/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/prod4br-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:41:07,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:41:07,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:41:07,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:41:07,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:41:07,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:41:07,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:41:07,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:41:07,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:41:07,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:41:07,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:41:07,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:41:07,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:41:07,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:41:07,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:41:07,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:41:07,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:41:07,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:41:07,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:41:07,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:41:07,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:41:07,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:41:07,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:41:07,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:41:07,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 21:41:07,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 21:41:07,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 21:41:07,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 21:41:07,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 21:41:07,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 21:41:07,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 21:41:07,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 21:41:07,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 21:41:07,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 21:41:07,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 21:41:07,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 21:41:07,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 21:41:07,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 21:41:07,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:41:07,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:41:07,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:41:07,666 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:41:07,682 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:41:07,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:41:07,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:41:07,685 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:41:07,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:41:07,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:41:07,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:41:07,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:41:07,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:41:07,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:41:07,686 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:41:07,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:41:07,687 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:41:07,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:41:07,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:41:07,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:41:07,687 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:41:07,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:41:07,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:41:07,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:41:07,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:41:07,689 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:41:07,689 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:41:08,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:41:08,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:41:08,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:41:08,039 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:41:08,039 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:41:08,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound1.c [2021-05-02 21:41:08,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7068b12d/5fec43e9fbe044f59701ceefa4fbca19/FLAG1cf53d8ca [2021-05-02 21:41:08,536 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:41:08,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound1.c [2021-05-02 21:41:08,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7068b12d/5fec43e9fbe044f59701ceefa4fbca19/FLAG1cf53d8ca [2021-05-02 21:41:08,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7068b12d/5fec43e9fbe044f59701ceefa4fbca19 [2021-05-02 21:41:08,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:41:08,568 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:41:08,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:41:08,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:41:08,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:41:08,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:41:08" (1/1) ... [2021-05-02 21:41:08,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d221b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:08, skipping insertion in model container [2021-05-02 21:41:08,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:41:08" (1/1) ... [2021-05-02 21:41:08,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:41:08,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:41:08,733 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/prod4br-ll_unwindbound1.c[524,537] [2021-05-02 21:41:08,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:41:08,791 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:41:08,834 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/prod4br-ll_unwindbound1.c[524,537] [2021-05-02 21:41:08,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:41:08,868 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:41:08,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:08 WrapperNode [2021-05-02 21:41:08,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:41:08,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:41:08,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:41:08,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:41:08,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:08" (1/1) ... [2021-05-02 21:41:08,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:08" (1/1) ... [2021-05-02 21:41:08,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:08" (1/1) ... [2021-05-02 21:41:08,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:08" (1/1) ... [2021-05-02 21:41:08,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:08" (1/1) ... [2021-05-02 21:41:08,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:08" (1/1) ... [2021-05-02 21:41:08,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:08" (1/1) ... [2021-05-02 21:41:08,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:41:08,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:41:08,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:41:08,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:41:08,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:41:08,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:41:08,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:41:08,989 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:41:08,990 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:41:08,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:41:08,990 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:41:08,990 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:41:08,991 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:41:08,991 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:41:08,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:41:08,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 21:41:08,992 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:41:08,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:41:08,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:41:08,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:41:08,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:41:08,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:41:08,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:41:08,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:41:08,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:41:09,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:41:09,238 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 21:41:09,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:41:09 BoogieIcfgContainer [2021-05-02 21:41:09,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:41:09,240 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:41:09,240 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:41:09,241 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:41:09,243 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:41:09" (1/1) ... [2021-05-02 21:41:09,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:41:09 BasicIcfg [2021-05-02 21:41:09,258 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:41:09,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:41:09,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:41:09,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:41:09,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:41:08" (1/4) ... [2021-05-02 21:41:09,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711e24c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:41:09, skipping insertion in model container [2021-05-02 21:41:09,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:08" (2/4) ... [2021-05-02 21:41:09,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711e24c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:41:09, skipping insertion in model container [2021-05-02 21:41:09,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:41:09" (3/4) ... [2021-05-02 