/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:53:08,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:53:08,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:53:08,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 09:53:08,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 09:53:08,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 09:53:08,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 09:53:08,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 09:53:08,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 09:53:08,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 09:53:08,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 09:53:08,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 09:53:08,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:53:08,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:53:08,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:53:08,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:53:08,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:53:08,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:53:08,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:53:08,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:53:08,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:53:08,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:53:08,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:53:08,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:53:08,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:53:08,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:53:08,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:53:08,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:53:08,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:53:08,488 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:53:08,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:53:08,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:53:08,490 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:53:08,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:53:08,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:53:08,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:53:08,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:53:08,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:53:08,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:53:08,491 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:53:08,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:53:08,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:53:08,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:53:08,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:53:08,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:53:08,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:53:08,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:53:08,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:53:08,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:53:08,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:53:08,493 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:53:08,493 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:53:08,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:53:08,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:53:08,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:53:08,811 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:53:08,811 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:53:08,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound1.c [2021-05-06 09:53:08,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aec50dec/7e9daf0c1c2d458eb5ec4eeb39eff9dc/FLAGf1302b457 [2021-05-06 09:53:09,246 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:53:09,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound1.c [2021-05-06 09:53:09,256 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aec50dec/7e9daf0c1c2d458eb5ec4eeb39eff9dc/FLAGf1302b457 [2021-05-06 09:53:09,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aec50dec/7e9daf0c1c2d458eb5ec4eeb39eff9dc [2021-05-06 09:53:09,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:53:09,276 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:53:09,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:53:09,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:53:09,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:53:09,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:53:09" (1/1) ... [2021-05-06 09:53:09,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@370c1dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:09, skipping insertion in model container [2021-05-06 09:53:09,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:53:09" (1/1) ... [2021-05-06 09:53:09,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:53:09,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:53:09,426 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound1.c[524,537] [2021-05-06 09:53:09,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:53:09,459 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:53:09,477 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound1.c[524,537] [2021-05-06 09:53:09,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:53:09,519 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:53:09,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:09 WrapperNode [2021-05-06 09:53:09,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:53:09,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:53:09,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:53:09,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:53:09,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:09" (1/1) ... [2021-05-06 09:53:09,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:09" (1/1) ... [2021-05-06 09:53:09,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:09" (1/1) ... [2021-05-06 09:53:09,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:09" (1/1) ... [2021-05-06 09:53:09,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:09" (1/1) ... [2021-05-06 09:53:09,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:09" (1/1) ... [2021-05-06 09:53:09,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:09" (1/1) ... [2021-05-06 09:53:09,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:53:09,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:53:09,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:53:09,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:53:09,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:09" (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 09:53:09,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:53:09,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:53:09,615 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:53:09,615 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:53:09,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:53:09,615 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:53:09,615 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:53:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:53:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:53:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:53:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:53:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:53:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:53:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:53:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:53:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:53:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:53:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:53:09,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:53:09,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:53:09,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:53:09,929 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 09:53:09,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:53:09 BoogieIcfgContainer [2021-05-06 09:53:09,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:53:09,930 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:53:09,930 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:53:09,931 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:53:09,933 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:53:09" (1/1) ... [2021-05-06 09:53:09,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:53:09 BasicIcfg [2021-05-06 09:53:09,960 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:53:09,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:53:09,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:53:09,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:53:09,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:53:09" (1/4) ... [2021-05-06 09:53:09,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c8c55f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:53:09, skipping insertion in model container [2021-05-06 09:53:09,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:09" (2/4) ... [2021-05-06 09:53:09,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c8c55f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:53:09, skipping insertion in model container [2021-05-06 09:53:09,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:53:09" (3/4) ... [2021-05-06 09:53:09,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c8c55f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:53:09, skipping insertion in model container [2021-05-06 