/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/mannadiv_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:39:57,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:39:57,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:39:57,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:39:57,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:39:57,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:39:57,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:39:57,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:39:57,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:39:57,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:39:57,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:39:57,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:39:57,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:39:57,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:39:57,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:39:57,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:39:57,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:39:57,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:39:57,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:39:57,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:39:57,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:39:57,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:39:57,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:39:57,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:39:57,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:39:57,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:39:57,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:39:57,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:39:57,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:39:57,660 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:39:57,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:39:57,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:39:57,663 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:39:57,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:39:57,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:39:57,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:39:57,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:39:57,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:39:57,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:39:57,665 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:39:57,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:39:57,665 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:39:57,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:39:57,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:39:57,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:39:57,666 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:39:57,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:39:57,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:39:57,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:39:57,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:39:57,667 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:39:57,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:39:57,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:39:57,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:39:57,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:39:57,987 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:39:57,989 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:39:57,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound2.c [2021-05-02 21:39:58,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf8b89309/3053abd82a6e4478bec1b31b9a90aba1/FLAG6692ceade [2021-05-02 21:39:58,493 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:39:58,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound2.c [2021-05-02 21:39:58,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf8b89309/3053abd82a6e4478bec1b31b9a90aba1/FLAG6692ceade [2021-05-02 21:39:58,517 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf8b89309/3053abd82a6e4478bec1b31b9a90aba1 [2021-05-02 21:39:58,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:39:58,522 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:39:58,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:39:58,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:39:58,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:39:58,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:39:58" (1/1) ... [2021-05-02 21:39:58,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28663251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:39:58, skipping insertion in model container [2021-05-02 21:39:58,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:39:58" (1/1) ... [2021-05-02 21:39:58,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:39:58,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:39:58,692 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/mannadiv_unwindbound2.c[573,586] [2021-05-02 21:39:58,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:39:58,713 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:39:58,724 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/mannadiv_unwindbound2.c[573,586] [2021-05-02 21:39:58,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:39:58,748 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:39:58,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:39:58 WrapperNode [2021-05-02 21:39:58,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:39:58,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:39:58,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:39:58,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:39:58,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:39:58" (1/1) ... [2021-05-02 21:39:58,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:39:58" (1/1) ... [2021-05-02 21:39:58,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:39:58" (1/1) ... [2021-05-02 21:39:58,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:39:58" (1/1) ... [2021-05-02 21:39:58,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:39:58" (1/1) ... [2021-05-02 21:39:58,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:39:58" (1/1) ... [2021-05-02 21:39:58,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:39:58" (1/1) ... [2021-05-02 21:39:58,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:39:58,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:39:58,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:39:58,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:39:58,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:39:58" (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 21:39:58,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:39:58,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:39:58,900 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:39:58,900 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:39:58,900 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:39:58,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:39:58,900 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:39:58,901 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:39:58,901 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:39:58,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:39:58,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 21:39:58,902 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:39:58,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:39:58,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:39:58,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:39:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:39:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:39:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:39:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:39:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:39:59,168 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:39:59,175 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 21:39:59,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:39:59 BoogieIcfgContainer [2021-05-02 21:39:59,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:39:59,182 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:39:59,182 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:39:59,183 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:39:59,185 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:39:59" (1/1) ... [2021-05-02 21:39:59,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:39:59 BasicIcfg [2021-05-02 21:39:59,216 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:39:59,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:39:59,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:39:59,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:39:59,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:39:58" (1/4) ... [2021-05-02 21:39:59,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130cbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:39:59, skipping insertion in model container [2021-05-02 21:39:59,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:39:58" (2/4) ... [2021-05-02 21:39:59,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130cbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:39:59, skipping insertion in model container [2021-05-02 21:39:59,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:39:59" (3/4) ... [2021-05-02 21:39:59,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130cbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:39:59, skipping insertion in model container [2021-05-02 21:39:59,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:39:59" (4/4) ... [2021-05-02 21:39:59,222 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound2.cJordan [2021-05-02 21:39:59,229 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:39:59,233 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:39:59,246 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:39:59,270 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:39:59,270 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:39:59,270 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:39:59,270 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:39:59,270 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:39:59,270 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:39:59,270 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:39:59,271 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:39:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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 21:39:59,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 21:39:59,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:39:59,292 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:39:59,292 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:39:59,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:39:59,297 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-02 21:39:59,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:39:59,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009026070] [2021-05-02 