/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_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:22:22,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:22:22,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:22:22,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:22:22,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:22:22,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:22:22,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:22:22,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:22:22,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:22:22,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:22:22,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:22:22,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:22:22,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:22:22,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:22:22,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:22:22,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:22:22,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:22:22,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:22:22,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:22:22,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:22:22,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:22:22,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:22:22,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:22:22,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:22:22,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 08:22:22,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 08:22:22,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 08:22:22,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 08:22:22,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 08:22:22,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 08:22:22,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 08:22:22,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 08:22:22,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 08:22:22,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 08:22:22,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 08:22:22,366 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 08:22:22,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 08:22:22,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 08:22:22,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:22:22,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:22:22,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:22:22,373 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:22:22,389 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:22:22,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:22:22,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:22:22,392 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:22:22,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:22:22,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:22:22,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:22:22,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:22:22,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:22:22,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:22:22,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:22:22,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:22:22,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:22:22,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:22:22,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:22:22,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:22:22,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:22:22,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:22:22,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:22:22,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:22:22,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:22:22,396 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:22:22,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:22:22,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:22:22,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:22:22,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:22:22,774 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:22:22,774 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:22:22,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c [2021-05-06 08:22:22,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/920a79fe9/c403253d54494a949311a403e290d604/FLAG9971ba551 [2021-05-06 08:22:23,208 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:22:23,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c [2021-05-06 08:22:23,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/920a79fe9/c403253d54494a949311a403e290d604/FLAG9971ba551 [2021-05-06 08:22:23,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/920a79fe9/c403253d54494a949311a403e290d604 [2021-05-06 08:22:23,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:22:23,242 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:22:23,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:23,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:22:23,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:22:23,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:23" (1/1) ... [2021-05-06 08:22:23,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68586cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:23, skipping insertion in model container [2021-05-06 08:22:23,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:23" (1/1) ... [2021-05-06 08:22:23,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:22:23,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:22:23,419 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_valuebound2.c[490,503] [2021-05-06 08:22:23,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:23,457 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:22:23,479 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_valuebound2.c[490,503] [2021-05-06 08:22:23,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:23,541 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:22:23,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:23 WrapperNode [2021-05-06 08:22:23,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:23,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:22:23,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:22:23,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:22:23,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:23" (1/1) ... [2021-05-06 08:22:23,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:23" (1/1) ... [2021-05-06 08:22:23,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:23" (1/1) ... [2021-05-06 08:22:23,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:23" (1/1) ... [2021-05-06 08:22:23,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:23" (1/1) ... [2021-05-06 08:22:23,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:23" (1/1) ... [2021-05-06 08:22:23,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:23" (1/1) ... [2021-05-06 08:22:23,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:22:23,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:22:23,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:22:23,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:22:23,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:22:23,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:22:23,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:22:23,639 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:22:23,639 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:22:23,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:22:23,639 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:22:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:22:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:22:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:22:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:22:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:22:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:22:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:22:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:22:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:22:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:22:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:22:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:22:23,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:22:23,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:22:23,901 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:22:23,902 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:22:23,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:23 BoogieIcfgContainer [2021-05-06 08:22:23,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:22:23,903 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:22:23,904 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:22:23,904 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:22:23,906 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:23" (1/1) ... [2021-05-06 08:22:23,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:23 BasicIcfg [2021-05-06 08:22:23,920 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:22:23,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:22:23,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:22:23,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:22:23,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:22:23" (1/4) ... [2021-05-06 08:22:23,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477e91e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:23, skipping insertion in model container [2021-05-06 08:22:23,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:23" (2/4) ... [2021-05-06 08:22:23,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477e91e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:23, skipping insertion in model container [2021-05-06 08:22:23,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:23" (3/4) ... [2021-05-06 08:22:23,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477e91e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:23, skipping insertion in model container [2021-05-06 08:22:23,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:23" (4/4) ... [2021-05-06 08:22:23,926 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound2.cJordan [2021-05-06 08:22:23,930 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:22:23,933 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:22:23,946 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:22:23,961 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:22:23,961 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:22:23,962 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:22:23,962 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:22:23,962 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:22:23,962 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:22:23,962 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:22:23,962 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:22:23,973 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:22:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:22:23,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:23,980 