09:53:09,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:53:09" (4/4) ... [2021-05-06 09:53:09,965 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound1.cJordan [2021-05-06 09:53:09,985 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:53:09,988 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:53:10,012 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:53:10,035 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:53:10,036 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:53:10,036 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:53:10,036 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:53:10,036 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:53:10,036 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:53:10,036 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:53:10,036 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:53:10,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:53:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:53:10,051 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:10,051 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 09:53:10,052 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:10,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:10,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1119019339, now seen corresponding path program 1 times [2021-05-06 09:53:10,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:10,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829722112] [2021-05-06 09:53:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:10,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:53:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:10,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:53:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:10,321 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 09:53:10,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:10,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829722112] [2021-05-06 09:53:10,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829722112] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:10,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:10,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:53:10,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420668098] [2021-05-06 09:53:10,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:53:10,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:10,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:53:10,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:53:10,338 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:53:10,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:10,416 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-05-06 09:53:10,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:53:10,417 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 09:53:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:10,422 INFO L225 Difference]: With dead ends: 33 [2021-05-06 09:53:10,423 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 09:53:10,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:53:10,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 09:53:10,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-06 09:53:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 09:53:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-06 09:53:10,451 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-05-06 09:53:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:10,451 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-06 09:53:10,452 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 09:53:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-06 09:53:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 09:53:10,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:10,453 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:10,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:53:10,453 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:10,454 INFO L82 PathProgramCache]: Analyzing trace with hash -496973861, now seen corresponding path program 1 times [2021-05-06 09:53:10,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:10,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255518345] [2021-05-06 09:53:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:10,486 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:10,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916660306] [2021-05-06 09:53:10,487 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 09:53:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:10,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 09:53:10,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:10,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:10,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:10,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:10,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:10,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:10,681 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 09:53:10,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:10,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255518345] [2021-05-06 09:53:10,684 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:10,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916660306] [2021-05-06 09:53:10,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916660306] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:10,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:10,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 09:53:10,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924009894] [2021-05-06 09:53:10,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 09:53:10,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:10,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 09:53:10,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:53:10,688 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 09:53:10,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:10,703 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-05-06 09:53:10,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 09:53:10,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 09:53:10,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:10,706 INFO L225 Difference]: With dead ends: 29 [2021-05-06 09:53:10,706 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 09:53:10,707 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:53:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 09:53:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 09:53:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 09:53:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 09:53:10,737 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-05-06 09:53:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:10,737 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 09:53:10,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 09:53:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 09:53:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 09:53:10,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:10,738 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:10,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 09:53:10,955 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:10,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:10,959 INFO L82 PathProgramCache]: Analyzing trace with hash -495871594, now seen corresponding path program 1 times [2021-05-06 09:53:10,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:10,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672417268] [2021-05-06 09:53:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:10,968 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:10,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580437426] [2021-05-06 09:53:10,968 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 09:53:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:11,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:53:11,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:11,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,134 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 09:53:11,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:11,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672417268] [2021-05-06 09:53:11,134 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:11,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580437426] [2021-05-06 09:53:11,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580437426] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:11,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:11,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:53:11,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953261969] [2021-05-06 09:53:11,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:53:11,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:11,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:53:11,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:53:11,136 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:53:11,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:11,181 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-06 09:53:11,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:53:11,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 09:53:11,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:11,182 INFO L225 Difference]: With dead ends: 40 [2021-05-06 09:53:11,182 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 09:53:11,182 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:53:11,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 09:53:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-05-06 09:53:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 09:53:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-06 09:53:11,187 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2021-05-06 09:53:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:11,187 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-06 09:53:11,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:53:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-06 09:53:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 09:53:11,188 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:11,188 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:11,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:11,406 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:11,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:11,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1025358414, now seen corresponding path program 1 times [2021-05-06 09:53:11,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:11,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509104881] [2021-05-06 09:53:11,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:11,416 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:11,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323636721] [2021-05-06 09:53:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:11,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 09:53:11,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:11,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:11,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:11,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509104881] [2021-05-06 09:53:11,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:11,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323636721] [2021-05-06 09:53:11,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323636721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:11,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:11,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 09:53:11,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265365307] [2021-05-06 09:53:11,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 09:53:11,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:11,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 09:53:11,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:53:11,709 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:12,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:12,057 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-05-06 09:53:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 09:53:12,057 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 09:53:12,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:12,059 INFO L225 Difference]: With dead ends: 49 [2021-05-06 09:53:12,059 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 09:53:12,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-06 09:53:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 09:53:12,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 09:53:12,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:53:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-06 09:53:12,063 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 24 [2021-05-06 09:53:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:12,064 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-06 09:53:12,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:12,064 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-06 09:53:12,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:53:12,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:12,065 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:12,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:12,284 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:12,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:12,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2117889998, now seen corresponding path program 1 times [2021-05-06 09:53:12,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:12,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562941717] [2021-05-06 09:53:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:12,293 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:12,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684649760] [2021-05-06 09:53:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 09:53:12,348 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 09:53:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 09:53:12,364 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 09:53:12,417 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 09:53:12,418 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 09:53:12,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:12,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:53:12 BasicIcfg [2021-05-06 09:53:12,641 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 09:53:12,642 INFO L168 Benchmark]: Toolchain (without parser) took 3365.78 ms. Allocated memory was 238.0 MB in the beginning and 289.4 MB in the end (delta: 51.4 MB). Free memory was 203.5 MB in the beginning and 229.2 MB in the end (delta: -25.8 MB). Peak memory consumption was 26.5 MB. Max. memory is 8.0 GB. [2021-05-06 09:53:12,642 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 238.0 MB. Free memory is still 220.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 09:53:12,642 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.18 ms. Allocated memory is still 238.0 MB. Free memory was 203.3 MB in the beginning and 221.0 MB in the end (delta: -17.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-06 09:53:12,642 INFO L168 Benchmark]: Boogie Preprocessor took 35.15 ms. Allocated memory is still 238.0 MB. Free memory was 221.0 MB in the beginning and 219.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 09:53:12,642 INFO L168 Benchmark]: RCFGBuilder took 372.83 ms. Allocated memory is still 238.0 MB. Free memory was 219.4 MB in the beginning and 202.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 09:53:12,642 INFO L168 Benchmark]: IcfgTransformer took 29.95 ms. Allocated memory is still 238.0 MB. Free memory was 202.6 MB in the beginning and 201.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 09:53:12,643 INFO L168 Benchmark]: TraceAbstraction took 2680.19 ms. Allocated memory was 238.0 MB in the beginning and 289.4 MB in the end (delta: 51.4 MB). Free memory was 201.0 MB in the beginning and 229.2 MB in the end (delta: -28.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 8.0 GB. [2021-05-06 09:53:12,643 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 238.0 MB. Free memory is still 220.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 239.18 ms. Allocated memory is still 238.0 MB. Free memory was 203.3 MB in the beginning and 221.0 MB in the end (delta: -17.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.15 ms. Allocated memory is still 238.0 MB. Free memory was 221.0 MB in the beginning and 219.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 372.83 ms. Allocated memory is still 238.0 MB. Free memory was 219.4 MB in the beginning and 202.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 29.95 ms. Allocated memory is still 238.0 MB. Free memory was 202.6 MB in the beginning and 201.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2680.19 ms. Allocated memory was 238.0 MB in the beginning and 289.4 MB in the end (delta: 51.4 MB). Free memory was 201.0 MB in the beginning and 229.2 MB in the end (delta: -28.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=18, counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L26] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=4, y=4] [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [\old(counter)=0, a=4, b=4, counter=0, p=1, q=0, x=4, y=4] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=4, counter=1, counter++=0, p=1, q=0, x=4, y=4] [L33] COND TRUE counter++<1 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(counter)=0, a=4, b=4, counter=1, p=1, q=0, x=4, y=4] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [\old(counter)=0, a=4, b=4, counter=1, p=1, q=0, x=4, y=4] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [\old(counter)=0, a=2, b=2, counter=1, p=4, q=0, x=4, y=4] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, b=2, counter=2, counter++=1, p=4, q=0, x=4, y=4] [L33] COND FALSE !(counter++<1) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2584.8ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 10.8ms, AutomataDifference: 514.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 110 SDtfs, 52 SDslu, 258 SDs, 0 SdLazy, 274 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 270.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 302.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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: 55.6ms AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 53.3ms SsaConstructionTime, 142.8ms SatisfiabilityAnalysisTime, 586.3ms InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 274 SizeOfPredicates, 8 NumberOfNonLiveVariables, 370 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 1/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...