/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/geo3-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:52:03,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:52:03,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:52:03,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:52:03,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:52:03,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:52:03,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:52:03,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:52:03,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:52:03,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:52:03,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:52:03,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:52:03,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:52:03,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:52:03,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:52:03,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:52:03,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:52:03,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:52:03,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:52:03,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:52:03,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:52:03,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:52:03,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:52:03,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:52:03,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:52:03,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:52:03,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:52:03,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:52:03,267 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:52:03,278 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:52:03,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:52:03,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:52:03,279 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:52:03,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:52:03,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:52:03,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:52:03,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:52:03,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:52:03,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:52:03,280 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:52:03,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:52:03,280 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:52:03,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:52:03,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:52:03,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:52:03,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:52:03,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:52:03,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:52:03,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:52:03,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:52:03,281 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:52:03,281 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:52:03,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:52:03,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:52:03,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:52:03,565 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:52:03,565 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:52:03,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound100.c [2021-05-02 20:52:03,603 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecd2ff383/ad489684cb4c4356b3b9c028a4610264/FLAG7a55f6544 [2021-05-02 20:52:03,953 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:52:03,953 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound100.c [2021-05-02 20:52:03,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecd2ff383/ad489684cb4c4356b3b9c028a4610264/FLAG7a55f6544 [2021-05-02 20:52:04,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecd2ff383/ad489684cb4c4356b3b9c028a4610264 [2021-05-02 20:52:04,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:52:04,395 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:52:04,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:04,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:52:04,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:52:04,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:04" (1/1) ... [2021-05-02 20:52:04,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71dec614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:04, skipping insertion in model container [2021-05-02 20:52:04,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:04" (1/1) ... [2021-05-02 20:52:04,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:52:04,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:52:04,523 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/geo3-ll_valuebound100.c[525,538] [2021-05-02 20:52:04,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:04,540 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:52:04,549 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/geo3-ll_valuebound100.c[525,538] [2021-05-02 20:52:04,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:04,561 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:52:04,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:04 WrapperNode [2021-05-02 20:52:04,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:04,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:52:04,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:52:04,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:52:04,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:04" (1/1) ... [2021-05-02 20:52:04,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:04" (1/1) ... [2021-05-02 20:52:04,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:04" (1/1) ... [2021-05-02 20:52:04,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:04" (1/1) ... [2021-05-02 20:52:04,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:04" (1/1) ... [2021-05-02 20:52:04,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:04" (1/1) ... [2021-05-02 20:52:04,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:04" (1/1) ... [2021-05-02 20:52:04,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:52:04,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:52:04,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:52:04,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:52:04,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:52:04,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:52:04,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:52:04,682 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:52:04,683 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:52:04,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:52:04,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:52:04,683 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:52:04,683 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:52:04,683 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:52:04,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:52:04,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:52:04,684 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:52:04,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:52:04,684 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:52:04,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:52:04,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:52:04,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:52:04,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:52:04,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:52:04,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:52:04,893 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:52:04,893 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:52:04,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:04 BoogieIcfgContainer [2021-05-02 20:52:04,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:52:04,894 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:52:04,894 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:52:04,895 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:52:04,896 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:04" (1/1) ... [2021-05-02 20:52:04,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:04 BasicIcfg [2021-05-02 20:52:04,907 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:52:04,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:52:04,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:52:04,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:52:04,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:52:04" (1/4) ... [2021-05-02 20:52:04,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1222eef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:04, skipping insertion in model container [2021-05-02 20:52:04,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:04" (2/4) ... [2021-05-02 20:52:04,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1222eef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:04, skipping insertion in model container [2021-05-02 20:52:04,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:04" (3/4) ... [2021-05-02 20:52:04,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1222eef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:04, skipping insertion in model container [2021-05-02 20:52:04,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:04" (4/4) ... [2021-05-02 20:52:04,911 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_valuebound100.cJordan [2021-05-02 20:52:04,914 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:52:04,917 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:52:04,927 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:52:04,955 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:52:04,955 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:52:04,955 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:52:04,955 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:52:04,955 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:52:04,955 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:52:04,955 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:52:04,956 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:52:04,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:52:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:52:04,973 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:04,974 