/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/ps5-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:27:26,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:27:26,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:27:26,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:27:26,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:27:26,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:27:26,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:27:26,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:27:26,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:27:26,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:27:26,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:27:26,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:27:26,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:27:26,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:27:26,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:27:26,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:27:26,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:27:26,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:27:26,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:27:26,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:27:26,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:27:26,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:27:26,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:27:26,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:27:26,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 10:27:26,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 10:27:26,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 10:27:26,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 10:27:26,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 10:27:26,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 10:27:26,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 10:27:26,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 10:27:26,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 10:27:26,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 10:27:26,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 10:27:26,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 10:27:26,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 10:27:26,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 10:27:26,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:27:26,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:27:26,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:27:26,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:27:26,114 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:27:26,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:27:26,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:27:26,116 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:27:26,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:27:26,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:27:26,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:27:26,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:27:26,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:27:26,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:27:26,118 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:27:26,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:27:26,119 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:27:26,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:27:26,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:27:26,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:27:26,119 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:27:26,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:27:26,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:27:26,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:27:26,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:27:26,120 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:27:26,120 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:27:26,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:27:26,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:27:26,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:27:26,373 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:27:26,373 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:27:26,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound1.c [2021-05-06 10:27:26,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e399f37e4/549cde05f28647039af39a1cd8db6ae1/FLAGe880ca79c [2021-05-06 10:27:26,773 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:27:26,774 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound1.c [2021-05-06 10:27:26,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e399f37e4/549cde05f28647039af39a1cd8db6ae1/FLAGe880ca79c [2021-05-06 10:27:27,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e399f37e4/549cde05f28647039af39a1cd8db6ae1 [2021-05-06 10:27:27,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:27:27,222 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:27:27,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:27:27,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:27:27,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:27:27,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:27:27" (1/1) ... [2021-05-06 10:27:27,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2416430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:27, skipping insertion in model container [2021-05-06 10:27:27,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:27:27" (1/1) ... [2021-05-06 10:27:27,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:27:27,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:27:27,341 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/ps5-ll_unwindbound1.c[458,471] [2021-05-06 10:27:27,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:27:27,368 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:27:27,408 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/ps5-ll_unwindbound1.c[458,471] [2021-05-06 10:27:27,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:27:27,426 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:27:27,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:27 WrapperNode [2021-05-06 10:27:27,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:27:27,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:27:27,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:27:27,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:27:27,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:27" (1/1) ... [2021-05-06 10:27:27,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:27" (1/1) ... [2021-05-06 10:27:27,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:27" (1/1) ... [2021-05-06 10:27:27,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:27" (1/1) ... [2021-05-06 10:27:27,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:27" (1/1) ... [2021-05-06 10:27:27,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:27" (1/1) ... [2021-05-06 10:27:27,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:27" (1/1) ... [2021-05-06 10:27:27,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:27:27,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:27:27,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:27:27,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:27:27,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:27" (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 10:27:27,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:27:27,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:27:27,524 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:27:27,525 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:27:27,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:27:27,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:27:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:27:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:27:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:27:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:27:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:27:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:27:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:27:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:27:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:27:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:27:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:27:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:27:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:27:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:27:27,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:27:27,715 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:27:27,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:27:27 BoogieIcfgContainer [2021-05-06 10:27:27,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:27:27,716 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:27:27,716 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:27:27,717 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:27:27,718 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:27:27" (1/1) ... [2021-05-06 10:27:27,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:27:27 BasicIcfg [2021-05-06 10:27:27,728 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:27:27,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:27:27,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:27:27,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:27:27,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:27:27" (1/4) ... [2021-05-06 