/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_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:14:09,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:14:09,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:14:09,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:14:09,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:14:09,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:14:09,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:14:09,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:14:09,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:14:09,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:14:09,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:14:09,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:14:09,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:14:09,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:14:09,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:14:09,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:14:09,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:14:09,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:14:09,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:14:09,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:14:09,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:14:09,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:14:09,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:14:09,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:14:09,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:14:09,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:14:09,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:14:09,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:14:09,398 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:14:09,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:14:09,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:14:09,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:14:09,418 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:14:09,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:14:09,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:14:09,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:14:09,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:14:09,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:14:09,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:14:09,419 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:14:09,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:14:09,420 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:14:09,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:14:09,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:14:09,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:14:09,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:14:09,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:14:09,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:14:09,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:14:09,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:14:09,422 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:14:09,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:14:09,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:14:09,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:14:09,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:14:09,805 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:14:09,807 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:14:09,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound10.c [2021-05-06 10:14:09,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a34a624a/cc6f4967aac64645879d75c4148b1305/FLAG7e49e6e4d [2021-05-06 10:14:10,225 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:14:10,226 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound10.c [2021-05-06 10:14:10,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a34a624a/cc6f4967aac64645879d75c4148b1305/FLAG7e49e6e4d [2021-05-06 10:14:10,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a34a624a/cc6f4967aac64645879d75c4148b1305 [2021-05-06 10:14:10,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:14:10,631 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:14:10,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:14:10,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:14:10,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:14:10,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:14:10" (1/1) ... [2021-05-06 10:14:10,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e61aec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:10, skipping insertion in model container [2021-05-06 10:14:10,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:14:10" (1/1) ... [2021-05-06 10:14:10,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:14:10,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:14:10,770 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_valuebound10.c[454,467] [2021-05-06 10:14:10,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:14:10,786 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:14:10,829 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_valuebound10.c[454,467] [2021-05-06 10:14:10,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:14:10,853 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:14:10,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:10 WrapperNode [2021-05-06 10:14:10,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:14:10,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:14:10,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:14:10,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:14:10,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:10" (1/1) ... [2021-05-06 10:14:10,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:10" (1/1) ... [2021-05-06 10:14:10,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:10" (1/1) ... [2021-05-06 10:14:10,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:10" (1/1) ... [2021-05-06 10:14:10,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:10" (1/1) ... [2021-05-06 10:14:10,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:10" (1/1) ... [2021-05-06 10:14:10,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:10" (1/1) ... [2021-05-06 10:14:10,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:14:10,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:14:10,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:14:10,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:14:10,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:10" (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 10:14:10,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:14:10,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:14:10,951 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:14:10,951 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:14:10,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:14:10,951 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:14:10,951 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:14:10,952 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:14:10,952 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:14:10,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:14:10,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:14:10,952 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:14:10,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:14:10,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:14:10,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:14:10,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:14:10,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:14:10,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:14:10,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:14:10,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:14:11,234 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:14:11,234 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:14:11,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:14:11 BoogieIcfgContainer [2021-05-06 10:14:11,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:14:11,236 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:14:11,236 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:14:11,237 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:14:11,239 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:14:11" (1/1) ... [2021-05-06 10:14:11,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:14:11 BasicIcfg [2021-05-06 10:14:11,267 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:14:11,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:14:11,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:14:11,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:14:11,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:14:10" (1/4) ... [2021-05-06 10:14:11,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e24bd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:14:11, skipping insertion in model container [2021-05-06 10:14:11,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:10" (2/4) ... [2021-05-06 10:14:11,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e24bd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:14:11, skipping insertion in model container [2021-05-06 10:14:11,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:14:11" (3/4) ... [2021-05-06 10:14:11,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e24bd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:14:11, skipping insertion in model container [2021-05-06 10:14:11,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:14:11" (4/4) ... [2021-05-06 10:14:11,288 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound10.cJordan [2021-05-06 10:14:11,292 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:14:11,295 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:14:11,327 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:14:11,360 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:14:11,361 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:14:11,361 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:14:11,361 