21:39:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:39:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:39:59,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:39:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:39:59,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:39:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:39:59,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 21:39:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:39:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:39:59,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:39:59,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009026070] [2021-05-02 21:39:59,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009026070] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:39:59,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:39:59,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:39:59,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711014219] [2021-05-02 21:39:59,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:39:59,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:39:59,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:39:59,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:39:59,609 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:39:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:39:59,693 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-05-02 21:39:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:39:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 21:39:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:39:59,701 INFO L225 Difference]: With dead ends: 31 [2021-05-02 21:39:59,701 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 21:39:59,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:39:59,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 21:39:59,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 21:39:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:39:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 21:39:59,733 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 21:39:59,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:39:59,734 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 21:39:59,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:39:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 21:39:59,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 21:39:59,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:39:59,736 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:39:59,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:39:59,737 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:39:59,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:39:59,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-02 21:39:59,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:39:59,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167890292] [2021-05-02 21:39:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:39:59,769 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:39:59,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520638278] [2021-05-02 21:39:59,770 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 21:39:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:39:59,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 21:39:59,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:39:59,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:39:59,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:39:59,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:39:59,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:39:59,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:39:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:39:59,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:39:59,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167890292] [2021-05-02 21:39:59,956 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:39:59,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520638278] [2021-05-02 21:39:59,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520638278] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:39:59,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:39:59,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 21:39:59,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097573980] [2021-05-02 21:39:59,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 21:39:59,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:39:59,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 21:39:59,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:39:59,959 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:39:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:39:59,968 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-02 21:39:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 21:39:59,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 21:39:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:39:59,969 INFO L225 Difference]: With dead ends: 27 [2021-05-02 21:39:59,969 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 21:39:59,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:39:59,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 21:39:59,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 21:39:59,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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 21:39:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 21:39:59,974 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 21:39:59,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:39:59,975 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 21:39:59,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:39:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 21:39:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 21:39:59,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:39:59,976 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:00,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:40:00,194 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:00,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:00,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-02 21:40:00,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:00,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897357994] [2021-05-02 21:40:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:00,210 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:00,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039093260] [2021-05-02 21:40:00,210 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 21:40:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:40:00,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 21:40:00,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:00,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:00,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:00,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:00,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 21:40:00,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:00,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897357994] [2021-05-02 21:40:00,397 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:00,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039093260] [2021-05-02 21:40:00,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039093260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:00,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:00,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:40:00,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312672188] [2021-05-02 21:40:00,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:40:00,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:00,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:40:00,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:40:00,399 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:40:00,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:00,514 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-02 21:40:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:40:00,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 21:40:00,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:00,516 INFO L225 Difference]: With dead ends: 35 [2021-05-02 21:40:00,516 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 21:40:00,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:40:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 21:40:00,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 21:40:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 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 21:40:00,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 21:40:00,521 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 21:40:00,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:00,521 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 21:40:00,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:40:00,522 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 21:40:00,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 21:40:00,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:00,523 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:00,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:00,744 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:00,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:00,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-02 21:40:00,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:00,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901134915] [2021-05-02 21:40:00,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:00,755 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:00,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354182310] [2021-05-02 21:40:00,756 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 21:40:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:40:00,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:40:00,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:00,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:00,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:00,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:00,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:01,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:01,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 21:40:01,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:01,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901134915] [2021-05-02 21:40:01,058 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:01,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354182310] [2021-05-02 21:40:01,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354182310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:01,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:01,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 21:40:01,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106736998] [2021-05-02 