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:23,980 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:23,984 INFO L82 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2021-05-06 08:22:23,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:23,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458993739] [2021-05-06 08:22:23,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:24,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:22:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:24,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:22:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:24,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:22:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:24,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:22:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:24,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:22:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:24,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:24,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458993739] [2021-05-06 08:22:24,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458993739] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:24,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:24,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:22:24,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052799302] [2021-05-06 08:22:24,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:22:24,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:24,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:22:24,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:24,329 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:24,434 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-06 08:22:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:22:24,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:22:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:24,442 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:22:24,442 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:22:24,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:22:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:22:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:22:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 08:22:24,481 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-06 08:22:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:24,481 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 08:22:24,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 08:22:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:22:24,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:24,484 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:24,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:22:24,485 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:24,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:24,487 INFO L82 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2021-05-06 08:22:24,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:24,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110891029] [2021-05-06 08:22:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:24,517 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:24,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760530736] [2021-05-06 08:22:24,518 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 08:22:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:24,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:24,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:24,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:24,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:24,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110891029] [2021-05-06 08:22:24,696 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:24,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760530736] [2021-05-06 08:22:24,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760530736] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:24,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:24,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:22:24,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009960922] [2021-05-06 08:22:24,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:22:24,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:24,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:22:24,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:24,699 INFO L87 Difference]: Start difference. First operand 35 states and 44 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:24,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:24,770 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-06 08:22:24,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:24,771 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-06 08:22:24,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:24,772 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:22:24,772 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:22:24,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:24,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:22:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-06 08:22:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:22:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 08:22:24,780 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-06 08:22:24,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:24,781 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 08:22:24,781 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:24,781 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 08:22:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:22:24,782 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:24,782 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:25,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:22:25,007 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:25,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:25,008 INFO L82 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2021-05-06 08:22:25,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:25,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649693818] [2021-05-06 08:22:25,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:25,063 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:25,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331191953] [2021-05-06 08:22:25,063 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 08:22:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:25,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 08:22:25,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:25,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:25,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:25,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649693818] [2021-05-06 08:22:25,554 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:25,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331191953] [2021-05-06 08:22:25,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331191953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:25,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:25,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:25,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855575530] [2021-05-06 08:22:25,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:25,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:25,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:25,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:25,556 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:22:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:25,842 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2021-05-06 08:22:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:22:25,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-06 08:22:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:25,847 INFO L225 Difference]: With dead ends: 61 [2021-05-06 08:22:25,847 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 08:22:25,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:25,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 08:22:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2021-05-06 08:22:25,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:22:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 08:22:25,873 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-06 08:22:25,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:25,873 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 08:22:25,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:22:25,874 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 08:22:25,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:22:25,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:25,875 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:26,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:26,089 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:26,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:26,090 INFO L82 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2021-05-06 08:22:26,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:26,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892108887] [2021-05-06 08:22:26,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:26,109 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:26,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885467172] [2021-05-06 08:22:26,110 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 08:22:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:26,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:22:26,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:26,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:26,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:26,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892108887] [2021-05-06 08:22:26,325 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:26,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885467172] [2021-05-06 08:22:26,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885467172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:26,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:26,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:26,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393275390] [2021-05-06 08:22:26,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:26,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:26,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:26,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:26,327 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:26,512 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2021-05-06 08:22:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:26,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 08:22:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:26,514 INFO L225 Difference]: With dead ends: 96 [2021-05-06 08:22:26,514 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 08:22:26,514 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 08:22:26,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-06 08:22:26,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:22:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-06 08:22:26,522 