/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/egcd3-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:21:43,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:21:43,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:21:43,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:21:43,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:21:43,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:21:43,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:21:43,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:21:43,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:21:43,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:21:43,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:21:43,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:21:43,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:21:43,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:21:43,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:21:43,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:21:43,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:21:43,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:21:43,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:21:43,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:21:43,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:21:43,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:21:43,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:21:43,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:21:43,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 08:21:43,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 08:21:43,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 08:21:43,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 08:21:43,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 08:21:43,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 08:21:43,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 08:21:43,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 08:21:43,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 08:21:43,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 08:21:43,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 08:21:43,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 08:21:43,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 08:21:43,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 08:21:43,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:21:43,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:21:43,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:21:43,350 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:21:43,367 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:21:43,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:21:43,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:21:43,370 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:21:43,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:21:43,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:21:43,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:21:43,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:21:43,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:21:43,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:21:43,372 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:21:43,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:21:43,372 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:21:43,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:21:43,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:21:43,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:21:43,373 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:21:43,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:21:43,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:21:43,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:21:43,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:21:43,374 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:21:43,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:21:43,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:21:43,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:21:43,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:21:43,723 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:21:43,724 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:21:43,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2021-05-06 08:21:43,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5850ab2cf/c6355bd354434b5fb1d9ae289fa34c9d/FLAGe06e7ce79 [2021-05-06 08:21:44,235 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:21:44,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2021-05-06 08:21:44,242 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5850ab2cf/c6355bd354434b5fb1d9ae289fa34c9d/FLAGe06e7ce79 [2021-05-06 08:21:44,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5850ab2cf/c6355bd354434b5fb1d9ae289fa34c9d [2021-05-06 08:21:44,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:21:44,269 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:21:44,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:21:44,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:21:44,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:21:44,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:21:44" (1/1) ... [2021-05-06 08:21:44,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ad7876b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:44, skipping insertion in model container [2021-05-06 08:21:44,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:21:44" (1/1) ... [2021-05-06 08:21:44,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:21:44,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:21:44,414 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/egcd3-ll_unwindbound5.c[490,503] [2021-05-06 08:21:44,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:21:44,437 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:21:44,447 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/egcd3-ll_unwindbound5.c[490,503] [2021-05-06 08:21:44,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:21:44,467 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:21:44,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:44 WrapperNode [2021-05-06 08:21:44,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:21:44,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:21:44,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:21:44,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:21:44,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:44" (1/1) ... [2021-05-06 08:21:44,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:44" (1/1) ... [2021-05-06 08:21:44,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:44" (1/1) ... [2021-05-06 08:21:44,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:44" (1/1) ... [2021-05-06 08:21:44,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:44" (1/1) ... [2021-05-06 08:21:44,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:44" (1/1) ... [2021-05-06 08:21:44,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:44" (1/1) ... [2021-05-06 08:21:44,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:21:44,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:21:44,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:21:44,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:21:44,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:44" (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 [2021-05-06 08:21:44,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:21:44,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:21:44,617 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:21:44,617 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:21:44,617 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:21:44,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:21:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:21:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:21:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:21:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:21:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:21:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:21:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:21:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:21:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:21:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:21:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:21:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:21:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:21:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:21:44,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:21:44,970 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:21:44,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:21:44 BoogieIcfgContainer [2021-05-06 08:21:44,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:21:44,971 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:21:44,972 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:21:44,972 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:21:44,974 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:21:44" (1/1) ... [2021-05-06 08:21:44,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:21:44 BasicIcfg [2021-05-06 08:21:44,987 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:21:44,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:21:44,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:21:44,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:21:44,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:21:44" (1/4) ... [2021-05-06 08:21:44,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419f9c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:21:44, skipping insertion in model container [2021-05-06 