/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/ps2-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:13:34,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:13:34,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:13:34,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:13:34,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:13:34,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:13:34,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:13:34,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:13:34,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:13:34,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:13:34,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:13:34,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:13:34,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:13:34,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:13:34,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:13:34,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:13:34,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:13:34,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:13:34,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:13:34,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:13:34,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:13:34,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:13:34,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:13:34,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:13:34,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:13:34,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 10:13:34,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 10:13:34,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 10:13:34,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 10:13:34,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 10:13:34,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 10:13:34,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 10:13:34,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 10:13:34,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:13:34,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:13:34,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:13:34,664 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:13:34,679 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:13:34,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:13:34,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:13:34,683 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:13:34,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:13:34,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:13:34,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:13:34,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:13:34,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:13:34,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:13:34,685 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:13:34,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:13:34,685 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:13:34,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:13:34,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:13:34,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:13:34,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:13:34,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:13:34,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:13:34,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:13:34,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:13:34,687 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:13:34,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:13:35,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:13:35,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:13:35,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:13:35,035 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:13:35,036 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:13:35,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound2.c [2021-05-06 10:13:35,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b789cd260/18fb6b8b0e924d7db44c7b42183d9121/FLAGed4bef212 [2021-05-06 10:13:35,469 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:13:35,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound2.c [2021-05-06 10:13:35,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b789cd260/18fb6b8b0e924d7db44c7b42183d9121/FLAGed4bef212 [2021-05-06 10:13:35,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b789cd260/18fb6b8b0e924d7db44c7b42183d9121 [2021-05-06 10:13:35,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:13:35,500 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:13:35,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:13:35,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:13:35,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:13:35,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:13:35" (1/1) ... [2021-05-06 10:13:35,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@435cdd68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:35, skipping insertion in model container [2021-05-06 10:13:35,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:13:35" (1/1) ... [2021-05-06 10:13:35,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:13:35,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:13:35,632 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/ps2-ll_unwindbound2.c[454,467] [2021-05-06 10:13:35,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:13:35,648 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:13:35,691 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/ps2-ll_unwindbound2.c[454,467] [2021-05-06 10:13:35,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:13:35,715 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:13:35,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:35 WrapperNode [2021-05-06 10:13:35,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:13:35,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:13:35,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:13:35,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:13:35,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:35" (1/1) ... [2021-05-06 10:13:35,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:35" (1/1) ... [2021-05-06 10:13:35,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:35" (1/1) ... [2021-05-06 10:13:35,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:35" (1/1) ... [2021-05-06 10:13:35,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:35" (1/1) ... [2021-05-06 10:13:35,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:35" (1/1) ... [2021-05-06 10:13:35,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:35" (1/1) ... [2021-05-06 10:13:35,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:13:35,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:13:35,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:13:35,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:13:35,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:35" (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 10:13:35,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:13:35,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:13:35,836 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:13:35,836 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:13:35,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:13:35,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:13:35,836 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:13:35,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:13:35,836 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:13:35,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:13:35,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:13:35,837 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:13:35,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:13:35,838 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:13:35,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:13:35,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:13:35,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:13:35,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:13:35,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:13:35,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:13:36,147 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:13:36,147 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:13:36,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:13:36 BoogieIcfgContainer [2021-05-06 10:13:36,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:13:36,149 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:13:36,149 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:13:36,150 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:13:36,152 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:13:36" (1/1) ... [2021-05-06 10:13:36,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:13:36 BasicIcfg [2021-05-06 10:13:36,184 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:13:36,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:13:36,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:13:36,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:13:36,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:13:35" (1/4) ... [2021-05-06 10:13:36,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69085a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:13:36, skipping insertion in model container [2021-05-06 10:13:36,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:35" (2/4) ... [2021-05-06 10:13:36,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69085a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:13:36, skipping insertion in model container [2021-05-06 10:13:36,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:13:36" (3/4) ... [2021-05-06 10:13:36,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69085a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:13:36, skipping insertion in model container [2021-05-06 10:13:36,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:13:36" (4/4) ... [2021-05-06 10:13:36,190 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound2.cJordan [2021-05-06 10:13:36,198 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:13:36,203 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:13:36,218 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:13:36,241 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:13:36,241 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:13:36,241 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:13:36,241 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:13:36,241 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:13:36,241 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:13:36,241 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:13:36,241 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:13:36,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:13:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 10:13:36,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:13:36,265 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:13:36,266 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:13:36,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:13:36,271 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-06 10:13:36,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:13:36,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113952026] [2021-05-06 10:13:36,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:13:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:13:36,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:13:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:13:36,563 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 10:13:36,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:13:36,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113952026] [2021-05-06 10:13:36,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113952026] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:13:36,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:13:36,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:13:36,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176180689] [2021-05-06 