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-06 08:22:26,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:26,522 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-06 08:22:26,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:26,522 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-06 08:22:26,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:26,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:26,523 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:26,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:26,729 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:26,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:26,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2021-05-06 08:22:26,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:26,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941208984] [2021-05-06 08:22:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:26,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:26,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972953099] [2021-05-06 08:22:26,739 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 08:22:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:26,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:22:26,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:26,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:27,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:27,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941208984] [2021-05-06 08:22:27,043 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:27,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972953099] [2021-05-06 08:22:27,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972953099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:27,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:27,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:27,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921120477] [2021-05-06 08:22:27,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:27,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:27,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:27,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:27,045 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:22:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:27,351 INFO L93 Difference]: Finished difference Result 84 states and 112 transitions. [2021-05-06 08:22:27,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:27,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 08:22:27,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:27,352 INFO L225 Difference]: With dead ends: 84 [2021-05-06 08:22:27,352 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 08:22:27,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:27,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 08:22:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-05-06 08:22:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:22:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-06 08:22:27,361 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-06 08:22:27,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:27,362 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-06 08:22:27,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:22:27,362 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-06 08:22:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:27,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:27,363 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:27,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:27,573 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:27,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:27,573 INFO L82 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2021-05-06 08:22:27,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:27,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977516385] [2021-05-06 08:22:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:27,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:27,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108830667] [2021-05-06 08:22:27,586 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 08:22:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:27,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 08:22:27,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:27,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:27,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:27,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977516385] [2021-05-06 08:22:27,888 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:27,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108830667] [2021-05-06 08:22:27,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108830667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:27,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:27,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:27,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264048165] [2021-05-06 08:22:27,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:27,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:27,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:27,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:27,890 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:22:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:28,199 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2021-05-06 08:22:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:28,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-06 08:22:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:28,200 INFO L225 Difference]: With dead ends: 103 [2021-05-06 08:22:28,200 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 08:22:28,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:28,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 08:22:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2021-05-06 08:22:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:22:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-05-06 08:22:28,225 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2021-05-06 08:22:28,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:28,225 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-05-06 08:22:28,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:22:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-05-06 08:22:28,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:28,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:28,226 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:28,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:22:28,455 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:28,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:28,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2021-05-06 08:22:28,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:28,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947459572] [2021-05-06 08:22:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:28,469 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:28,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837278807] [2021-05-06 08:22:28,469 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 08:22:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:28,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:28,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:28,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:22:28,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:28,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947459572] [2021-05-06 08:22:28,679 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:28,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837278807] [2021-05-06 08:22:28,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837278807] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:28,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:28,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 08:22:28,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387907322] [2021-05-06 08:22:28,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:28,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:28,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:28,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:28,681 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:28,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:28,814 INFO L93 Difference]: Finished difference Result 105 states and 138 transitions. [2021-05-06 08:22:28,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:28,814 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 08:22:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:28,816 INFO L225 Difference]: With dead ends: 105 [2021-05-06 08:22:28,816 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 08:22:28,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:28,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 08:22:28,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 08:22:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 69 states have internal predecessors, (84), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:22:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2021-05-06 08:22:28,835 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 47 [2021-05-06 08:22:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:28,837 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2021-05-06 08:22:28,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:28,837 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2021-05-06 08:22:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:28,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:28,842 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 08:22:29,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:29,057 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:29,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:29,057 INFO L82 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2021-05-06 08:22:29,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:29,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082781172] [2021-05-06 08:22:29,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:29,073 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:29,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199825100] [2021-05-06 08:22:29,074 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 08:22:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:29,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:22:29,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:29,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:29,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:29,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082781172] [2021-05-06 08:22:29,293 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:29,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199825100] [2021-05-06 08:22:29,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199825100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:29,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:29,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:22:29,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056548501] [2021-05-06 