08:21:44,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:44" (2/4) ... [2021-05-06 08:21:44,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419f9c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:21:44, skipping insertion in model container [2021-05-06 08:21:44,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:21:44" (3/4) ... [2021-05-06 08:21:44,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419f9c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:21:44, skipping insertion in model container [2021-05-06 08:21:44,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:21:44" (4/4) ... [2021-05-06 08:21:44,993 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.cJordan [2021-05-06 08:21:44,997 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:21:45,001 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:21:45,015 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:21:45,031 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:21:45,031 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:21:45,031 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:21:45,031 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:21:45,031 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:21:45,031 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:21:45,031 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:21:45,032 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:21:45,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:21:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:21:45,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:45,048 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:45,048 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:45,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:45,052 INFO L82 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2021-05-06 08:21:45,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:45,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275441590] [2021-05-06 08:21:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:45,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:21:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:45,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:21:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:45,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:21:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:45,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:45,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275441590] [2021-05-06 08:21:45,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275441590] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:45,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:45,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:21:45,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617865031] [2021-05-06 08:21:45,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:21:45,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:45,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:21:45,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:21:45,303 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:45,433 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-05-06 08:21:45,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:21:45,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 08:21:45,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:45,441 INFO L225 Difference]: With dead ends: 41 [2021-05-06 08:21:45,441 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 08:21:45,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:21:45,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 08:21:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-06 08:21:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:21:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-06 08:21:45,479 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-06 08:21:45,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:45,480 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-06 08:21:45,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-06 08:21:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:21:45,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:45,483 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] [2021-05-06 08:21:45,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:21:45,483 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:45,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:45,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2021-05-06 08:21:45,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:45,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070553806] [2021-05-06 08:21:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:45,510 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:45,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668258162] [2021-05-06 08:21:45,510 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 [2021-05-06 08:21:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:45,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:21:45,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:45,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:45,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:45,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070553806] [2021-05-06 08:21:45,709 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:45,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668258162] [2021-05-06 08:21:45,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668258162] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:45,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:45,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:21:45,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735390574] [2021-05-06 08:21:45,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:21:45,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:45,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:21:45,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:21:45,712 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-05-06 08:21:45,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:45,726 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-06 08:21:45,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:21:45,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 23 [2021-05-06 08:21:45,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:45,727 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:21:45,727 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 08:21:45,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:21:45,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 08:21:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 08:21:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:21:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-06 08:21:45,733 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-06 08:21:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:45,734 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-06 08:21:45,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-05-06 08:21:45,735 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-06 08:21:45,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 08:21:45,735 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:45,735 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] [2021-05-06 08:21:45,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:21:45,955 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2021-05-06 08:21:45,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:45,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44817193] [2021-05-06 08:21:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:45,979 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:45,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852532853] [2021-05-06 08:21:45,979 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 [2021-05-06 08:21:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:46,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:21:46,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:46,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:21:46,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:46,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44817193] [2021-05-06 08:21:46,200 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:46,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852532853] [2021-05-06 08:21:46,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852532853] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:46,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:46,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:21:46,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842458343] [2021-05-06 08:21:46,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:21:46,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:46,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:21:46,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:21:46,202 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:21:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:46,298 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-05-06 08:21:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:21:46,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-06 08:21:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:46,300 INFO L225 Difference]: With dead ends: 50 [2021-05-06 08:21:46,300 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 08:21:46,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:46,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 08:21:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-06 08:21:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:21:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-06 08:21:46,307 