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:04,974 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:04,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:04,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1338008438, now seen corresponding path program 1 times [2021-05-02 20:52:04,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:04,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268181183] [2021-05-02 20:52:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:05,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:05,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:05,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:52:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:05,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 20:52:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:05,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:05,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268181183] [2021-05-02 20:52:05,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268181183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:05,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:05,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:52:05,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677258218] [2021-05-02 20:52:05,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:52:05,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:05,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:52:05,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:05,168 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:52:05,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:05,242 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-02 20:52:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:52:05,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 20:52:05,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:05,248 INFO L225 Difference]: With dead ends: 31 [2021-05-02 20:52:05,248 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 20:52:05,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:05,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 20:52:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 20:52:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:52:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 20:52:05,270 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 29 [2021-05-02 20:52:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:05,270 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 20:52:05,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:52:05,270 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 20:52:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:52:05,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:05,272 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:05,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:52:05,272 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:05,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:05,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1251333530, now seen corresponding path program 1 times [2021-05-02 20:52:05,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:05,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828584329] [2021-05-02 20:52:05,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:05,291 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:05,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144355407] [2021-05-02 20:52:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:05,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:52:05,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:05,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:05,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:05,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:05,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:05,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:05,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 20:52:05,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:05,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828584329] [2021-05-02 20:52:05,666 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:05,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144355407] [2021-05-02 20:52:05,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144355407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:05,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:05,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:52:05,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375301802] [2021-05-02 20:52:05,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:52:05,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:05,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:52:05,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:05,668 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:52:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:05,739 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 20:52:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:05,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 20:52:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:05,741 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:52:05,741 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:52:05,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:52:05,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:52:05,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:52:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 20:52:05,746 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2021-05-02 20:52:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:05,746 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 20:52:05,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:52:05,747 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 20:52:05,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:52:05,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:05,747 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:05,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:52:05,961 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:05,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:05,961 INFO L82 PathProgramCache]: Analyzing trace with hash -284720885, now seen corresponding path program 1 times [2021-05-02 20:52:05,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:05,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688894554] [2021-05-02 20:52:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:05,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:05,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007129464] [2021-05-02 20:52:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:06,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 20:52:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:06,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:06,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:06,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:06,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:06,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:06,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:06,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:06,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 20:52:06,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:06,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688894554] [2021-05-02 20:52:06,303 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:06,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007129464] [2021-05-02 20:52:06,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007129464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:06,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:06,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:52:06,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479378145] [2021-05-02 20:52:06,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:52:06,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:06,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:52:06,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:06,305 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:09,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:09,065 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-05-02 20:52:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:52:09,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 20:52:09,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:09,067 INFO L225 Difference]: With dead ends: 41 [2021-05-02 20:52:09,067 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 20:52:09,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:52:09,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 20:52:09,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-02 20:52:09,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 26 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:52:09,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-05-02 20:52:09,072 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2021-05-02 20:52:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:09,073 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-05-02 20:52:09,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:09,073 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-05-02 20:52:09,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:52:09,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:09,074 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:09,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:09,289 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:09,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:09,290 INFO L82 PathProgramCache]: Analyzing trace with hash 534263172, now seen corresponding path program 1 times [2021-05-02 20:52:09,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:09,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24192793] [2021-05-02 20:52:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:09,300 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:09,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037137792] [2021-05-02 20:52:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:09,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:52:09,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:09,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:09,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:52:09,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:09,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24192793] [2021-05-02 