08:22:29,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:22:29,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:29,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:22:29,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:29,295 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 08:22:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:29,427 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2021-05-06 08:22:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:22:29,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 47 [2021-05-06 08:22:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:29,429 INFO L225 Difference]: With dead ends: 111 [2021-05-06 08:22:29,429 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 08:22:29,429 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 08:22:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-05-06 08:22:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:22:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2021-05-06 08:22:29,434 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 47 [2021-05-06 08:22:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:29,434 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2021-05-06 08:22:29,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 08:22:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2021-05-06 08:22:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:29,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:29,435 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:29,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:29,659 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:29,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:29,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2021-05-06 08:22:29,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:29,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121912239] [2021-05-06 08:22:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:29,675 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:29,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504265388] [2021-05-06 08:22:29,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:29,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:29,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:29,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:22:29,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:29,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:29,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:29,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121912239] [2021-05-06 08:22:29,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:29,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504265388] [2021-05-06 08:22:29,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504265388] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:29,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:29,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:29,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375961263] [2021-05-06 08:22:29,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:29,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:29,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:29,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:29,820 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:29,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:29,888 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2021-05-06 08:22:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:29,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-06 08:22:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:29,891 INFO L225 Difference]: With dead ends: 110 [2021-05-06 08:22:29,891 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 08:22:29,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:29,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 08:22:29,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-05-06 08:22:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:22:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-05-06 08:22:29,900 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 47 [2021-05-06 08:22:29,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:29,900 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-05-06 08:22:29,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:29,900 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-05-06 08:22:29,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:22:29,902 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:29,902 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:30,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:22:30,125 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:30,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2021-05-06 08:22:30,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:30,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39944113] [2021-05-06 08:22:30,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:30,152 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:30,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448499067] [2021-05-06 08:22:30,153 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 08:22:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:30,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:30,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:30,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 08:22:30,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:30,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39944113] [2021-05-06 08:22:30,320 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:30,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448499067] [2021-05-06 08:22:30,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448499067] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:30,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:30,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:30,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956699232] [2021-05-06 08:22:30,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:30,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:30,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:30,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:30,323 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:22:30,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:30,366 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2021-05-06 08:22:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:22:30,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-06 08:22:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:30,368 INFO L225 Difference]: With dead ends: 128 [2021-05-06 08:22:30,368 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 08:22:30,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:30,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 08:22:30,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2021-05-06 08:22:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 70 states have internal predecessors, (75), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 08:22:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2021-05-06 08:22:30,379 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 52 [2021-05-06 08:22:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:30,379 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2021-05-06 08:22:30,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:22:30,380 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2021-05-06 08:22:30,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:22:30,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:30,381 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:30,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:30,597 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:30,597 INFO L82 PathProgramCache]: Analyzing trace with hash 846041443, now seen corresponding path program 1 times [2021-05-06 08:22:30,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:30,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632570309] [2021-05-06 08:22:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:30,607 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:30,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478647013] [2021-05-06 08:22:30,607 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 08:22:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:30,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:22:30,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:30,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:22:30,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:30,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632570309] [2021-05-06 08:22:30,855 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:30,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478647013] [2021-05-06 08:22:30,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478647013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:30,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:30,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:30,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106901090] [2021-05-06 08:22:30,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:30,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:30,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:30,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:30,857 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:31,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:31,120 INFO L93 Difference]: Finished difference Result 164 states and 229 transitions. [2021-05-06 08:22:31,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:31,125 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2021-05-06 08:22:31,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:31,129 INFO L225 Difference]: With dead ends: 164 [2021-05-06 08:22:31,129 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 08:22:31,130 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 08:22:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 92. [2021-05-06 08:22:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:22:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2021-05-06 08:22:31,143 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 52 [2021-05-06 08:22:31,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:31,144 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2021-05-06 08:22:31,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:31,144 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2021-05-06 08:22:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 08:22:31,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:31,145 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-05-06 08:22:31,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:31,365 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:31,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:31,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2021-05-06 08:22:31,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:31,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369966865] [2021-05-06 08:22:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:31,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:31,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502700933] [2021-05-06 