,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:18:42,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:18:42,879 INFO L87 Difference]: Start difference. First operand 306 states and 359 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-02 20:18:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:43,203 INFO L93 Difference]: Finished difference Result 337 states and 411 transitions. [2021-05-02 20:18:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:18:43,204 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 90 [2021-05-02 20:18:43,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:43,205 INFO L225 Difference]: With dead ends: 337 [2021-05-02 20:18:43,205 INFO L226 Difference]: Without dead ends: 332 [2021-05-02 20:18:43,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:18:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-02 20:18:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 327. [2021-05-02 20:18:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 203 states have (on average 1.1330049261083743) internal successors, (230), 220 states have internal predecessors, (230), 82 states have call successors, (82), 42 states have call predecessors, (82), 41 states have return successors, (78), 64 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 20:18:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 390 transitions. [2021-05-02 20:18:43,211 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 390 transitions. Word has length 90 [2021-05-02 20:18:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:43,211 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 390 transitions. [2021-05-02 20:18:43,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-02 20:18:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 390 transitions. [2021-05-02 20:18:43,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 20:18:43,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:43,212 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:43,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-02 20:18:43,428 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:43,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1749274408, now seen corresponding path program 14 times [2021-05-02 20:18:43,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:43,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296902544] [2021-05-02 20:18:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:43,433 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:43,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341393814] [2021-05-02 20:18:43,433 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:43,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:43,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:43,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-02 20:18:43,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:43,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 63 proven. 82 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-05-02 20:18:43,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:43,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296902544] [2021-05-02 20:18:43,815 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:43,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341393814] [2021-05-02 20:18:43,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341393814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:43,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:43,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:18:43,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121522335] [2021-05-02 20:18:43,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:18:43,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:43,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:18:43,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:18:43,816 INFO L87 Difference]: Start difference. First operand 327 states and 390 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 20:18:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:44,140 INFO L93 Difference]: Finished difference Result 355 states and 438 transitions. [2021-05-02 20:18:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:18:44,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 90 [2021-05-02 20:18:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:44,142 INFO L225 Difference]: With dead ends: 355 [2021-05-02 20:18:44,142 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 20:18:44,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:18:44,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 20:18:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 327. [2021-05-02 20:18:44,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 203 states have (on average 1.1330049261083743) internal successors, (230), 220 states have internal predecessors, (230), 82 states have call successors, (82), 42 states have call predecessors, (82), 41 states have return successors, (78), 64 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 20:18:44,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 390 transitions. [2021-05-02 20:18:44,150 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 390 transitions. Word has length 90 [2021-05-02 20:18:44,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:44,150 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 390 transitions. [2021-05-02 20:18:44,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 20:18:44,150 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 390 transitions. [2021-05-02 20:18:44,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 20:18:44,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:44,151 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:44,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:44,367 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:44,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:44,367 INFO L82 PathProgramCache]: Analyzing trace with hash 492366858, now seen corresponding path program 15 times [2021-05-02 20:18:44,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:44,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071830027] [2021-05-02 20:18:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:44,373 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:44,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918572135] [2021-05-02 20:18:44,373 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:44,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:18:44,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:44,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 20:18:44,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:44,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,788 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-02 20:18:50,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:50,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 71 proven. 