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:14:11,361 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:14:11,361 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:14:11,361 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:14:11,361 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:14:11,377 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:14:11,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:14:11,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:14:11,384 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:14:11,385 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:14:11,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:14:11,391 INFO L82 PathProgramCache]: Analyzing trace with hash 409333534, now seen corresponding path program 1 times [2021-05-06 10:14:11,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:14:11,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148847263] [2021-05-06 10:14:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:14:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:14:11,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:14:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:14:11,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:14:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:14:11,636 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 10:14:11,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:14:11,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148847263] [2021-05-06 10:14:11,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148847263] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:14:11,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:14:11,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:14:11,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713436142] [2021-05-06 10:14:11,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:14:11,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:14:11,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:14:11,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:14:11,653 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:14:11,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:14:11,702 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-05-06 10:14:11,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:14:11,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:14:11,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:14:11,709 INFO L225 Difference]: With dead ends: 27 [2021-05-06 10:14:11,710 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 10:14:11,711 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:14:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 10:14:11,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-06 10:14:11,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 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 10:14:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-06 10:14:11,739 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-05-06 10:14:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:14:11,739 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-06 10:14:11,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:14:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-06 10:14:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:14:11,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:14:11,740 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:14:11,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:14:11,740 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:14:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:14:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1396244096, now seen corresponding path program 1 times [2021-05-06 10:14:11,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:14:11,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310316849] [2021-05-06 10:14:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:14:11,756 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:14:11,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799864683] [2021-05-06 10:14:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:14:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:14:11,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:14:11,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:14:11,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:14:12,003 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 10:14:12,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:14:12,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310316849] [2021-05-06 10:14:12,004 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:14:12,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799864683] [2021-05-06 10:14:12,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799864683] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:14:12,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:14:12,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:14:12,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299951410] [2021-05-06 10:14:12,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:14:12,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:14:12,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:14:12,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:14:12,007 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:14:12,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:14:12,034 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-05-06 10:14:12,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:14:12,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:14:12,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:14:12,035 INFO L225 Difference]: With dead ends: 30 [2021-05-06 10:14:12,035 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 10:14:12,036 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:14:12,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 10:14:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 10:14:12,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 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 10:14:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-06 10:14:12,041 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2021-05-06 10:14:12,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:14:12,041 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-06 10:14:12,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:14:12,042 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-06 10:14:12,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 10:14:12,042 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:14:12,042 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, 1] [2021-05-06 10:14:12,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:14:12,262 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:14:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:14:12,262 INFO L82 PathProgramCache]: Analyzing trace with hash 279144821, now seen corresponding path program 1 times [2021-05-06 10:14:12,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:14:12,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636721611] [2021-05-06 10:14:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:14:12,279 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:14:12,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678836065] [2021-05-06 10:14:12,280 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 10:14:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:14:12,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:14:12,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:14:12,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:14:12,501 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 10:14:12,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:14:12,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636721611] [2021-05-06 10:14:12,501 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:14:12,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678836065] [2021-05-06 10:14:12,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678836065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:14:12,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:14:12,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:14:12,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212242229] [2021-05-06 10:14:12,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:14:12,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:14:12,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:14:12,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:14:12,503 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:14:12,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:14:12,563 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-05-06 10:14:12,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:14:12,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 10:14:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:14:12,567 INFO L225 Difference]: With dead ends: 37 [2021-05-06 10:14:12,567 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 10:14:12,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:14:12,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 10:14:12,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 10:14:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 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 10:14:12,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-06 10:14:12,575 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2021-05-06 10:14:12,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:14:12,575 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-06 10:14:12,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:14:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-06 10:14:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 10:14:12,576 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:14:12,576 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:14:12,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:14:12,782 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:14:12,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:14:12,782 