08:22:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:31,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 08:22:31,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:31,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 08:22:31,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:31,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369966865] [2021-05-06 08:22:31,752 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:31,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502700933] [2021-05-06 08:22:31,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502700933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:31,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:31,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:31,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55299118] [2021-05-06 08:22:31,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:31,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:31,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:31,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:31,753 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:32,187 INFO L93 Difference]: Finished difference Result 176 states and 241 transitions. [2021-05-06 08:22:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:32,187 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-06 08:22:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:32,191 INFO L225 Difference]: With dead ends: 176 [2021-05-06 08:22:32,191 INFO L226 Difference]: Without dead ends: 175 [2021-05-06 08:22:32,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:32,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-06 08:22:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-05-06 08:22:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 95 states have (on average 1.168421052631579) internal successors, (111), 102 states have internal predecessors, (111), 63 states have call successors, (63), 13 states have call predecessors, (63), 12 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 08:22:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 235 transitions. [2021-05-06 08:22:32,199 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 235 transitions. Word has length 64 [2021-05-06 08:22:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:32,200 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 235 transitions. [2021-05-06 08:22:32,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 235 transitions. [2021-05-06 08:22:32,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:22:32,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:32,201 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-05-06 08:22:32,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:22:32,417 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:32,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:32,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1523533001, now seen corresponding path program 2 times [2021-05-06 08:22:32,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:32,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062047445] [2021-05-06 08:22:32,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:32,425 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:32,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987345302] [2021-05-06 08:22:32,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:32,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:32,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:32,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:22:32,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:32,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:22:32,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:32,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062047445] [2021-05-06 08:22:32,633 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:32,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987345302] [2021-05-06 08:22:32,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987345302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:32,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:32,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:32,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427452575] [2021-05-06 08:22:32,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:32,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:32,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:32,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:32,635 INFO L87 Difference]: Start difference. First operand 171 states and 235 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:32,926 INFO L93 Difference]: Finished difference Result 281 states and 417 transitions. [2021-05-06 08:22:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:32,926 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-06 08:22:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:32,929 INFO L225 Difference]: With dead ends: 281 [2021-05-06 08:22:32,929 INFO L226 Difference]: Without dead ends: 281 [2021-05-06 08:22:32,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-06 08:22:32,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 196. [2021-05-06 08:22:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 118 states have internal predecessors, (134), 71 states have call successors, (71), 13 states have call predecessors, (71), 12 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 08:22:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 274 transitions. [2021-05-06 08:22:32,940 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 274 transitions. Word has length 69 [2021-05-06 08:22:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:32,941 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 274 transitions. [2021-05-06 08:22:32,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 274 transitions. [2021-05-06 08:22:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:22:32,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:32,942 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:33,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:22:33,157 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:33,157 INFO L82 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2021-05-06 08:22:33,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:33,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258425521] [2021-05-06 08:22:33,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:33,194 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:33,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991460142] [2021-05-06 08:22:33,194 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 08:22:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:33,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 08:22:33,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:33,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 08:22:33,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:33,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258425521] [2021-05-06 08:22:33,513 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:33,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991460142] [2021-05-06 08:22:33,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991460142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:33,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:33,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:33,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307147846] [2021-05-06 08:22:33,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:33,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:33,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:33,514 INFO L87 Difference]: Start difference. First operand 196 states and 274 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:22:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:33,763 INFO L93 Difference]: Finished difference Result 211 states and 287 transitions. [2021-05-06 08:22:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:33,764 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-06 08:22:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:33,765 INFO L225 Difference]: With dead ends: 211 [2021-05-06 08:22:33,765 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 08:22:33,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:33,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 08:22:33,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2021-05-06 08:22:33,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 124 states have internal predecessors, (139), 69 states have call successors, (69), 15 states have call predecessors, (69), 14 states have return successors, (67), 62 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-06 08:22:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 275 transitions. [2021-05-06 08:22:33,777 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 275 transitions. Word has length 74 [2021-05-06 08:22:33,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:33,778 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 275 transitions. [2021-05-06 08:22:33,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:22:33,778 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 275 transitions. [2021-05-06 08:22:33,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 08:22:33,779 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:33,779 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:33,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:22:33,993 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:33,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2021-05-06 08:22:33,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:33,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250065384] [2021-05-06 08:22:33,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:34,001 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:34,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984036248] [2021-05-06 08:22:34,001 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 08:22:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:34,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:22:34,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:34,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-05-06 08:22:34,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:34,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250065384] [2021-05-06 08:22:34,257 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:34,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984036248] [2021-05-06 08:22:34,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984036248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:34,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:34,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:22:34,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295296708] [2021-05-06 08:22:34,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:22:34,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:34,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:22:34,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:34,258 INFO L87 Difference]: Start difference. First operand 202 states and 275 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:34,475 