21:41:09,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711e24c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:41:09, skipping insertion in model container [2021-05-02 21:41:09,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:41:09" (4/4) ... [2021-05-02 21:41:09,264 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound1.cJordan [2021-05-02 21:41:09,269 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:41:09,272 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:41:09,286 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:41:09,301 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:41:09,302 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:41:09,302 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:41:09,302 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:41:09,302 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:41:09,302 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:41:09,302 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:41:09,302 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:41:09,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 21:41:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 21:41:09,318 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:09,318 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:41:09,319 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:09,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:09,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1119019339, now seen corresponding path program 1 times [2021-05-02 21:41:09,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:09,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020099475] [2021-05-02 21:41:09,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:09,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:41:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:09,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:41:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:41:09,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:09,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020099475] [2021-05-02 21:41:09,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020099475] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:41:09,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:41:09,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:41:09,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373009869] [2021-05-02 21:41:09,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:41:09,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:09,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:41:09,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:41:09,605 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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) [2021-05-02 21:41:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:09,691 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-05-02 21:41:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:41:09,693 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 [2021-05-02 21:41:09,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:09,699 INFO L225 Difference]: With dead ends: 33 [2021-05-02 21:41:09,700 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 21:41:09,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:41:09,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 21:41:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 21:41:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 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), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:41:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-02 21:41:09,732 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-05-02 21:41:09,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:09,733 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-02 21:41:09,733 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) [2021-05-02 21:41:09,733 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-02 21:41:09,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:41:09,734 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:09,734 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:41:09,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:41:09,735 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:09,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:09,736 INFO L82 PathProgramCache]: Analyzing trace with hash -496973861, now seen corresponding path program 1 times [2021-05-02 21:41:09,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:09,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743587241] [2021-05-02 21:41:09,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:09,772 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:09,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129434104] [2021-05-02 21:41:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:09,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 21:41:09,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:09,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:09,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:09,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:09,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:09,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:41:09,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:09,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743587241] [2021-05-02 21:41:09,989 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:09,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129434104] [2021-05-02 21:41:09,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129434104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:41:09,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:41:09,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 21:41:09,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21156189] [2021-05-02 21:41:09,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 21:41:09,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:09,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 21:41:09,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:41:09,994 INFO L87 Difference]: Start difference. First operand 27 states and 33 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) [2021-05-02 21:41:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:10,008 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-05-02 21:41:10,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 21:41:10,009 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 [2021-05-02 21:41:10,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:10,011 INFO L225 Difference]: With dead ends: 29 [2021-05-02 21:41:10,011 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 21:41:10,012 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:41:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 21:41:10,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 21:41:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:41:10,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 21:41:10,024 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-05-02 21:41:10,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:10,024 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 21:41:10,024 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) [2021-05-02 21:41:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 21:41:10,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:41:10,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:10,031 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:41:10,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:41:10,245 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:10,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:10,246 INFO L82 PathProgramCache]: Analyzing trace with hash -495871594, now seen corresponding path program 1 times [2021-05-02 21:41:10,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:10,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824490603] [2021-05-02 21:41:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:10,266 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:10,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667220099] [2021-05-02 21:41:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:10,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 21:41:10,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:10,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:10,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:41:10,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:10,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824490603] [2021-05-02 21:41:10,416 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:10,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667220099] [2021-05-02 21:41:10,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667220099] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:41:10,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:41:10,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 21:41:10,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424936185] [2021-05-02 21:41:10,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:41:10,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:10,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:41:10,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:41:10,418 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:41:10,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:10,533 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-02 21:41:10,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:41:10,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 18 [2021-05-02 21:41:10,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:10,535 INFO L225 Difference]: With dead ends: 40 [2021-05-02 21:41:10,535 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 21:41:10,536 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:41:10,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 21:41:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-05-02 