10:27:27,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124a53ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:27:27, skipping insertion in model container [2021-05-06 10:27:27,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:27" (2/4) ... [2021-05-06 10:27:27,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124a53ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:27:27, skipping insertion in model container [2021-05-06 10:27:27,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:27:27" (3/4) ... [2021-05-06 10:27:27,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124a53ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:27:27, skipping insertion in model container [2021-05-06 10:27:27,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:27:27" (4/4) ... [2021-05-06 10:27:27,732 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound1.cJordan [2021-05-06 10:27:27,736 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:27:27,738 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:27:27,748 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:27:27,760 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:27:27,760 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:27:27,760 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:27:27,760 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:27:27,760 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:27:27,761 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:27:27,761 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:27:27,761 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:27:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:27,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:27:27,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:27,773 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:27,774 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:27,777 INFO L82 PathProgramCache]: Analyzing trace with hash 843387237, now seen corresponding path program 1 times [2021-05-06 10:27:27,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:27,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363818669] [2021-05-06 10:27:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:27,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:27:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:27,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:27:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:27,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:27,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363818669] [2021-05-06 10:27:27,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363818669] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:27:27,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:27:27,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:27:27,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865565495] [2021-05-06 10:27:27,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:27:27,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:27,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:27:27,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:27:27,997 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:27:28,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:28,050 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-06 10:27:28,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:27:28,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:27:28,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:28,056 INFO L225 Difference]: With dead ends: 30 [2021-05-06 10:27:28,056 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 10:27:28,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:27:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 10:27:28,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-06 10:27:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:27:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:27:28,079 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-06 10:27:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:28,079 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:27:28,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:27:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:27:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:27:28,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:28,080 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:28,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:27:28,081 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:28,081 INFO L82 PathProgramCache]: Analyzing trace with hash 208087835, now seen corresponding path program 1 times [2021-05-06 10:27:28,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:28,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507436762] [2021-05-06 10:27:28,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:28,094 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:28,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156156566] [2021-05-06 10:27:28,094 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 10:27:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:28,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:27:28,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:28,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:28,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:28,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507436762] [2021-05-06 10:27:28,251 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:28,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156156566] [2021-05-06 10:27:28,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156156566] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:27:28,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:27:28,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:27:28,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039704918] [2021-05-06 10:27:28,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:27:28,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:28,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:27:28,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:27:28,253 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:27:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:28,261 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 10:27:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:27:28,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 10:27:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:28,262 INFO L225 Difference]: With dead ends: 26 [2021-05-06 10:27:28,262 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:27:28,263 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:27:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:27:28,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 10:27:28,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:27:28,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 10:27:28,266 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-05-06 10:27:28,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:28,266 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 10:27:28,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:27:28,266 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 10:27:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:27:28,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:28,266 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:28,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:27:28,493 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:28,494 INFO L82 PathProgramCache]: Analyzing trace with hash 209190102, now seen corresponding path program 1 times [2021-05-06 10:27:28,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:28,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297311717] [2021-05-06 10:27:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:28,509 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:28,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134320295] [2021-05-06 10:27:28,509 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 10:27:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:28,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:27:28,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:28,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:28,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:28,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297311717] [2021-05-06 10:27:28,681 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:28,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134320295] [2021-05-06 10:27:28,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134320295] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:27:28,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:27:28,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:27:28,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645360737] [2021-05-06 10:27:28,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:27:28,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:28,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:27:28,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:27:28,683 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:27:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:28,714 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-06 10:27:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:27:28,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 