INFO L93 Difference]: Finished difference Result 206 states and 283 transitions. [2021-05-06 08:22:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:22:34,475 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 72 [2021-05-06 08:22:34,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:34,477 INFO L225 Difference]: With dead ends: 206 [2021-05-06 08:22:34,477 INFO L226 Difference]: Without dead ends: 206 [2021-05-06 08:22:34,477 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-06 08:22:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 190. [2021-05-06 08:22:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 112 states have internal predecessors, (121), 69 states have call successors, (69), 15 states have call predecessors, (69), 14 states have return successors, (67), 62 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-06 08:22:34,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 257 transitions. [2021-05-06 08:22:34,485 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 257 transitions. Word has length 72 [2021-05-06 08:22:34,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:34,485 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 257 transitions. [2021-05-06 08:22:34,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:34,485 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 257 transitions. [2021-05-06 08:22:34,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:34,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:34,486 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:34,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:34,701 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:34,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:34,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1813106047, now seen corresponding path program 2 times [2021-05-06 08:22:34,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:34,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166481130] [2021-05-06 08:22:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:34,708 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:34,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813435684] [2021-05-06 08:22:34,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:34,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:34,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:34,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:22:34,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:34,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-05-06 08:22:34,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:34,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166481130] [2021-05-06 08:22:34,971 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:34,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813435684] [2021-05-06 08:22:34,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813435684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:34,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:34,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:34,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752369542] [2021-05-06 08:22:34,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:34,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:34,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:34,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:34,973 INFO L87 Difference]: Start difference. First operand 190 states and 257 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:35,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:35,242 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2021-05-06 08:22:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:22:35,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 77 [2021-05-06 08:22:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:35,244 INFO L225 Difference]: With dead ends: 174 [2021-05-06 08:22:35,244 INFO L226 Difference]: Without dead ends: 152 [2021-05-06 08:22:35,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:22:35,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-06 08:22:35,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-05-06 08:22:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 87 states have (on average 1.103448275862069) internal successors, (96), 91 states have internal predecessors, (96), 50 states have call successors, (50), 14 states have call predecessors, (50), 13 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:22:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 193 transitions. [2021-05-06 08:22:35,250 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 193 transitions. Word has length 77 [2021-05-06 08:22:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:35,250 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 193 transitions. [2021-05-06 08:22:35,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 193 transitions. [2021-05-06 08:22:35,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:22:35,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:35,251 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:35,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:22:35,465 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:35,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:35,466 INFO L82 PathProgramCache]: Analyzing trace with hash -747783847, now seen corresponding path program 1 times [2021-05-06 08:22:35,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:35,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517181069] [2021-05-06 08:22:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:35,474 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:35,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15066305] [2021-05-06 08:22:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:22:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:35,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 08:22:35,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:35,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 08:22:35,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:35,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517181069] [2021-05-06 08:22:35,810 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:35,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15066305] [2021-05-06 08:22:35,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15066305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:35,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:35,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:22:35,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514254522] [2021-05-06 08:22:35,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:22:35,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:35,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:22:35,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:22:35,814 INFO L87 Difference]: Start difference. First operand 151 states and 193 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:22:36,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:36,339 INFO L93 Difference]: Finished difference Result 181 states and 234 transitions. [2021-05-06 08:22:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:22:36,345 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2021-05-06 08:22:36,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:36,346 INFO L225 Difference]: With dead ends: 181 [2021-05-06 08:22:36,346 INFO L226 Difference]: Without dead ends: 181 [2021-05-06 08:22:36,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:22:36,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-06 08:22:36,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2021-05-06 08:22:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 101 states have internal predecessors, (106), 58 states have call successors, (58), 16 states have call predecessors, (58), 15 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:22:36,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 219 transitions. [2021-05-06 08:22:36,354 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 219 transitions. Word has length 79 [2021-05-06 08:22:36,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:36,354 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 219 transitions. [2021-05-06 08:22:36,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:22:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 219 transitions. [2021-05-06 08:22:36,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:22:36,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:36,355 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:36,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:22:36,569 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:36,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:36,569 INFO L82 PathProgramCache]: Analyzing trace with hash 131640819, now seen corresponding path program 1 times [2021-05-06 08:22:36,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:36,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084214151] [2021-05-06 08:22:36,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:36,579 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:36,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057665313] [2021-05-06 08:22:36,579 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 08:22:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:36,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-06 08:22:36,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:36,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 53 proven. 18 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 08:22:37,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:37,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084214151] [2021-05-06 08:22:37,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:37,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057665313] [2021-05-06 08:22:37,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057665313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:37,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:37,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:37,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749914610] [2021-05-06 08:22:37,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:37,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:37,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:37,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:37,116 INFO L87 Difference]: Start difference. First operand 170 states and 219 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:22:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:37,708 INFO L93 Difference]: Finished difference Result 175 states and 223 transitions. [2021-05-06 08:22:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:22:37,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2021-05-06 08:22:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:37,712 INFO L225 Difference]: With dead ends: 175 [2021-05-06 08:22:37,712 INFO L226 Difference]: Without dead ends: 118 [2021-05-06 08:22:37,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:22:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-06 08:22:37,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-05-06 