21:41:10,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:41:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-02 21:41:10,547 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2021-05-02 21:41:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:10,547 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-02 21:41:10,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:41:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-02 21:41:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 21:41:10,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:10,548 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:41:10,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:10,761 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:10,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:10,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1025358414, now seen corresponding path program 1 times [2021-05-02 21:41:10,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:10,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751417412] [2021-05-02 21:41:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:10,779 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:10,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362700906] [2021-05-02 21:41:10,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:10,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:41:10,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:10,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:10,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:10,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:10,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:10,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:11,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:11,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:11,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:11,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:11,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:11,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:11,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:11,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:41:11,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:11,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751417412] [2021-05-02 21:41:11,122 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:11,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362700906] [2021-05-02 21:41:11,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362700906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:41:11,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:41:11,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 21:41:11,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515085134] [2021-05-02 21:41:11,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 21:41:11,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:11,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 21:41:11,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:41:11,123 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:41:11,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:11,597 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-05-02 21:41:11,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 21:41:11,598 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 21:41:11,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:11,602 INFO L225 Difference]: With dead ends: 49 [2021-05-02 21:41:11,602 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 21:41:11,602 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 274.0ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-02 21:41:11,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 21:41:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 21:41:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 21:41:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-02 21:41:11,609 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 24 [2021-05-02 21:41:11,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:11,609 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-02 21:41:11,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:41:11,610 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-02 21:41:11,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 21:41:11,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:11,610 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, 1] [2021-05-02 21:41:11,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:11,832 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:11,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:11,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2117889998, now seen corresponding path program 1 times [2021-05-02 21:41:11,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:11,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970727313] [2021-05-02 21:41:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:11,842 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:11,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668632250] [2021-05-02 21:41:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 21:41:11,906 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 21:41:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 21:41:11,924 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 21:41:11,962 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 21:41:11,962 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 21:41:12,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:12,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:41:12 BasicIcfg [2021-05-02 21:41:12,210 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 21:41:12,211 INFO L168 Benchmark]: Toolchain (without parser) took 3642.57 ms. Allocated memory was 174.1 MB in the beginning and 211.8 MB in the end (delta: 37.7 MB). Free memory was 139.2 MB in the beginning and 140.8 MB in the end (delta: -1.6 MB). Peak memory consumption was 37.0 MB. Max. memory is 8.0 GB. [2021-05-02 21:41:12,211 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 174.1 MB. Free memory is still 155.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 21:41:12,211 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.18 ms. Allocated memory is still 174.1 MB. Free memory was 139.0 MB in the beginning and 156.2 MB in the end (delta: -17.2 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-05-02 21:41:12,211 INFO L168 Benchmark]: Boogie Preprocessor took 44.32 ms. Allocated memory is still 174.1 MB. Free memory was 156.2 MB in the beginning and 155.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 21:41:12,212 INFO L168 Benchmark]: RCFGBuilder took 325.09 ms. Allocated memory is still 174.1 MB. Free memory was 154.6 MB in the beginning and 138.4 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 21:41:12,212 INFO L168 Benchmark]: IcfgTransformer took 17.52 ms. Allocated memory is still 174.1 MB. Free memory was 138.4 MB in the beginning and 136.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 21:41:12,212 INFO L168 Benchmark]: TraceAbstraction took 2951.16 ms. Allocated memory was 174.1 MB in the beginning and 211.8 MB in the end (delta: 37.7 MB). Free memory was 136.8 MB in the beginning and 140.8 MB in the end (delta: -4.0 MB). Peak memory consumption was 34.8 MB. Max. memory is 8.0 GB. [2021-05-02 21:41:12,213 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 is still 155.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 297.18 ms. Allocated memory is still 174.1 MB. Free memory was 139.0 MB in the beginning and 156.2 MB in the end (delta: -17.2 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.32 ms. Allocated memory is still 174.1 MB. Free memory was 156.2 MB in the beginning and 155.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 325.09 ms. Allocated memory is still 174.1 MB. Free memory was 154.6 MB in the beginning and 138.4 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 17.52 ms. Allocated memory is still 174.1 MB. Free memory was 138.4 MB in the beginning and 136.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2951.16 ms. Allocated memory was 174.1 MB in the beginning and 211.8 MB in the end (delta: 37.7 MB). Free memory was 136.8 MB in the beginning and 140.8 MB in the end (delta: -4.0 MB). Peak memory consumption was 34.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=16, counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L26] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=-2147483646, y=2] [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [\old(counter)=0, a=-2147483646, b=2, counter=0, p=1, q=0, x=-2147483646, y=2] [L33] EXPR counter++ VAL [\old(counter)=0, a=-2147483646, b=2, counter=1, counter++=0, p=1, q=0, x=-2147483646, y=2] [L33] COND TRUE counter++<1 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(counter)=0, a=-2147483646, b=2, counter=1, p=1, q=0, x=-2147483646, y=2] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [\old(counter)=0, a=-2147483646, b=2, counter=1, p=1, q=0, x=-2147483646, y=2] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [\old(counter)=0, a=-1073741823, b=1, counter=1, p=4, q=0, x=-2147483646, y=2] [L33] EXPR counter++ VAL [\old(counter)=0, a=-1073741823, b=1, counter=2, counter++=1, p=4, q=0, x=-2147483646, y=2] [L33] COND FALSE !(counter++<1) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2880.1ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 15.6ms, AutomataDifference: 725.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 107 SDtfs, 72 SDslu, 284 SDs, 0 SdLazy, 316 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 393.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 386.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=4, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 49.5ms SsaConstructionTime, 135.2ms SatisfiabilityAnalysisTime, 681.7ms InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 293 SizeOfPredicates, 9 NumberOfNonLiveVariables, 370 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 1/2 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...