37 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-02 20:18:51,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:51,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071830027] [2021-05-02 20:18:51,160 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:51,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918572135] [2021-05-02 20:18:51,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918572135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:51,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:51,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:18:51,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089933272] [2021-05-02 20:18:51,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:18:51,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:51,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:18:51,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=177, Unknown=1, NotChecked=0, Total=210 [2021-05-02 20:18:51,161 INFO L87 Difference]: Start difference. First operand 327 states and 390 transitions. Second operand has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:19:11,953 WARN L205 SmtUtils]: Spent 9.43 s on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-05-02 20:19:20,565 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-05-02 20:19:36,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:36,056 INFO L93 Difference]: Finished difference Result 389 states and 500 transitions. [2021-05-02 20:19:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:19:36,056 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 90 [2021-05-02 20:19:36,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:36,056 INFO L225 Difference]: With dead ends: 389 [2021-05-02 20:19:36,057 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:19:36,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 26134.5ms TimeCoverageRelationStatistics Valid=114, Invalid=638, Unknown=4, NotChecked=0, Total=756 [2021-05-02 20:19:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:19:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:19:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:19:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:19:36,057 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2021-05-02 20:19:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:36,057 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:19:36,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:19:36,058 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:19:36,058 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:19:36,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-02 20:19:36,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:19:36 BasicIcfg [2021-05-02 20:19:36,262 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:19:36,262 INFO L168 Benchmark]: Toolchain (without parser) took 93945.41 ms. Allocated memory was 186.6 MB in the beginning and 395.3 MB in the end (delta: 208.7 MB). Free memory was 150.7 MB in the beginning and 301.2 MB in the end (delta: -150.6 MB). Peak memory consumption was 59.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:19:36,262 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 186.6 MB. Free memory is still 167.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:19:36,262 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.83 ms. Allocated memory is still 186.6 MB. Free memory was 150.4 MB in the beginning and 169.7 MB in the end (delta: -19.2 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:19:36,262 INFO L168 Benchmark]: Boogie Preprocessor took 67.60 ms. Allocated memory is still 186.6 MB. Free memory was 169.7 MB in the beginning and 168.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:19:36,264 INFO L168 Benchmark]: RCFGBuilder took 276.12 ms. Allocated memory is still 186.6 MB. Free memory was 168.2 MB in the beginning and 152.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:19:36,264 INFO L168 Benchmark]: IcfgTransformer took 13.02 ms. Allocated memory is still 186.6 MB. Free memory was 152.0 MB in the beginning and 150.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:19:36,264 INFO L168 Benchmark]: TraceAbstraction took 93357.70 ms. Allocated memory was 186.6 MB in the beginning and 395.3 MB in the end (delta: 208.7 MB). Free memory was 150.4 MB in the beginning and 301.2 MB in the end (delta: -150.8 MB). Peak memory consumption was 58.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:19:36,264 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 186.6 MB. Free memory is still 167.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 199.83 ms. Allocated memory is still 186.6 MB. Free memory was 150.4 MB in the beginning and 169.7 MB in the end (delta: -19.2 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 67.60 ms. Allocated memory is still 186.6 MB. Free memory was 169.7 MB in the beginning and 168.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 276.12 ms. Allocated memory is still 186.6 MB. Free memory was 168.2 MB in the beginning and 152.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.02 ms. Allocated memory is still 186.6 MB. Free memory was 152.0 MB in the beginning and 150.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 93357.70 ms. Allocated memory was 186.6 MB in the beginning and 395.3 MB in the end (delta: 208.7 MB). Free memory was 150.4 MB in the beginning and 301.2 MB in the end (delta: -150.8 MB). Peak memory consumption was 58.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 93324.1ms, OverallIterations: 31, TraceHistogramMax: 12, EmptinessCheckTime: 25.1ms, AutomataDifference: 69353.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1258 SDtfs, 757 SDslu, 6618 SDs, 0 SdLazy, 7098 SolverSat, 707 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 47169.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1996 GetRequests, 1634 SyntacticMatches, 12 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 30838.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=327occurred in iteration=29, InterpolantAutomatonStates: 317, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 186.7ms AutomataMinimizationTime, 31 MinimizatonAttempts, 312 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 260.5ms SsaConstructionTime, 1875.9ms SatisfiabilityAnalysisTime, 14219.7ms InterpolantComputationTime, 1942 NumberOfCodeBlocks, 1810 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 1911 ConstructedInterpolants, 2 QuantifiedInterpolants, 12270 SizeOfPredicates, 151 NumberOfNonLiveVariables, 6082 ConjunctsInSsa, 936 ConjunctsInUnsatCore, 31 InterpolantComputations, 5 PerfectInterpolantSequences, 3162/4000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...