/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/divbin_unwindbound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:09:07,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:09:07,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:09:07,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:09:07,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:09:07,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:09:07,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:09:07,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:09:07,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:09:07,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:09:07,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:09:07,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:09:07,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:09:07,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:09:07,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:09:07,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:09:07,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:09:07,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:09:07,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:09:07,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:09:07,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:09:07,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:09:07,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:09:07,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:09:07,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 20:09:07,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 20:09:07,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 20:09:07,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 20:09:07,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 20:09:07,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 20:09:07,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 20:09:07,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 20:09:07,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 20:09:07,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 20:09:07,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 20:09:07,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 20:09:07,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 20:09:07,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 20:09:07,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:09:07,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:09:07,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:09:07,195 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:09:07,201 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:09:07,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:09:07,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:09:07,202 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:09:07,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:09:07,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:09:07,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:09:07,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:09:07,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:09:07,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:09:07,203 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:09:07,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:09:07,204 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:09:07,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:09:07,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:09:07,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:09:07,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:09:07,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:09:07,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:09:07,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:09:07,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:09:07,205 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:09:07,205 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:09:07,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:09:07,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:09:07,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:09:07,467 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:09:07,467 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:09:07,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound10.i [2021-05-02 20:09:07,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8bb7e955/b2c76746dd0241c892176063435edde9/FLAGd15a5ee0e [2021-05-02 20:09:07,922 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:09:07,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound10.i [2021-05-02 20:09:07,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8bb7e955/b2c76746dd0241c892176063435edde9/FLAGd15a5ee0e [2021-05-02 20:09:07,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8bb7e955/b2c76746dd0241c892176063435edde9 [2021-05-02 20:09:07,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:09:07,944 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:09:07,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:09:07,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:09:07,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:09:07,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:09:07" (1/1) ... [2021-05-02 20:09:07,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fbf474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:09:07, skipping insertion in model container [2021-05-02 20:09:07,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:09:07" (1/1) ... [2021-05-02 20:09:07,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:09:07,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:09:08,053 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/divbin_unwindbound10.i[958,971] [2021-05-02 20:09:08,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:09:08,069 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:09:08,077 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/divbin_unwindbound10.i[958,971] [2021-05-02 20:09:08,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:09:08,149 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:09:08,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:09:08 WrapperNode [2021-05-02 20:09:08,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:09:08,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:09:08,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:09:08,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:09:08,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:09:08" (1/1) ... [2021-05-02 20:09:08,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:09:08" (1/1) ... [2021-05-02 20:09:08,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:09:08" (1/1) ... [2021-05-02 20:09:08,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:09:08" (1/1) ... [2021-05-02 20:09:08,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:09:08" (1/1) ... [2021-05-02 20:09:08,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:09:08" (1/1) ... [2021-05-02 20:09:08,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:09:08" (1/1) ... [2021-05-02 20:09:08,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:09:08,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:09:08,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:09:08,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:09:08,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:09:08" (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 20:09:08,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:09:08,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:09:08,251 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:09:08,251 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:09:08,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:09:08,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:09:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:09:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:09:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 20:09:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 20:09:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:09:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:09:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:09:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:09:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:09:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:09:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:09:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:09:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:09:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:09:08,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:09:08,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:09:08,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:09:08,487 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:09:08,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:09:08 BoogieIcfgContainer [2021-05-02 20:09:08,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:09:08,489 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:09:08,489 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:09:08,489 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:09:08,491 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:09:08" (1/1) ... [2021-05-02 20:09:08,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:09:08 BasicIcfg [2021-05-02 20:09:08,518 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:09:08,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:09:08,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:09:08,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:09:08,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:09:07" (1/4) ... [2021-05-02 20:09:08,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6280e75a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:09:08, skipping insertion in model container [2021-05-02 20:09:08,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:09:08" (2/4) ... [2021-05-02 20:09:08,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6280e75a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:09:08, skipping insertion in model container [2021-05-02 20:09:08,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:09:08" (3/4) ... [2021-05-02 20:09:08,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6280e75a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:09:08, skipping insertion in model container [2021-05-02 20:09:08,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:09:08" (4/4) ... [2021-05-02 20:09:08,523 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound10.iJordan [2021-05-02 20:09:08,527 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:09:08,530 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:09:08,540 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:09:08,561 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:09:08,562 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:09:08,562 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:09:08,562 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:09:08,562 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:09:08,562 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:09:08,562 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:09:08,562 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:09:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:09:08,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:09:08,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:08,578 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 20:09:08,579 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:08,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:08,582 INFO L82 PathProgramCache]: Analyzing trace with hash 35225450, now seen corresponding path program 1 times [2021-05-02 20:09:08,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:08,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421757365] [2021-05-02 20:09:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:08,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:09:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:08,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:09:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:08,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:09:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:08,794 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 20:09:08,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:08,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421757365] [2021-05-02 20:09:08,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421757365] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:09:08,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:09:08,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:09:08,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574555064] [2021-05-02 20:09:08,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:09:08,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:08,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:09:08,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:09:08,812 