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-06 08:21:46,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:46,307 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-06 08:21:46,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:21:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-06 08:21:46,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:21:46,308 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:46,309 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, 1] [2021-05-06 08:21:46,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:46,533 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:46,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:46,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2021-05-06 08:21:46,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:46,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685177282] [2021-05-06 08:21:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:46,554 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:46,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79464274] [2021-05-06 08:21:46,554 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 [2021-05-06 08:21:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:46,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:21:46,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:46,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:46,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:46,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685177282] [2021-05-06 08:21:46,741 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:46,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79464274] [2021-05-06 08:21:46,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79464274] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:46,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:46,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:21:46,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155326583] [2021-05-06 08:21:46,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:21:46,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:46,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:21:46,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:21:46,743 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2021-05-06 08:21:46,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:46,772 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-06 08:21:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:21:46,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 [2021-05-06 08:21:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:46,773 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:21:46,773 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 08:21:46,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:21:46,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 08:21:46,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-06 08:21:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:21:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-06 08:21:46,778 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-06 08:21:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:46,779 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-06 08:21:46,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2021-05-06 08:21:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-06 08:21:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:21:46,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:46,780 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, 1, 1, 1] [2021-05-06 08:21:46,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:46,997 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:46,997 INFO L82 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2021-05-06 08:21:46,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:46,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774785590] [2021-05-06 08:21:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:47,019 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:47,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665213338] [2021-05-06 08:21:47,020 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 [2021-05-06 08:21:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:47,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:21:47,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:47,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:21:47,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:47,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774785590] [2021-05-06 08:21:47,238 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:47,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665213338] [2021-05-06 08:21:47,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665213338] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:47,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:47,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:21:47,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176042499] [2021-05-06 08:21:47,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:47,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:47,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:47,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:47,244 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:21:47,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:47,326 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2021-05-06 08:21:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:21:47,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-05-06 08:21:47,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:47,331 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:21:47,331 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:21:47,332 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:47,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:21:47,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 08:21:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:21:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-05-06 08:21:47,337 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2021-05-06 08:21:47,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:47,338 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-05-06 08:21:47,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:21:47,338 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-05-06 08:21:47,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 08:21:47,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:47,339 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, 1, 1] [2021-05-06 08:21:47,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:47,553 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:47,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:47,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2021-05-06 08:21:47,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:47,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22660683] [2021-05-06 08:21:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:47,567 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:47,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680920350] [2021-05-06 08:21:47,567 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 [2021-05-06 08:21:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:47,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:21:47,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:47,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:47,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:47,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22660683] [2021-05-06 08:21:47,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:47,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680920350] [2021-05-06 08:21:47,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680920350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:47,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:47,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:21:47,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782327230] [2021-05-06 08:21:47,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:21:47,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:47,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:21:47,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:21:47,734 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-05-06 08:21:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:47,776 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-05-06 08:21:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:21:47,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 30 [2021-05-06 08:21:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:47,778 INFO L225 Difference]: With dead ends: 60 [2021-05-06 08:21:47,778 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 08:21:47,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:21:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 08:21:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 08:21:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:21:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-05-06 08:21:47,785 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2021-05-06 08:21:47,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:47,785 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-05-06 08:21:47,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-05-06 08:21:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-05-06 08:21:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 08:21:47,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:47,786 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, 1, 1] [2021-05-06 08:21:47,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:21:47,989 