08:22:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 65 states have (on average 1.123076923076923) internal successors, (73), 69 states have internal predecessors, (73), 43 states have call successors, (43), 10 states have call predecessors, (43), 9 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 08:22:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 157 transitions. [2021-05-06 08:22:37,718 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 157 transitions. Word has length 86 [2021-05-06 08:22:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:37,718 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 157 transitions. [2021-05-06 08:22:37,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:22:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 157 transitions. [2021-05-06 08:22:37,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:22:37,719 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:37,719 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:37,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:22:37,932 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:37,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:37,933 INFO L82 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 2 times [2021-05-06 08:22:37,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:37,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880647734] [2021-05-06 08:22:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:37,939 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:37,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051239776] [2021-05-06 08:22:37,940 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 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 08:22:38,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:38,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:38,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 92 conjunts are in the unsatisfiable core [2021-05-06 08:22:38,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:38,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 08:22:38,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:38,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880647734] [2021-05-06 08:22:38,559 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:38,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051239776] [2021-05-06 08:22:38,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051239776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:38,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:38,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:38,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326818246] [2021-05-06 08:22:38,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:38,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:38,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:38,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:38,561 INFO L87 Difference]: Start difference. First operand 118 states and 157 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:22:39,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:39,182 INFO L93 Difference]: Finished difference Result 185 states and 251 transitions. [2021-05-06 08:22:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:39,185 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2021-05-06 08:22:39,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:39,186 INFO L225 Difference]: With dead ends: 185 [2021-05-06 08:22:39,186 INFO L226 Difference]: Without dead ends: 184 [2021-05-06 08:22:39,186 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:22:39,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-06 08:22:39,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2021-05-06 08:22:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 104 states have internal predecessors, (113), 67 states have call successors, (67), 14 states have call predecessors, (67), 13 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2021-05-06 08:22:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 245 transitions. [2021-05-06 08:22:39,193 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 245 transitions. Word has length 91 [2021-05-06 08:22:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:39,194 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 245 transitions. [2021-05-06 08:22:39,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:22:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 245 transitions. [2021-05-06 08:22:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 08:22:39,195 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:39,195 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:39,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:39,409 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:39,409 INFO L82 PathProgramCache]: Analyzing trace with hash 561452732, now seen corresponding path program 2 times [2021-05-06 08:22:39,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:39,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3126741] [2021-05-06 08:22:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:39,424 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:39,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136244850] [2021-05-06 08:22:39,425 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 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 08:22:39,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:39,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:39,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:22:39,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:39,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 134 proven. 10 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-05-06 08:22:39,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:39,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3126741] [2021-05-06 08:22:39,823 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:39,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136244850] [2021-05-06 08:22:39,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136244850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:39,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:39,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:39,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284009172] [2021-05-06 08:22:39,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:39,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:39,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:39,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:39,826 INFO L87 Difference]: Start difference. First operand 180 states and 245 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:22:40,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:40,208 INFO L93 Difference]: Finished difference Result 212 states and 288 transitions. [2021-05-06 08:22:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:40,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2021-05-06 08:22:40,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:40,212 INFO L225 Difference]: With dead ends: 212 [2021-05-06 08:22:40,212 INFO L226 Difference]: Without dead ends: 212 [2021-05-06 08:22:40,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:22:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-06 08:22:40,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 162. [2021-05-06 08:22:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 98 states have internal predecessors, (104), 54 states have call successors, (54), 14 states have call predecessors, (54), 13 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-06 08:22:40,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 210 transitions. [2021-05-06 08:22:40,222 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 210 transitions. Word has length 101 [2021-05-06 08:22:40,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:40,222 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 210 transitions. [2021-05-06 08:22:40,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:22:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 210 transitions. [2021-05-06 08:22:40,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:22:40,223 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:40,224 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:40,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:40,438 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:40,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1651080925, now seen corresponding path program 1 times [2021-05-06 08:22:40,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:40,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264269940] [2021-05-06 08:22:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:40,447 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:40,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775214440] [2021-05-06 08:22:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:40,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:22:40,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:40,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-05-06 08:22:40,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:40,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264269940] [2021-05-06 08:22:40,843 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:40,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775214440] [2021-05-06 08:22:40,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775214440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:40,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:40,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:40,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926656611] [2021-05-06 08:22:40,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:40,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:40,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:40,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:40,845 INFO L87 Difference]: Start difference. First operand 162 states and 210 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:22:41,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:41,351 INFO L93 Difference]: Finished difference Result 175 states and 229 transitions. [2021-05-06 08:22:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:41,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 104 [2021-05-06 08:22:41,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:41,352 INFO L225 Difference]: With dead ends: 175 [2021-05-06 08:22:41,353 INFO L226 Difference]: Without dead ends: 172 [2021-05-06 08:22:41,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:22:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-06 08:22:41,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 149. [2021-05-06 08:22:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 89 states have (on average 1.101123595505618) internal successors, (98), 92 states have internal predecessors, (98), 46 states have call successors, (46), 14 states have call predecessors, (46), 13 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 08:22:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 188 transitions. [2021-05-06 08:22:41,361 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 188 transitions. Word has length 104 [2021-05-06 08:22:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:41,361 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 188 transitions. [2021-05-06 08:22:41,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:22:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 188 transitions. [2021-05-06 08:22:41,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 08:22:41,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:41,363 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:41,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:22:41,577 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:41,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1706790864, now seen corresponding path program 3 times [2021-05-06 08:22:41,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:41,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379060469] [2021-05-06 08:22:41,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:41,583 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:41,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909306442] [2021-05-06 08:22:41,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:41,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:22:41,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:41,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:22:41,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:41,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 33 proven. 