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:09:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:08,908 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-02 20:09:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:09:08,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:09:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:08,922 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:09:08,922 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 20:09:08,923 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:09:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 20:09:08,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-02 20:09:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:09:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-05-02 20:09:08,960 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2021-05-02 20:09:08,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:08,960 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-05-02 20:09:08,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:09:08,961 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-05-02 20:09:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 20:09:08,962 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:08,962 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, 1, 1] [2021-05-02 20:09:08,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:09:08,962 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:08,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:08,963 INFO L82 PathProgramCache]: Analyzing trace with hash 106385839, now seen corresponding path program 1 times [2021-05-02 20:09:08,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:08,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874484167] [2021-05-02 20:09:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:08,975 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:08,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114345156] [2021-05-02 20:09:08,976 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 20:09:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:09,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:09:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:09,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:09,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:09,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:09,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:09,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:09,203 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 20:09:09,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:09,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874484167] [2021-05-02 20:09:09,203 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:09,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114345156] [2021-05-02 20:09:09,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114345156] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:09:09,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:09:09,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:09:09,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461290824] [2021-05-02 20:09:09,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:09:09,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:09,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:09:09,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:09:09,205 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:09:09,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:09,217 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-05-02 20:09:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:09:09,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-05-02 20:09:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:09,218 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:09:09,218 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 20:09:09,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:09:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 20:09:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 20:09:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:09:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-05-02 20:09:09,222 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2021-05-02 20:09:09,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:09,223 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-05-02 20:09:09,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:09:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-05-02 20:09:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 20:09:09,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:09,224 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, 1, 1, 1] [2021-05-02 20:09:09,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:09:09,441 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:09,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:09,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1662084126, now seen corresponding path program 1 times [2021-05-02 20:09:09,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:09,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316394978] [2021-05-02 20:09:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:09,465 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:09,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500339056] [2021-05-02 20:09:09,465 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 20:09:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:09,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:09:09,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:09,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:09,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:09,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:09,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:09,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:09,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:09,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:09,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:09,658 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 20:09:09,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:09,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316394978] [2021-05-02 20:09:09,658 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:09,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500339056] [2021-05-02 20:09:09,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500339056] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:09:09,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:09:09,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:09:09,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340057967] [2021-05-02 20:09:09,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:09:09,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:09,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:09:09,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:09:09,660 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:09:09,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:09,700 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-05-02 20:09:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:09:09,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 20:09:09,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:09,701 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:09:09,702 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:09:09,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:09:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:09:09,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 20:09:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:09:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-05-02 20:09:09,716 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2021-05-02 20:09:09,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:09,716 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-05-02 20:09:09,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:09:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-05-02 20:09:09,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 20:09:09,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:09,717 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, 1, 1, 1] [2021-05-02 20:09:09,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:09:09,933 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:09,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1663216184, now seen corresponding path program 1 times [2021-05-02 20:09:09,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:09,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968908472] [2021-05-02 20:09:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:09,943 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:09,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104147293] [2021-05-02 20:09:09,943 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 20:09:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:09,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:09:09,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:10,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:10,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:10,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:10,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:10,121 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 20:09:10,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:10,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968908472] [2021-05-02 20:09:10,122 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:10,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104147293] [2021-05-02 20:09:10,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104147293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:09:10,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:09:10,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:09:10,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052138560] [2021-05-02 20:09:10,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:09:10,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:10,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:09:10,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:09:10,124 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:09:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:10,270 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-05-02 20:09:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:09:10,272 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 20:09:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:10,274 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:09:10,274 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:09:10,275 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:09:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:09:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 20:09:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:09:10,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-05-02 20:09:10,293 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 26 [2021-05-02 20:09:10,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:10,293 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-05-02 20:09:10,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:09:10,293 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-05-02 20:09:10,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:09:10,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:10,294 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 20:09:10,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:09:10,513 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:10,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1664227005, now seen corresponding path program 1 times [2021-05-02 20:09:10,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:10,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986053217] [2021-05-02 20:09:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:10,523 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:10,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212671079] [2021-05-02 20:09:10,523 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 20:09:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:10,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:09:10,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:10,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:10,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:10,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:10,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:10,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:10,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:10,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:10,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:09:10,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:10,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986053217] [2021-05-02 20:09:10,639 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:10,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212671079] [2021-05-02 