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:47,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:47,989 INFO L82 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2021-05-06 08:21:47,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:47,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663081968] [2021-05-06 08:21:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:48,001 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:48,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156911800] [2021-05-06 08:21:48,002 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 [2021-05-06 08:21:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:48,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:21:48,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:48,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:21:48,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:48,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663081968] [2021-05-06 08:21:48,162 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:48,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156911800] [2021-05-06 08:21:48,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156911800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:48,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:48,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:21:48,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367054843] [2021-05-06 08:21:48,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:48,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:48,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:48,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:48,164 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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) [2021-05-06 08:21:48,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:48,406 INFO L93 Difference]: Finished difference Result 131 states and 193 transitions. [2021-05-06 08:21:48,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:21:48,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 31 [2021-05-06 08:21:48,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:48,408 INFO L225 Difference]: With dead ends: 131 [2021-05-06 08:21:48,408 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 08:21:48,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:21:48,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 08:21:48,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-05-06 08:21:48,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:21:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-05-06 08:21:48,418 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2021-05-06 08:21:48,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:48,418 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-05-06 08:21:48,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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) [2021-05-06 08:21:48,418 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-05-06 08:21:48,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:21:48,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:48,419 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, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:48,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:48,641 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:48,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:48,642 INFO L82 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2021-05-06 08:21:48,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:48,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124678855] [2021-05-06 08:21:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:48,656 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:48,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095254057] [2021-05-06 08:21:48,656 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 [2021-05-06 08:21:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:48,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:21:48,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:48,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:21:48,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:48,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124678855] [2021-05-06 08:21:48,826 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:48,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095254057] [2021-05-06 08:21:48,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095254057] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:48,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:48,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:21:48,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493465379] [2021-05-06 08:21:48,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:48,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:48,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:48,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:48,828 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:21:48,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:48,913 INFO L93 Difference]: Finished difference Result 93 states and 126 transitions. [2021-05-06 08:21:48,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:21:48,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-05-06 08:21:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:48,916 INFO L225 Difference]: With dead ends: 93 [2021-05-06 08:21:48,916 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 08:21:48,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:48,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 08:21:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 08:21:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 70 states have internal predecessors, (93), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:21:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-05-06 08:21:48,922 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 34 [2021-05-06 08:21:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:48,923 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-05-06 08:21:48,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:21:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-05-06 08:21:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 08:21:48,924 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:48,924 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, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:49,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:49,129 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:49,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:49,130 INFO L82 PathProgramCache]: Analyzing trace with hash 541001134, now seen corresponding path program 1 times [2021-05-06 08:21:49,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:49,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060521789] [2021-05-06 08:21:49,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:49,141 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:49,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984543762] [2021-05-06 08:21:49,142 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 [2021-05-06 08:21:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:49,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:21:49,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:49,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:49,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:49,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060521789] [2021-05-06 08:21:49,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:49,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984543762] [2021-05-06 08:21:49,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984543762] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:49,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:49,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:21:49,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144975980] [2021-05-06 08:21:49,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:21:49,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:49,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:21:49,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:21:49,313 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2021-05-06 08:21:49,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:49,340 INFO L93 Difference]: Finished difference Result 94 states and 127 transitions. [2021-05-06 08:21:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:21:49,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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 35 [2021-05-06 08:21:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:49,341 INFO L225 Difference]: With dead ends: 94 [2021-05-06 08:21:49,342 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 08:21:49,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:21:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 08:21:49,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-06 08:21:49,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 72 states have internal predecessors, (95), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:21:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2021-05-06 08:21:49,348 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 35 [2021-05-06 08:21:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:49,348 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2021-05-06 08:21:49,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2021-05-06 08:21:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2021-05-06 08:21:49,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:21:49,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:49,350 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] [2021-05-06 