10:13:36,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:13:36,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:13:36,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:13:36,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:13:36,585 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:13:36,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:13:36,661 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-06 10:13:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:13:36,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 10:13:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:13:36,671 INFO L225 Difference]: With dead ends: 23 [2021-05-06 10:13:36,671 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 10:13:36,672 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:13:36,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 10:13:36,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-06 10:13:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:13:36,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 10:13:36,700 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 10:13:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:13:36,701 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 10:13:36,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:13:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 10:13:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 10:13:36,703 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:13:36,703 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:13:36,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:13:36,703 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:13:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:13:36,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-06 10:13:36,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:13:36,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504567342] [2021-05-06 10:13:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:13:36,725 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:13:36,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997308199] [2021-05-06 10:13:36,725 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 10:13:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:13:36,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:13:36,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:13:36,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:36,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:36,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:36,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:36,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:36,972 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 10:13:36,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:13:36,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504567342] [2021-05-06 10:13:36,973 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:13:36,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997308199] [2021-05-06 10:13:36,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997308199] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:13:36,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:13:36,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:13:36,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929516864] [2021-05-06 10:13:36,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:13:36,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:13:36,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:13:36,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:13:36,978 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:13:36,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:13:36,989 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-06 10:13:36,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:13:36,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 10:13:36,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:13:36,991 INFO L225 Difference]: With dead ends: 19 [2021-05-06 10:13:36,991 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 10:13:36,992 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:13:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 10:13:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 10:13:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:13:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 10:13:36,995 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 10:13:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:13:36,996 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 10:13:36,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:13:36,996 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 10:13:36,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 10:13:36,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:13:37,000 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:13:37,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:13:37,225 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:13:37,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:13:37,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-06 10:13:37,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:13:37,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290370876] [2021-05-06 10:13:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:13:37,242 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:13:37,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356212948] [2021-05-06 10:13:37,242 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 10:13:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:13:37,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:13:37,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:13:37,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:37,397 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 10:13:37,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:13:37,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290370876] [2021-05-06 10:13:37,398 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:13:37,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356212948] [2021-05-06 10:13:37,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356212948] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:13:37,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:13:37,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:13:37,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564125590] [2021-05-06 10:13:37,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:13:37,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:13:37,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:13:37,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:13:37,400 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:13:37,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:13:37,448 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 10:13:37,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:13:37,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 10:13:37,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:13:37,449 INFO L225 Difference]: With dead ends: 26 [2021-05-06 10:13:37,450 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 10:13:37,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:13:37,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 10:13:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 10:13:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:13:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 10:13:37,454 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 10:13:37,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:13:37,454 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 10:13:37,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:13:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 10:13:37,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 10:13:37,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:13:37,455 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:13:37,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:13:37,677 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:13:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:13:37,677 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-06 10:13:37,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:13:37,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565195634] [2021-05-06 10:13:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:13:37,699 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:13:37,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274525109] [2021-05-06 10:13:37,699 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 10:13:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:13:37,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:13:37,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:13:37,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:37,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:37,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:37,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:37,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:37,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:37,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:37,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:37,875 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 10:13:37,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:13:37,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565195634] [2021-05-06 10:13:37,876 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:13:37,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274525109] [2021-05-06 10:13:37,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274525109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:13:37,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:13:37,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:13:37,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185399863] [2021-05-06 10:13:37,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:13:37,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:13:37,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:13:37,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:13:37,879 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:13:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:13:37,918 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-06 10:13:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:13:37,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 10:13:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:13:37,920 INFO L225 Difference]: With dead ends: 27 [2021-05-06 10:13:37,921 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 10:13:37,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:13:37,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 10:13:37,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 10:13:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:13:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 10:13:37,934 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 10:13:37,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:13:37,934 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 10:13:37,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:13:37,935 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 10:13:37,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 10:13:37,935 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:13:37,936 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:13:38,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:13:38,145 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:13:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:13:38,146 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-06 10:13:38,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:13:38,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145311130] [2021-05-06 10:13:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:13:38,163 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:13:38,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571745103] [2021-05-06 10:13:38,163 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 