20:09:10,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212671079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:09:10,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:09:10,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:09:10,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662342072] [2021-05-02 20:09:10,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:09:10,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:10,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:09:10,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:09:10,640 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:09:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:10,679 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-02 20:09:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:09:10,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 20:09:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:10,680 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:09:10,680 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 20:09:10,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:09:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 20:09:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-02 20:09:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:09:10,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 20:09:10,683 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 28 [2021-05-02 20:09:10,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:10,683 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 20:09:10,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:09:10,684 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 20:09:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:09:10,684 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:10,684 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:09:10,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:09:10,901 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:10,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1687306486, now seen corresponding path program 1 times [2021-05-02 20:09:10,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:10,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845038344] [2021-05-02 20:09:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:10,911 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:10,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102693859] [2021-05-02 20:09:10,911 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 20:09:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:11,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:09:11,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:11,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:09:11,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:11,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845038344] [2021-05-02 20:09:11,066 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:11,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102693859] [2021-05-02 20:09:11,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102693859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:09:11,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:09:11,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:09:11,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401628226] [2021-05-02 20:09:11,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:09:11,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:11,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:09:11,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:09:11,068 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:09:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:11,097 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 20:09:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:09:11,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:09:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:11,098 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:09:11,098 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 20:09:11,098 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:09:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 20:09:11,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-05-02 20:09:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:09:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-02 20:09:11,101 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 29 [2021-05-02 20:09:11,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:11,101 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-02 20:09:11,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:09:11,101 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-02 20:09:11,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:09:11,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:11,102 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:09:11,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:09:11,318 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:11,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1686174428, now seen corresponding path program 1 times [2021-05-02 20:09:11,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:11,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996725777] [2021-05-02 20:09:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:11,327 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:11,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078699545] [2021-05-02 20:09:11,328 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 20:09:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:11,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:09:11,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:11,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:09:11,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:11,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996725777] [2021-05-02 20:09:11,572 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:11,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078699545] [2021-05-02 20:09:11,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078699545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:09:11,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:09:11,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:09:11,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741858613] [2021-05-02 20:09:11,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:09:11,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:11,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:09:11,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:09:11,573 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:09:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:11,713 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2021-05-02 20:09:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:09:11,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:09:11,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:11,715 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:09:11,715 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 20:09:11,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:09:11,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 20:09:11,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-05-02 20:09:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 states have internal predecessors, (48), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:09:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-05-02 20:09:11,718 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 29 [2021-05-02 20:09:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:11,718 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-05-02 20:09:11,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:09:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-05-02 20:09:11,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 20:09:11,719 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:11,719 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:09:11,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:09:11,934 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:11,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:11,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1552566600, now seen corresponding path program 1 times [2021-05-02 20:09:11,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:11,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258937008] [2021-05-02 20:09:11,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:11,942 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:11,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557377171] [2021-05-02 20:09:11,942 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 20:09:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:11,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 20:09:11,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:09:12,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:12,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258937008] [2021-05-02 20:09:12,022 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:12,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557377171] [2021-05-02 20:09:12,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557377171] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:09:12,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:09:12,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:09:12,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106066164] [2021-05-02 20:09:12,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:09:12,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:12,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:09:12,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:09:12,023 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:09:12,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:12,032 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-05-02 20:09:12,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:09:12,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-05-02 20:09:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:12,033 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:09:12,033 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:09:12,033 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:09:12,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:09:12,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 20:09:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:09:12,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-05-02 20:09:12,035 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 35 [2021-05-02 20:09:12,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:12,035 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-05-02 20:09:12,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:09:12,036 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-05-02 20:09:12,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:09:12,036 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:12,036 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:09:12,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:09:12,256 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:12,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:12,257 INFO L82 PathProgramCache]: Analyzing trace with hash 402759474, now seen corresponding path program 1 times [2021-05-02 20:09:12,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:12,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477491954] [2021-05-02 20:09:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:12,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:12,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314322746] [2021-05-02 20:09:12,265 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 20:09:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:12,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:09:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:12,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:09:12,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:12,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477491954] [2021-05-02 20:09:12,384 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:12,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314322746] [2021-05-02 20:09:12,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314322746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:09:12,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:09:12,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:09:12,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962244610] [2021-05-02 20:09:12,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:09:12,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:12,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:09:12,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:09:12,385 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:09:12,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:12,413 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-05-02 