08:21:49,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:21:49,565 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:49,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1873858129, now seen corresponding path program 1 times [2021-05-06 08:21:49,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:49,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48856743] [2021-05-06 08:21:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:49,575 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:49,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052241408] [2021-05-06 08:21:49,576 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 [2021-05-06 08:21:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:49,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:21:49,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:49,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:49,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:49,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48856743] [2021-05-06 08:21:49,776 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:49,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052241408] [2021-05-06 08:21:49,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052241408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:49,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:49,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:21:49,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250909915] [2021-05-06 08:21:49,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:21:49,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:49,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:21:49,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:21:49,778 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-05-06 08:21:49,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:49,830 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2021-05-06 08:21:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:21:49,830 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), 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 36 [2021-05-06 08:21:49,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:49,833 INFO L225 Difference]: With dead ends: 120 [2021-05-06 08:21:49,833 INFO L226 Difference]: Without dead ends: 120 [2021-05-06 08:21:49,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:49,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-06 08:21:49,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-05-06 08:21:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:21:49,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-05-06 08:21:49,849 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 36 [2021-05-06 08:21:49,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:49,850 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-05-06 08:21:49,850 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), 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) [2021-05-06 08:21:49,850 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-05-06 08:21:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:21:49,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:49,853 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 08:21:50,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:50,053 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:50,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:50,054 INFO L82 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2021-05-06 08:21:50,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:50,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880058760] [2021-05-06 08:21:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:50,075 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:50,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746120553] [2021-05-06 08:21:50,075 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 [2021-05-06 08:21:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:50,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:21:50,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:50,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:21:50,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:50,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880058760] [2021-05-06 08:21:50,278 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:50,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746120553] [2021-05-06 08:21:50,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746120553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:50,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:50,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:21:50,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375908226] [2021-05-06 08:21:50,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:21:50,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:50,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:21:50,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:21:50,279 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 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) [2021-05-06 08:21:50,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:50,420 INFO L93 Difference]: Finished difference Result 152 states and 206 transitions. [2021-05-06 08:21:50,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:21:50,420 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 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 36 [2021-05-06 08:21:50,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:50,422 INFO L225 Difference]: With dead ends: 152 [2021-05-06 08:21:50,422 INFO L226 Difference]: Without dead ends: 152 [2021-05-06 08:21:50,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:21:50,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-06 08:21:50,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-05-06 08:21:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-06 08:21:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-05-06 08:21:50,429 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2021-05-06 08:21:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:50,429 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-05-06 08:21:50,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 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) [2021-05-06 08:21:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-05-06 08:21:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:21:50,430 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:50,430 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 08:21:50,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:50,648 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:50,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:50,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1011444142, now seen corresponding path program 2 times [2021-05-06 08:21:50,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:50,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169631507] [2021-05-06 08:21:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:50,657 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:50,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303072024] [2021-05-06 08:21:50,657 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 [2021-05-06 08:21:50,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:50,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:50,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:21:50,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:50,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:50,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:50,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169631507] [2021-05-06 08:21:50,843 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:50,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303072024] [2021-05-06 08:21:50,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303072024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:50,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:50,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:21:50,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929759151] [2021-05-06 08:21:50,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:50,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:50,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:50,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:50,845 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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) [2021-05-06 08:21:50,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:50,926 INFO L93 Difference]: Finished difference Result 182 states and 239 transitions. [2021-05-06 08:21:50,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:21:50,927 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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 37 [2021-05-06 08:21:50,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:50,928 INFO L225 Difference]: With dead ends: 182 [2021-05-06 08:21:50,928 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 08:21:50,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 08:21:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-05-06 08:21:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.31496062992126) internal successors, (167), 129 states have internal predecessors, (167), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:21:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2021-05-06 08:21:50,935 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 37 [2021-05-06 08:21:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:50,935 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2021-05-06 08:21:50,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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) [2021-05-06 