21:40:01,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 21:40:01,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:01,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 21:40:01,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:40:01,063 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:40:01,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:01,225 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-05-02 21:40:01,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 21:40:01,225 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-05-02 21:40:01,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:01,228 INFO L225 Difference]: With dead ends: 37 [2021-05-02 21:40:01,229 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 21:40:01,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 21:40:01,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 21:40:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-05-02 21:40:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 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 21:40:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-02 21:40:01,242 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-02 21:40:01,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:01,242 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-02 21:40:01,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:40:01,242 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-02 21:40:01,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 21:40:01,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:01,243 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:01,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:01,457 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:01,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-02 21:40:01,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:01,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860169034] [2021-05-02 21:40:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:01,467 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:01,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032318164] [2021-05-02 21:40:01,467 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 21:40:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:40:01,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 21:40:01,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:01,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:01,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:01,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:01,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:01,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:01,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:01,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:01,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:01,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:01,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860169034] [2021-05-02 21:40:01,596 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:01,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032318164] [2021-05-02 21:40:01,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032318164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:01,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:01,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 21:40:01,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746862905] [2021-05-02 21:40:01,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 21:40:01,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:01,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 21:40:01,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 21:40:01,598 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:40:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:01,630 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-05-02 21:40:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 21:40:01,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 21:40:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:01,631 INFO L225 Difference]: With dead ends: 38 [2021-05-02 21:40:01,631 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 21:40:01,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:40:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 21:40:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 21:40:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:40:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-02 21:40:01,635 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-02 21:40:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:01,635 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-02 21:40:01,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:40:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-02 21:40:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 21:40:01,636 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:01,636 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:01,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:01,841 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:01,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1377493560, now seen corresponding path program 2 times [2021-05-02 21:40:01,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:01,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114284997] [2021-05-02 21:40:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:01,848 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:01,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680993191] [2021-05-02 21:40:01,849 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 [2021-05-02 21:40:01,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:40:01,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 21:40:01,911 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 21:40:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 21:40:01,934 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 21:40:02,015 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 21:40:02,015 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 21:40:02,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 21:40:02,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:40:02 BasicIcfg [2021-05-02 21:40:02,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 21:40:02,268 INFO L168 Benchmark]: Toolchain (without parser) took 3745.94 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 144.9 MB in the beginning and 98.1 MB in the end (delta: 46.7 MB). Peak memory consumption was 84.4 MB. Max. memory is 8.0 GB. [2021-05-02 21:40:02,269 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 179.3 MB. Free memory is still 161.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 21:40:02,269 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.64 ms. Allocated memory is still 179.3 MB. Free memory was 144.6 MB in the beginning and 135.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 21:40:02,269 INFO L168 Benchmark]: Boogie Preprocessor took 75.89 ms. Allocated memory is still 179.3 MB. Free memory was 134.8 MB in the beginning and 163.0 MB in the end (delta: -28.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-02 21:40:02,269 INFO L168 Benchmark]: RCFGBuilder took 353.43 ms. Allocated memory is still 179.3 MB. Free memory was 163.0 MB in the beginning and 148.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 21:40:02,269 INFO L168 Benchmark]: IcfgTransformer took 34.32 ms. Allocated memory is still 179.3 MB. Free memory was 148.3 MB in the beginning and 146.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 21:40:02,269 INFO L168 Benchmark]: TraceAbstraction took 3050.53 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 146.2 MB in the beginning and 98.1 MB in the end (delta: 48.1 MB). Peak memory consumption was 84.3 MB. Max. memory is 8.0 GB. [2021-05-02 21:40:02,270 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 179.3 MB. Free memory is still 161.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 222.64 ms. Allocated memory is still 179.3 MB. Free memory was 144.6 MB in the beginning and 135.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.89 ms. Allocated memory is still 179.3 MB. Free memory was 134.8 MB in the beginning and 163.0 MB in the end (delta: -28.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 353.43 ms. Allocated memory is still 179.3 MB. Free memory was 163.0 MB in the beginning and 148.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 34.32 ms. Allocated memory is still 179.3 MB. Free memory was 148.3 MB in the beginning and 146.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3050.53 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 146.2 MB in the beginning and 98.1 MB in the end (delta: 48.1 MB). Peak memory consumption was 84.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=10, counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L29] RET assume_abort_if_not(x1 >= 0) VAL [\old(counter)=0, counter=0, x1=3, x2=1] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L30] RET assume_abort_if_not(x2 != 0) VAL [\old(counter)=0, counter=0, x1=3, x2=1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [\old(counter)=0, counter=0, x1=3, x2=1, y1=0, y2=0, y3=3] [L36] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, x1=3, x2=1, y1=0, y2=0, y3=3] [L36] COND TRUE counter++<2 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=1, x1=3, x2=1, y1=0, y2=0, y3=3] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=1, x1=3, x2=1, y1=0, y2=0, y3=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=1, x1=3, x2=1, y1=1, y2=0, y3=2] [L36] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, x1=3, x2=1, y1=1, y2=0, y3=2] [L36] COND TRUE counter++<2 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=2, x1=3, x2=1, y1=1, y2=0, y3=2] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=2, x1=3, x2=1, y1=1, y2=0, y3=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=2, x1=3, x2=1, y1=2, y2=0, y3=1] [L36] EXPR counter++ VAL [\old(counter)=0, counter=3, counter++=2, x1=3, x2=1, y1=2, y2=0, y3=1] [L36] COND FALSE !(counter++<2) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L18] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2948.6ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 15.5ms, AutomataDifference: 448.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 120 SDtfs, 56 SDslu, 305 SDs, 0 SdLazy, 218 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 212.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 293.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=5, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 43.6ms AutomataMinimizationTime, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 71.4ms SsaConstructionTime, 156.0ms SatisfiabilityAnalysisTime, 716.9ms InterpolantComputationTime, 170 NumberOfCodeBlocks, 170 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 361 SizeOfPredicates, 9 NumberOfNonLiveVariables, 542 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 17/26 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...