32 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-05-06 08:22:41,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:41,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379060469] [2021-05-06 08:22:41,892 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:41,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909306442] [2021-05-06 08:22:41,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909306442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:41,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:41,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:41,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378604353] [2021-05-06 08:22:41,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:41,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:41,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:41,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:41,893 INFO L87 Difference]: Start difference. First operand 149 states and 188 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:22:42,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:42,342 INFO L93 Difference]: Finished difference Result 175 states and 229 transitions. [2021-05-06 08:22:42,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:22:42,342 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 116 [2021-05-06 08:22:42,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:42,343 INFO L225 Difference]: With dead ends: 175 [2021-05-06 08:22:42,343 INFO L226 Difference]: Without dead ends: 172 [2021-05-06 08:22:42,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:22:42,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-06 08:22:42,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 145. [2021-05-06 08:22:42,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 88 states have internal predecessors, (93), 45 states have call successors, (45), 14 states have call predecessors, (45), 13 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 08:22:42,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 182 transitions. [2021-05-06 08:22:42,349 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 182 transitions. Word has length 116 [2021-05-06 08:22:42,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:42,350 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 182 transitions. [2021-05-06 08:22:42,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:22:42,350 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 182 transitions. [2021-05-06 08:22:42,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-06 08:22:42,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:42,351 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:42,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:22:42,565 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1478543105, now seen corresponding path program 2 times [2021-05-06 08:22:42,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:42,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965279704] [2021-05-06 08:22:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:42,571 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:42,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282958928] [2021-05-06 08:22:42,572 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:42,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:42,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:42,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:22:42,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:42,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 183 proven. 18 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-05-06 08:22:42,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:42,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965279704] [2021-05-06 08:22:42,955 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:42,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282958928] [2021-05-06 08:22:42,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282958928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:42,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:42,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:42,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849832807] [2021-05-06 08:22:42,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:42,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:42,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:42,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:42,956 INFO L87 Difference]: Start difference. First operand 145 states and 182 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:22:43,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:43,158 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-05-06 08:22:43,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:43,158 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 119 [2021-05-06 08:22:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:43,158 INFO L225 Difference]: With dead ends: 60 [2021-05-06 08:22:43,158 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:22:43,159 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:43,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:22:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:22:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:22:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:22:43,159 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 119 [2021-05-06 08:22:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:43,159 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:22:43,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:22:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:22:43,160 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:22:43,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:43,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:43 BasicIcfg [2021-05-06 08:22:43,370 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:22:43,370 INFO L168 Benchmark]: Toolchain (without parser) took 20128.84 ms. Allocated memory was 174.1 MB in the beginning and 345.0 MB in the end (delta: 170.9 MB). Free memory was 139.6 MB in the beginning and 156.3 MB in the end (delta: -16.7 MB). Peak memory consumption was 155.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:43,371 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 174.1 MB. Free memory was 156.2 MB in the beginning and 156.1 MB in the end (delta: 89.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:22:43,371 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.00 ms. Allocated memory is still 174.1 MB. Free memory was 139.3 MB in the beginning and 157.1 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:43,371 INFO L168 Benchmark]: Boogie Preprocessor took 41.28 ms. Allocated memory is still 174.1 MB. Free memory was 157.1 MB in the beginning and 155.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:43,378 INFO L168 Benchmark]: RCFGBuilder took 318.19 ms. Allocated memory is still 174.1 MB. Free memory was 155.6 MB in the beginning and 137.7 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:43,378 INFO L168 Benchmark]: IcfgTransformer took 16.84 ms. Allocated memory is still 174.1 MB. Free memory was 137.7 MB in the beginning and 136.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:43,378 INFO L168 Benchmark]: TraceAbstraction took 19448.37 ms. Allocated memory was 174.1 MB in the beginning and 345.0 MB in the end (delta: 170.9 MB). Free memory was 136.2 MB in the beginning and 156.3 MB in the end (delta: -20.1 MB). Peak memory consumption was 151.9 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:43,378 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 174.1 MB. Free memory was 156.2 MB in the beginning and 156.1 MB in the end (delta: 89.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 295.00 ms. Allocated memory is still 174.1 MB. Free memory was 139.3 MB in the beginning and 157.1 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.28 ms. Allocated memory is still 174.1 MB. Free memory was 157.1 MB in the beginning and 155.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 318.19 ms. Allocated memory is still 174.1 MB. Free memory was 155.6 MB in the beginning and 137.7 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.84 ms. Allocated memory is still 174.1 MB. Free memory was 137.7 MB in the beginning and 136.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19448.37 ms. Allocated memory was 174.1 MB in the beginning and 345.0 MB in the end (delta: 170.9 MB). Free memory was 136.2 MB in the beginning and 156.3 MB in the end (delta: -20.1 MB). Peak memory consumption was 151.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19401.5ms, OverallIterations: 23, TraceHistogramMax: 13, EmptinessCheckTime: 35.0ms, AutomataDifference: 6749.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1156 SDtfs, 1214 SDslu, 6108 SDs, 0 SdLazy, 4878 SolverSat, 1121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3413.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1638 GetRequests, 1289 SyntacticMatches, 7 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 4133.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=202occurred in iteration=14, InterpolantAutomatonStates: 273, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 235.0ms AutomataMinimizationTime, 23 MinimizatonAttempts, 407 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 227.6ms SsaConstructionTime, 673.9ms SatisfiabilityAnalysisTime, 5555.9ms InterpolantComputationTime, 1524 NumberOfCodeBlocks, 1477 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1501 ConstructedInterpolants, 0 QuantifiedInterpolants, 6100 SizeOfPredicates, 144 NumberOfNonLiveVariables, 4775 ConjunctsInSsa, 552 ConjunctsInUnsatCore, 23 InterpolantComputations, 5 PerfectInterpolantSequences, 2269/2491 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...