08:21:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2021-05-06 08:21:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:21:50,936 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:50,936 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:51,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:21:51,161 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:51,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:51,161 INFO L82 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2021-05-06 08:21:51,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:51,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958502819] [2021-05-06 08:21:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:51,170 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:51,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999055019] [2021-05-06 08:21:51,171 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 [2021-05-06 08:21:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:51,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:21:51,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:51,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 08:21:51,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:51,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958502819] [2021-05-06 08:21:51,354 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:51,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999055019] [2021-05-06 08:21:51,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999055019] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:51,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:51,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 08:21:51,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005278763] [2021-05-06 08:21:51,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:21:51,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:51,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:21:51,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:21:51,357 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:21:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:51,479 INFO L93 Difference]: Finished difference Result 193 states and 254 transitions. [2021-05-06 08:21:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:21:51,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 08:21:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:51,484 INFO L225 Difference]: With dead ends: 193 [2021-05-06 08:21:51,485 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 08:21:51,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 08:21:51,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 08:21:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 141 states have internal predecessors, (181), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:21:51,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-05-06 08:21:51,494 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 39 [2021-05-06 08:21:51,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:51,494 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-05-06 08:21:51,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:21:51,494 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-05-06 08:21:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:21:51,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:51,495 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, 1, 1, 1] [2021-05-06 08:21:51,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:21:51,701 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:51,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:51,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2021-05-06 08:21:51,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:51,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701908596] [2021-05-06 08:21:51,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:51,711 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:51,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821350941] [2021-05-06 08:21:51,712 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 [2021-05-06 08:21:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:51,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:21:51,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:51,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:51,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:51,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701908596] [2021-05-06 08:21:51,929 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:51,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821350941] [2021-05-06 08:21:51,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821350941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:51,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:51,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:21:51,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963727833] [2021-05-06 08:21:51,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:21:51,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:51,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:21:51,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:51,930 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:21:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:52,177 INFO L93 Difference]: Finished difference Result 202 states and 261 transitions. [2021-05-06 08:21:52,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:21:52,178 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-05-06 08:21:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:52,180 INFO L225 Difference]: With dead ends: 202 [2021-05-06 08:21:52,180 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 08:21:52,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 08:21:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-05-06 08:21:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 145 states have (on average 1.289655172413793) internal successors, (187), 147 states have internal predecessors, (187), 37 states have call successors, (37), 18 states have call predecessors, (37), 17 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:21:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 259 transitions. [2021-05-06 08:21:52,188 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 259 transitions. Word has length 41 [2021-05-06 08:21:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:52,188 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 259 transitions. [2021-05-06 08:21:52,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:21:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 259 transitions. [2021-05-06 08:21:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:21:52,189 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:52,189 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:52,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:21:52,405 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:52,405 INFO L82 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2021-05-06 08:21:52,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:52,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857416262] [2021-05-06 08:21:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:52,413 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:52,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724953183] [2021-05-06 08:21:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:21:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:52,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:21:52,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:52,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:21:52,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:52,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857416262] [2021-05-06 08:21:52,549 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:52,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724953183] [2021-05-06 08:21:52,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724953183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:52,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:52,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:21:52,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351611378] [2021-05-06 08:21:52,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:21:52,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:52,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:21:52,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:21:52,551 INFO L87 Difference]: Start difference. First operand 200 states and 259 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:21:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:52,593 INFO L93 Difference]: Finished difference Result 262 states and 359 transitions. [2021-05-06 08:21:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:21:52,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-05-06 08:21:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:52,595 INFO L225 Difference]: With dead ends: 262 [2021-05-06 08:21:52,595 INFO L226 Difference]: Without dead ends: 262 [2021-05-06 08:21:52,596 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:21:52,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-06 08:21:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 234. [2021-05-06 08:21:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 158 states have (on average 1.2911392405063291) internal successors, (204), 165 states have internal predecessors, (204), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:21:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 316 transitions. [2021-05-06 08:21:52,606 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 316 transitions. Word has length 44 [2021-05-06 