20:09:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:09:12,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-05-02 20:09:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:12,414 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:09:12,414 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:09:12,414 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:09:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:09:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-05-02 20:09:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:09:12,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-05-02 20:09:12,417 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 38 [2021-05-02 20:09:12,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:12,417 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-05-02 20:09:12,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:09:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-05-02 20:09:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:09:12,417 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:12,418 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-02 20:09:12,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:09:12,632 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:12,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:12,632 INFO L82 PathProgramCache]: Analyzing trace with hash 403891532, now seen corresponding path program 1 times [2021-05-02 20:09:12,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:12,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805985235] [2021-05-02 20:09:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:12,640 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:12,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958909109] [2021-05-02 20:09:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:09:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:12,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:09:12,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:12,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:12,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:13,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:13,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:09:13,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:13,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805985235] [2021-05-02 20:09:13,527 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:13,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958909109] [2021-05-02 20:09:13,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958909109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:09:13,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:09:13,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:09:13,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202647586] [2021-05-02 20:09:13,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:09:13,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:13,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:09:13,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:09:13,528 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 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 20:09:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:13,996 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2021-05-02 20:09:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:09:13,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 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 38 [2021-05-02 20:09:13,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:13,997 INFO L225 Difference]: With dead ends: 77 [2021-05-02 20:09:13,997 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 20:09:13,998 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 413.8ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:09:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 20:09:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2021-05-02 20:09:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 48 states have internal predecessors, (55), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:09:14,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-05-02 20:09:14,001 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 38 [2021-05-02 20:09:14,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:14,001 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-05-02 20:09:14,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 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 20:09:14,001 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-05-02 20:09:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 20:09:14,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:14,002 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:09:14,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:09:14,205 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:14,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:14,206 INFO L82 PathProgramCache]: Analyzing trace with hash -711541075, now seen corresponding path program 1 times [2021-05-02 20:09:14,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:14,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969504485] [2021-05-02 20:09:14,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:14,214 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:14,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018202563] [2021-05-02 20:09:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:09:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:14,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:09:14,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:14,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:09:14,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:14,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969504485] [2021-05-02 20:09:14,313 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:14,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018202563] [2021-05-02 20:09:14,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018202563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:09:14,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:09:14,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:09:14,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428617026] [2021-05-02 20:09:14,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:09:14,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:14,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:09:14,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:09:14,314 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:09:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:14,341 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2021-05-02 20:09:14,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:09:14,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2021-05-02 20:09:14,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:14,342 INFO L225 Difference]: With dead ends: 65 [2021-05-02 20:09:14,342 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 20:09:14,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:09:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 20:09:14,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 20:09:14,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:09:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-05-02 20:09:14,345 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 40 [2021-05-02 20:09:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:14,345 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-05-02 20:09:14,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:09:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-05-02 20:09:14,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:09:14,346 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:14,346 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:09:14,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:09:14,562 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:14,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:14,562 INFO L82 PathProgramCache]: Analyzing trace with hash 915639449, now seen corresponding path program 2 times [2021-05-02 20:09:14,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:14,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242957803] [2021-05-02 20:09:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:14,570 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:14,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109141577] [2021-05-02 20:09:14,570 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 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 20:09:14,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:09:14,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:09:14,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:09:14,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:14,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:09:14,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:14,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242957803] [2021-05-02 20:09:14,676 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:14,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109141577] [2021-05-02 20:09:14,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109141577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:09:14,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:09:14,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:09:14,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705492766] [2021-05-02 20:09:14,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:09:14,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:14,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:09:14,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:09:14,677 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:09:14,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:14,714 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2021-05-02 20:09:14,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:09:14,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2021-05-02 20:09:14,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:14,715 INFO L225 Difference]: With dead ends: 72 [2021-05-02 20:09:14,715 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 20:09:14,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:09:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 20:09:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2021-05-02 20:09:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:09:14,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-02 20:09:14,717 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 43 [2021-05-02 20:09:14,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:14,717 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-02 20:09:14,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:09:14,718 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-02 20:09:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:09:14,718 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:14,718 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2021-05-02 20:09:14,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:09:14,937 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:14,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:14,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1272338613, now seen corresponding path program 1 times [2021-05-02 20:09:14,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:14,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257788350] [2021-05-02 20:09:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:14,943 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:14,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488816066] [2021-05-02 20:09:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:09:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:14,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:09:14,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:14,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:14,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:09:15,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:15,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257788350] [2021-05-02 20:09:15,085 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:15,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488816066] [2021-05-02 20:09:15,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488816066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:09:15,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:09:15,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:09:15,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341186746] [2021-05-02 20:09:15,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:09:15,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:15,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:09:15,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:09:15,086 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:09:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:15,126 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2021-05-02 