10:13:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:13:38,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:13:38,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:13:38,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:13:38,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:13:38,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145311130] [2021-05-06 10:13:38,309 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:13:38,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571745103] [2021-05-06 10:13:38,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571745103] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:13:38,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:13:38,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:13:38,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281237070] [2021-05-06 10:13:38,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:13:38,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:13:38,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:13:38,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:13:38,311 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:13:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:13:38,349 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 10:13:38,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:13:38,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 10:13:38,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:13:38,350 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:13:38,350 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 10:13:38,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:13:38,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 10:13:38,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 10:13:38,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:13:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 10:13:38,354 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 10:13:38,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:13:38,355 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 10:13:38,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:13:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 10:13:38,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:13:38,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:13:38,356 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:13:38,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:13:38,569 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:13:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:13:38,569 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-06 10:13:38,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:13:38,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878973983] [2021-05-06 10:13:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:13:38,578 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:13:38,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124133388] [2021-05-06 10:13:38,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:13:38,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:13:38,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:13:38,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:13:38,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:13:38,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:13:38,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:13:38,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878973983] [2021-05-06 10:13:38,730 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:13:38,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124133388] [2021-05-06 10:13:38,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124133388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:13:38,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:13:38,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:13:38,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421755725] [2021-05-06 10:13:38,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:13:38,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:13:38,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:13:38,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:13:38,732 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:13:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:13:38,790 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-06 10:13:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:13:38,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 10:13:38,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:13:38,792 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:13:38,793 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 10:13:38,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:13:38,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 10:13:38,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 10:13:38,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:13:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 10:13:38,806 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 10:13:38,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:13:38,807 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 10:13:38,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:13:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 10:13:38,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 10:13:38,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:13:38,809 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:13:39,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 10:13:39,029 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:13:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:13:39,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-06 10:13:39,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:13:39,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179102810] [2021-05-06 10:13:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:13:39,038 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:13:39,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330262516] [2021-05-06 10:13:39,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:13:39,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:13:39,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:13:39,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:13:39,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:13:39,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:39,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:39,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 10:13:39,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:13:39,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179102810] [2021-05-06 10:13:39,205 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:13:39,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330262516] [2021-05-06 10:13:39,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330262516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:13:39,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:13:39,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:13:39,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792613074] [2021-05-06 10:13:39,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:13:39,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:13:39,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:13:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:13:39,207 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:13:39,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:13:39,230 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-05-06 10:13:39,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:13:39,238 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-06 10:13:39,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:13:39,239 INFO L225 Difference]: With dead ends: 39 [2021-05-06 10:13:39,239 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 10:13:39,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:13:39,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 10:13:39,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 10:13:39,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 10:13:39,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 10:13:39,240 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-06 10:13:39,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:13:39,240 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 10:13:39,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:13:39,241 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 10:13:39,241 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 10:13:39,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:13:39,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:13:39 BasicIcfg [2021-05-06 10:13:39,445 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:13:39,446 INFO L168 Benchmark]: Toolchain (without parser) took 3946.34 ms. Allocated memory was 255.9 MB in the beginning and 329.3 MB in the end (delta: 73.4 MB). Free memory was 220.9 MB in the beginning and 220.8 MB in the end (delta: 72.3 kB). Peak memory consumption was 73.8 MB. Max. memory is 8.0 GB. [2021-05-06 10:13:39,446 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:13:39,446 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.39 ms. Allocated memory is still 255.9 MB. Free memory was 220.7 MB in the beginning and 238.7 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-06 10:13:39,446 INFO L168 Benchmark]: Boogie Preprocessor took 36.61 ms. Allocated memory is still 255.9 MB. Free memory was 238.7 MB in the beginning and 237.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:13:39,446 INFO L168 Benchmark]: RCFGBuilder took 391.47 ms. Allocated memory is still 255.9 MB. Free memory was 237.3 MB in the beginning and 223.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:13:39,446 INFO L168 Benchmark]: IcfgTransformer took 34.59 ms. Allocated memory is still 255.9 MB. Free memory was 223.0 MB in the beginning and 221.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:13:39,446 INFO L168 Benchmark]: TraceAbstraction took 3260.44 ms. Allocated memory was 255.9 MB in the beginning and 329.3 MB in the end (delta: 73.4 MB). Free memory was 221.6 MB in the beginning and 220.8 MB in the end (delta: 798.9 kB). Peak memory consumption was 76.8 MB. Max. memory is 8.0 GB. [2021-05-06 10:13:39,447 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 216.39 ms. Allocated memory is still 255.9 MB. Free memory was 220.7 MB in the beginning and 238.7 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.61 ms. Allocated memory is still 255.9 MB. Free memory was 238.7 MB in the beginning and 237.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 391.47 ms. Allocated memory is still 255.9 MB. Free memory was 237.3 MB in the beginning and 223.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 34.59 ms. Allocated memory is still 255.9 MB. Free memory was 223.0 MB in the beginning and 221.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 8.0 GB. * TraceAbstraction took 3260.44 ms. Allocated memory was 255.9 MB in the beginning and 329.3 MB in the end (delta: 73.4 MB). Free memory was 221.6 MB in the beginning and 220.8 MB in the end (delta: 798.9 kB). Peak memory consumption was 76.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3203.6ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 16.1ms, AutomataDifference: 346.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 127 SDtfs, 37 SDslu, 321 SDs, 0 SdLazy, 138 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 162.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 239.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=6, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 52.8ms AutomataMinimizationTime, 7 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 70.8ms SsaConstructionTime, 190.1ms SatisfiabilityAnalysisTime, 842.3ms InterpolantComputationTime, 139 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 132 ConstructedInterpolants, 0 QuantifiedInterpolants, 399 SizeOfPredicates, 8 NumberOfNonLiveVariables, 735 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 47/61 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...