08:21:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:52,606 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 316 transitions. [2021-05-06 08:21:52,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:21:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 316 transitions. [2021-05-06 08:21:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:21:52,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:52,607 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-06 08:21:52,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:52,823 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:52,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:52,823 INFO L82 PathProgramCache]: Analyzing trace with hash -982799261, now seen corresponding path program 1 times [2021-05-06 08:21:52,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:52,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404043155] [2021-05-06 08:21:52,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:52,831 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:52,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934854115] [2021-05-06 08:21:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:52,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:21:52,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:52,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:52,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:52,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404043155] [2021-05-06 08:21:52,991 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:52,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934854115] [2021-05-06 08:21:52,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934854115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:52,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:52,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:21:52,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701103513] [2021-05-06 08:21:52,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:52,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:52,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:52,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:52,993 INFO L87 Difference]: Start difference. First operand 234 states and 316 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-05-06 08:21:53,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:53,074 INFO L93 Difference]: Finished difference Result 245 states and 326 transitions. [2021-05-06 08:21:53,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:21:53,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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 42 [2021-05-06 08:21:53,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:53,076 INFO L225 Difference]: With dead ends: 245 [2021-05-06 08:21:53,076 INFO L226 Difference]: Without dead ends: 245 [2021-05-06 08:21:53,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:53,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-06 08:21:53,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2021-05-06 08:21:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 165 states have (on average 1.2787878787878788) internal successors, (211), 171 states have internal predecessors, (211), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:21:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 323 transitions. [2021-05-06 08:21:53,085 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 323 transitions. Word has length 42 [2021-05-06 08:21:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:53,085 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 323 transitions. [2021-05-06 08:21:53,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-05-06 08:21:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 323 transitions. [2021-05-06 08:21:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:21:53,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:53,086 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:53,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:21:53,301 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:53,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:53,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1867030118, now seen corresponding path program 2 times [2021-05-06 08:21:53,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:53,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038176951] [2021-05-06 08:21:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:53,307 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:53,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709343045] [2021-05-06 08:21:53,308 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 [2021-05-06 08:21:53,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:53,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:53,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:21:53,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:53,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-06 08:21:53,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:53,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038176951] [2021-05-06 08:21:53,442 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:53,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709343045] [2021-05-06 08:21:53,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709343045] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:53,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:53,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:21:53,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021308480] [2021-05-06 08:21:53,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:21:53,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:53,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:21:53,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:21:53,443 INFO L87 Difference]: Start difference. First operand 241 states and 323 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:21:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:53,521 INFO L93 Difference]: Finished difference Result 379 states and 553 transitions. [2021-05-06 08:21:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:21:53,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-05-06 08:21:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:53,524 INFO L225 Difference]: With dead ends: 379 [2021-05-06 08:21:53,524 INFO L226 Difference]: Without dead ends: 379 [2021-05-06 08:21:53,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:21:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-06 08:21:53,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 265. [2021-05-06 08:21:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 189 states have (on average 1.2962962962962963) internal successors, (245), 195 states have internal predecessors, (245), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:21:53,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2021-05-06 08:21:53,537 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 43 [2021-05-06 08:21:53,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:53,537 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2021-05-06 08:21:53,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:21:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2021-05-06 08:21:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:21:53,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:53,538 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-05-06 08:21:53,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:21:53,761 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:53,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1204922772, now seen corresponding path program 1 times [2021-05-06 08:21:53,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:53,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856858544] [2021-05-06 08:21:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:53,769 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:53,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789261036] [2021-05-06 08:21:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:53,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:21:53,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:53,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 08:21:54,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:54,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856858544] [2021-05-06 08:21:54,004 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:54,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789261036] [2021-05-06 08:21:54,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789261036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:54,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:54,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:21:54,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046830074] [2021-05-06 08:21:54,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:21:54,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:54,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:21:54,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:21:54,007 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:21:54,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:54,274 INFO L93 Difference]: Finished difference Result 339 states and 477 transitions. [2021-05-06 08:21:54,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:21:54,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-05-06 08:21:54,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:54,276 INFO L225 Difference]: With dead ends: 339 [2021-05-06 08:21:54,276 INFO L226 Difference]: Without dead ends: 339 [2021-05-06 08:21:54,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:54,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-06 