INFO L82 PathProgramCache]: Analyzing trace with hash -522906656, now seen corresponding path program 2 times [2021-05-06 10:14:12,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:14:12,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950932040] [2021-05-06 10:14:12,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:14:12,802 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:14:12,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445835057] [2021-05-06 10:14:12,802 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 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 10:14:12,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:14:12,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:14:12,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:14:12,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:14:13,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:14:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:14:13,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:14:13,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950932040] [2021-05-06 10:14:13,020 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:14:13,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445835057] [2021-05-06 10:14:13,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445835057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:14:13,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:14:13,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:14:13,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906372588] [2021-05-06 10:14:13,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:14:13,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:14:13,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:14:13,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:14:13,026 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:14:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:14:13,097 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-06 10:14:13,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:14:13,099 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), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-06 10:14:13,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:14:13,100 INFO L225 Difference]: With dead ends: 44 [2021-05-06 10:14:13,100 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:14:13,100 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:14:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:14:13,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:14:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:14:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-06 10:14:13,106 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 31 [2021-05-06 10:14:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:14:13,106 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-06 10:14:13,106 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), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:14:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-06 10:14:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 10:14:13,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:14:13,107 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:14:13,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:14:13,313 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:14:13,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:14:13,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1704072427, now seen corresponding path program 3 times [2021-05-06 10:14:13,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:14:13,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230823310] [2021-05-06 10:14:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:14:13,325 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:14:13,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680496066] [2021-05-06 10:14:13,326 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 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 10:14:13,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:14:13,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:14:13,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:14:13,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:14:13,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:14:13,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:14:13,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:14:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-06 10:14:13,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:14:13,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230823310] [2021-05-06 10:14:13,523 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:14:13,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680496066] [2021-05-06 10:14:13,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680496066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:14:13,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:14:13,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:14:13,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000327065] [2021-05-06 10:14:13,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:14:13,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:14:13,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:14:13,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:14:13,525 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:14:13,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:14:13,558 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-05-06 10:14:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:14:13,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-05-06 10:14:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:14:13,559 INFO L225 Difference]: With dead ends: 41 [2021-05-06 10:14:13,560 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 10:14:13,560 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:14:13,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 10:14:13,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 10:14:13,560 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 10:14:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 10:14:13,561 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2021-05-06 10:14:13,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:14:13,561 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 10:14:13,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:14:13,561 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 10:14:13,561 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 10:14:13,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:14:13,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:14:13 BasicIcfg [2021-05-06 10:14:13,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:14:13,789 INFO L168 Benchmark]: Toolchain (without parser) took 3157.72 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 160.3 MB in the beginning and 176.9 MB in the end (delta: -16.6 MB). Peak memory consumption was 23.4 MB. Max. memory is 8.0 GB. [2021-05-06 10:14:13,789 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 195.0 MB. Free memory is still 176.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:14:13,789 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.26 ms. Allocated memory is still 195.0 MB. Free memory was 160.1 MB in the beginning and 178.0 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-06 10:14:13,789 INFO L168 Benchmark]: Boogie Preprocessor took 23.58 ms. Allocated memory is still 195.0 MB. Free memory was 178.0 MB in the beginning and 176.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:14:13,790 INFO L168 Benchmark]: RCFGBuilder took 356.92 ms. Allocated memory is still 195.0 MB. Free memory was 176.4 MB in the beginning and 162.4 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 10:14:13,790 INFO L168 Benchmark]: IcfgTransformer took 31.58 ms. Allocated memory is still 195.0 MB. Free memory was 162.4 MB in the beginning and 161.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:14:13,790 INFO L168 Benchmark]: TraceAbstraction took 2506.20 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 161.0 MB in the beginning and 176.9 MB in the end (delta: -15.8 MB). Peak memory consumption was 25.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:14:13,790 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 195.0 MB. Free memory is still 176.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 219.26 ms. Allocated memory is still 195.0 MB. Free memory was 160.1 MB in the beginning and 178.0 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.58 ms. Allocated memory is still 195.0 MB. Free memory was 178.0 MB in the beginning and 176.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 356.92 ms. Allocated memory is still 195.0 MB. Free memory was 176.4 MB in the beginning and 162.4 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 31.58 ms. Allocated memory is still 195.0 MB. Free memory was 162.4 MB in the beginning and 161.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2506.20 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 161.0 MB in the beginning and 176.9 MB in the end (delta: -15.8 MB). Peak memory consumption was 25.1 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 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2426.8ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 16.3ms, AutomataDifference: 277.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 107 SDtfs, 42 SDslu, 302 SDs, 0 SdLazy, 121 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 113.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 181.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=4, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 33.6ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 49.1ms SsaConstructionTime, 148.3ms SatisfiabilityAnalysisTime, 718.2ms InterpolantComputationTime, 127 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 298 SizeOfPredicates, 5 NumberOfNonLiveVariables, 476 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 42/52 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...