20:09:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:09:15,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2021-05-02 20:09:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:15,127 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:09:15,127 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 20:09:15,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:09:15,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 20:09:15,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2021-05-02 20:09:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 69 states have internal predecessors, (79), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:09:15,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2021-05-02 20:09:15,130 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 47 [2021-05-02 20:09:15,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:15,130 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2021-05-02 20:09:15,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:09:15,130 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2021-05-02 20:09:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:09:15,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:15,131 INFO L523 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2021-05-02 20:09:15,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:09:15,346 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:15,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:15,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1271206555, now seen corresponding path program 1 times [2021-05-02 20:09:15,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:15,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842565450] [2021-05-02 20:09:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:15,352 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:15,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582311426] [2021-05-02 20:09:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:09:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:09:15,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:09:15,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:15,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,824 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2021-05-02 20:09:15,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:15,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:16,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:09:16,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:16,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842565450] [2021-05-02 20:09:16,168 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:16,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582311426] [2021-05-02 20:09:16,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582311426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:09:16,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:09:16,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:09:16,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602864048] [2021-05-02 20:09:16,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:09:16,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:16,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:09:16,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:09:16,169 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:09:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:16,366 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-05-02 20:09:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:09:16,366 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2021-05-02 20:09:16,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:16,367 INFO L225 Difference]: With dead ends: 85 [2021-05-02 20:09:16,367 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:09:16,367 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:09:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:09:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 20:09:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:09:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 20:09:16,369 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 47 [2021-05-02 20:09:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:16,369 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 20:09:16,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:09:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 20:09:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:09:16,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:16,370 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:09:16,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:09:16,573 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:16,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:16,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1045240019, now seen corresponding path program 3 times [2021-05-02 20:09:16,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:16,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154120398] [2021-05-02 20:09:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:16,580 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:16,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168479124] [2021-05-02 20:09:16,580 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 20:09:16,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:09:16,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:09:16,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:09:16,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:16,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:16,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:16,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:16,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:09:16,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:16,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154120398] [2021-05-02 20:09:16,676 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:16,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168479124] [2021-05-02 20:09:16,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168479124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:09:16,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:09:16,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:09:16,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115708809] [2021-05-02 20:09:16,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:09:16,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:16,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:09:16,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:09:16,677 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:09:16,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:16,692 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-05-02 20:09:16,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:09:16,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-05-02 20:09:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:16,693 INFO L225 Difference]: With dead ends: 65 [2021-05-02 20:09:16,693 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 20:09:16,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:09:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 20:09:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2021-05-02 20:09:16,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.162162162162162) internal successors, (43), 38 states have internal predecessors, (43), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:09:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-05-02 20:09:16,698 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 46 [2021-05-02 20:09:16,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:16,698 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-05-02 20:09:16,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:09:16,698 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-05-02 20:09:16,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:09:16,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:16,699 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1] [2021-05-02 20:09:16,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:09:16,914 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:16,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1808689185, now seen corresponding path program 2 times [2021-05-02 20:09:16,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:16,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960161910] [2021-05-02 20:09:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:16,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:16,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542074843] [2021-05-02 20:09:16,931 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 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 20:09:16,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:09:16,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:09:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:09:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:16,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:16,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:16,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:09:17,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:09:17,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960161910] [2021-05-02 20:09:17,095 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:09:17,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542074843] [2021-05-02 20:09:17,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542074843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:09:17,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:09:17,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:09:17,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957686717] [2021-05-02 20:09:17,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:09:17,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:09:17,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:09:17,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:09:17,096 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:09:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:09:17,144 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2021-05-02 20:09:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:09:17,145 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-05-02 20:09:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:09:17,146 INFO L225 Difference]: With dead ends: 94 [2021-05-02 20:09:17,146 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 20:09:17,147 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:09:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 20:09:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-05-02 20:09:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 57 states have internal predecessors, (65), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:09:17,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-05-02 20:09:17,150 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 50 [2021-05-02 20:09:17,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:09:17,150 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-05-02 20:09:17,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:09:17,150 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-05-02 20:09:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:09:17,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:09:17,150 INFO L523 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1] [2021-05-02 20:09:17,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:09:17,366 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:09:17,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:09:17,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1807557127, now seen corresponding path program 2 times [2021-05-02 20:09:17,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:09:17,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151151117] [2021-05-02 20:09:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:09:17,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:09:17,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812124942] [2021-05-02 20:09:17,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:09:18,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:09:18,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:09:18,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:09:18,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:09:18,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:18,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:18,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:18,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:19,075 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-02 20:09:19,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:19,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:19,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:20,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:20,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:20,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:09:20,972 WARN L159 QuantifierPusher]: Ignoring assumption.