10:27:28,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:28,715 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:27:28,715 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 10:27:28,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:27:28,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 10:27:28,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 10:27:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:27:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 10:27:28,719 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-06 10:27:28,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:28,719 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 10:27:28,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:27:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 10:27:28,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:27:28,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:28,720 INFO L523 BasicCegarLoop]: trace histogram [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 10:27:28,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:28,921 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:28,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:28,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1223799235, now seen corresponding path program 1 times [2021-05-06 10:27:28,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:28,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911126287] [2021-05-06 10:27:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:28,930 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:28,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377594955] [2021-05-06 10:27:28,930 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 10:27:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:29,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:27:29,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:29,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:29,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:29,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911126287] [2021-05-06 10:27:29,093 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:29,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377594955] [2021-05-06 10:27:29,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377594955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:29,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:29,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:27:29,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113651499] [2021-05-06 10:27:29,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:27:29,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:29,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:27:29,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:27:29,095 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:27:29,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:29,152 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-05-06 10:27:29,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:27:29,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 10:27:29,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:29,154 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:27:29,154 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 10:27:29,154 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:27:29,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 10:27:29,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 10:27:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:27:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-05-06 10:27:29,158 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 26 [2021-05-06 10:27:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:29,158 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-05-06 10:27:29,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:27:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-05-06 10:27:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 10:27:29,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:29,159 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 10:27:29,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:29,373 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:29,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1100412105, now seen corresponding path program 1 times [2021-05-06 10:27:29,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:29,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611275344] [2021-05-06 10:27:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:29,388 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:29,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976565130] [2021-05-06 10:27:29,389 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 10:27:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 10:27:29,451 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 10:27:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 10:27:29,467 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 10:27:29,494 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 10:27:29,494 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 10:27:29,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:29,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:27:29 BasicIcfg [2021-05-06 10:27:29,739 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:27:29,739 INFO L168 Benchmark]: Toolchain (without parser) took 2517.65 ms. Allocated memory was 225.4 MB in the beginning and 270.5 MB in the end (delta: 45.1 MB). Free memory was 190.2 MB in the beginning and 234.1 MB in the end (delta: -43.9 MB). Peak memory consumption was 2.2 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:29,739 INFO L168 Benchmark]: CDTParser took 0.08 ms. Allocated memory is still 225.4 MB. Free memory is still 206.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:27:29,740 INFO L168 Benchmark]: CACSL2BoogieTranslator took 202.14 ms. Allocated memory is still 225.4 MB. Free memory was 189.9 MB in the beginning and 207.7 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:29,740 INFO L168 Benchmark]: Boogie Preprocessor took 35.27 ms. Allocated memory is still 225.4 MB. Free memory was 207.7 MB in the beginning and 206.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:29,740 INFO L168 Benchmark]: RCFGBuilder took 251.67 ms. Allocated memory is still 225.4 MB. Free memory was 206.3 MB in the beginning and 192.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:29,740 INFO L168 Benchmark]: IcfgTransformer took 11.77 ms. Allocated memory is still 225.4 MB. Free memory was 192.0 MB in the beginning and 190.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:29,740 INFO L168 Benchmark]: TraceAbstraction took 2010.17 ms. Allocated memory was 225.4 MB in the beginning and 270.5 MB in the end (delta: 45.1 MB). Free memory was 190.3 MB in the beginning and 234.1 MB in the end (delta: -43.8 MB). Peak memory consumption was 2.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:29,741 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08 ms. Allocated memory is still 225.4 MB. Free memory is still 206.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 202.14 ms. Allocated memory is still 225.4 MB. Free memory was 189.9 MB in the beginning and 207.7 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.27 ms. Allocated memory is still 225.4 MB. Free memory was 207.7 MB in the beginning and 206.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 251.67 ms. Allocated memory is still 225.4 MB. Free memory was 206.3 MB in the beginning and 192.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 11.77 ms. Allocated memory is still 225.4 MB. Free memory was 192.0 MB in the beginning and 190.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2010.17 ms. Allocated memory was 225.4 MB in the beginning and 270.5 MB in the end (delta: 45.1 MB). Free memory was 190.3 MB in the beginning and 234.1 MB in the end (delta: -43.8 MB). Peak memory consumption was 2.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=6, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L22] CALL assume_abort_if_not(k <= 256) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L7] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L22] RET assume_abort_if_not(k <= 256) VAL [\old(counter)=0, counter=0, k=2] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=2, x=0, y=0] [L28] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=2, x=0, y=0] [L28] COND TRUE counter++<1 [L29] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L29] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(counter)=0, c=0, counter=1, k=2, x=0, y=0] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=2, x=1, y=1] [L28] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=2, x=1, y=1] [L28] COND FALSE !(counter++<1) [L39] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L39] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(counter)=0, c=1, counter=2, k=2, x=1, y=1] [L40] CALL __VERIFIER_assert(k*y == y*y) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1956.3ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 8.7ms, AutomataDifference: 173.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 106 SDtfs, 23 SDslu, 207 SDs, 0 SdLazy, 80 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 48.0ms SsaConstructionTime, 148.6ms SatisfiabilityAnalysisTime, 345.9ms InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 212 SizeOfPredicates, 3 NumberOfNonLiveVariables, 363 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...