08:21:54,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 296. [2021-05-06 08:21:54,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 203 states have (on average 1.3103448275862069) internal successors, (266), 211 states have internal predecessors, (266), 73 states have call successors, (73), 20 states have call predecessors, (73), 19 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 08:21:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 410 transitions. [2021-05-06 08:21:54,288 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 410 transitions. Word has length 46 [2021-05-06 08:21:54,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:54,288 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 410 transitions. [2021-05-06 08:21:54,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:21:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 410 transitions. [2021-05-06 08:21:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 08:21:54,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:54,289 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:54,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:21:54,509 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:54,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2021-05-06 08:21:54,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:54,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555325596] [2021-05-06 08:21:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:54,516 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:54,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621101404] [2021-05-06 08:21:54,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:54,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 08:21:54,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:54,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:21:54,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:54,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555325596] [2021-05-06 08:21:54,827 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:54,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621101404] [2021-05-06 08:21:54,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621101404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:54,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:54,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:21:54,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788951254] [2021-05-06 08:21:54,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:21:54,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:54,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:21:54,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:54,829 INFO L87 Difference]: Start difference. First operand 296 states and 410 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:55,290 INFO L93 Difference]: Finished difference Result 341 states and 478 transitions. [2021-05-06 08:21:55,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:21:55,290 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2021-05-06 08:21:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:55,292 INFO L225 Difference]: With dead ends: 341 [2021-05-06 08:21:55,292 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 08:21:55,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:21:55,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 08:21:55,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2021-05-06 08:21:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 225 states have (on average 1.3155555555555556) internal successors, (296), 235 states have internal predecessors, (296), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2021-05-06 08:21:55,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 472 transitions. [2021-05-06 08:21:55,303 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 472 transitions. Word has length 58 [2021-05-06 08:21:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:55,303 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 472 transitions. [2021-05-06 08:21:55,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 472 transitions. [2021-05-06 08:21:55,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 08:21:55,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:55,304 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:55,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:55,527 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:55,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:55,527 INFO L82 PathProgramCache]: Analyzing trace with hash -80402644, now seen corresponding path program 1 times [2021-05-06 08:21:55,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:55,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652800201] [2021-05-06 08:21:55,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:55,534 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:55,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005066534] [2021-05-06 08:21:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:21:55,607 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:21:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:21:55,637 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:21:55,701 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 08:21:55,702 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 08:21:55,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:55,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:21:55 BasicIcfg [2021-05-06 08:21:55,961 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:21:55,962 INFO L168 Benchmark]: Toolchain (without parser) took 11693.59 ms. Allocated memory was 206.6 MB in the beginning and 298.8 MB in the end (delta: 92.3 MB). Free memory was 171.8 MB in the beginning and 167.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 97.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:21:55,962 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 206.6 MB. Free memory is still 188.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:21:55,962 INFO L168 Benchmark]: CACSL2BoogieTranslator took 197.66 ms. Allocated memory is still 206.6 MB. Free memory was 171.6 MB in the beginning and 161.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:21:55,962 INFO L168 Benchmark]: Boogie Preprocessor took 77.81 ms. Allocated memory is still 206.6 MB. Free memory was 161.4 MB in the beginning and 189.8 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:21:55,962 INFO L168 Benchmark]: RCFGBuilder took 423.45 ms. Allocated memory is still 206.6 MB. Free memory was 189.8 MB in the beginning and 172.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:21:55,962 INFO L168 Benchmark]: IcfgTransformer took 15.54 ms. Allocated memory is still 206.6 MB. Free memory was 172.0 MB in the beginning and 170.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:21:55,962 INFO L168 Benchmark]: TraceAbstraction took 10973.23 ms. Allocated memory was 206.6 MB in the beginning and 298.8 MB in the end (delta: 92.3 MB). Free memory was 170.3 MB in the beginning and 167.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 96.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:21:55,963 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 206.6 MB. Free memory is still 188.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 197.66 ms. Allocated memory is still 206.6 MB. Free memory was 171.6 MB in the beginning and 161.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 77.81 ms. Allocated memory is still 206.6 MB. Free memory was 161.4 MB in the beginning and 189.8 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 423.45 ms. Allocated memory is still 206.6 MB. Free memory was 189.8 MB in the beginning and 172.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 15.54 ms. Allocated memory is still 206.6 MB. Free memory was 172.0 MB in the beginning and 170.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10973.23 ms. Allocated memory was 206.6 MB in the beginning and 298.8 MB in the end (delta: 92.3 MB). Free memory was 170.3 MB in the beginning and 167.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 96.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=17, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=2, b=3, counter=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=2, b=3, c=2, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] COND TRUE counter++<5 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] COND FALSE !(counter++<5) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=7] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=7] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10884.5ms, OverallIterations: 20, TraceHistogramMax: 5, EmptinessCheckTime: 24.3ms, AutomataDifference: 2403.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 946 SDtfs, 856 SDslu, 3508 SDs, 0 SdLazy, 1778 SolverSat, 381 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1375.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 696 GetRequests, 549 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1041.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=336occurred in iteration=19, InterpolantAutomatonStates: 150, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 172.1ms AutomataMinimizationTime, 19 MinimizatonAttempts, 271 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 190.3ms SsaConstructionTime, 528.8ms SatisfiabilityAnalysisTime, 2337.4ms InterpolantComputationTime, 742 NumberOfCodeBlocks, 742 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 660 ConstructedInterpolants, 0 QuantifiedInterpolants, 2655 SizeOfPredicates, 64 NumberOfNonLiveVariables, 3220 ConjunctsInSsa, 267 ConjunctsInUnsatCore, 19 InterpolantComputations, 10 PerfectInterpolantSequences, 174/242 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...