20:52:09,477 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:09,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037137792] [2021-05-02 20:52:09,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037137792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:09,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:09,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:52:09,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825630298] [2021-05-02 20:52:09,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:52:09,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:09,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:52:09,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:52:09,479 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:52:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:11,571 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-05-02 20:52:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:11,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2021-05-02 20:52:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:11,574 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:52:11,574 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:52:11,574 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:52:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:52:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 20:52:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:52:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-02 20:52:11,578 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 42 [2021-05-02 20:52:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:11,578 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-02 20:52:11,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:52:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-02 20:52:11,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:52:11,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:11,579 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:11,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:11,789 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:11,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:11,789 INFO L82 PathProgramCache]: Analyzing trace with hash -590068614, now seen corresponding path program 2 times [2021-05-02 20:52:11,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:11,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984677296] [2021-05-02 20:52:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:11,813 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:11,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196013689] [2021-05-02 20:52:11,813 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:11,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:52:11,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:11,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:52:11,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:11,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:11,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:11,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:11,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:11,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:11,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:17,964 WARN L205 SmtUtils]: Spent 3.84 s on a formula simplification that was a NOOP. DAG size: 20 [2021-05-02 20:52:20,005 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2021-05-02 20:52:20,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:20,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 20:52:20,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:20,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984677296] [2021-05-02 20:52:20,046 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:20,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196013689] [2021-05-02 20:52:20,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196013689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:20,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:20,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:52:20,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365924444] [2021-05-02 20:52:20,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:52:20,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:20,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:52:20,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=126, Unknown=1, NotChecked=0, Total=156 [2021-05-02 20:52:20,048 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:52:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:28,790 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-05-02 20:52:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:52:28,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2021-05-02 20:52:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:28,791 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:52:28,791 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:52:28,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 7990.5ms TimeCoverageRelationStatistics Valid=44, Invalid=195, Unknown=1, NotChecked=0, Total=240 [2021-05-02 20:52:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:52:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 20:52:28,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:52:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-05-02 20:52:28,795 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 43 [2021-05-02 20:52:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:28,795 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-05-02 20:52:28,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:52:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-05-02 20:52:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:52:28,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:28,796 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:29,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:29,007 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:29,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1588029909, now seen corresponding path program 3 times [2021-05-02 20:52:29,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:29,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823555297] [2021-05-02 20:52:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:29,016 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:29,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37166077] [2021-05-02 20:52:29,016 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:29,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:52:29,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:29,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:52:29,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:29,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:31,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:31,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:31,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:31,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:31,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:31,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:52:31,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:31,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823555297] [2021-05-02 20:52:31,427 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:31,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37166077] [2021-05-02 20:52:31,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37166077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:31,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:31,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:52:31,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049476911] [2021-05-02 20:52:31,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:31,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:31,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:31,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:31,429 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:52:38,793 WARN L205 SmtUtils]: Spent 5.23 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:52:40,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:40,807 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-02 20:52:40,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2021-05-02 20:52:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:40,808 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:52:40,808 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:52:40,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5285.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:52:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:52:40,809 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) [2021-05-02 20:52:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:52:40,809 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2021-05-02 20:52:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:40,809 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:52:40,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:52:40,809 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:52:40,809 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:52:41,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:52:41,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:41 BasicIcfg [2021-05-02 20:52:41,013 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:52:41,013 INFO L168 Benchmark]: Toolchain (without parser) took 36618.15 ms. Allocated memory was 220.2 MB in the beginning and 270.5 MB in the end (delta: 50.3 MB). Free memory was 184.9 MB in the beginning and 221.9 MB in the end (delta: -37.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:41,013 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 220.2 MB. Free memory is still 202.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:52:41,013 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.61 ms. Allocated memory is still 220.2 MB. Free memory was 184.5 MB in the beginning and 174.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:41,014 INFO L168 Benchmark]: Boogie Preprocessor took 45.86 ms. Allocated memory is still 220.2 MB. Free memory was 174.7 MB in the beginning and 204.7 MB in the end (delta: -30.0 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:41,014 INFO L168 Benchmark]: RCFGBuilder took 285.06 ms. Allocated memory is still 220.2 MB. Free memory was 204.2 MB in the beginning and 189.0 MB in the end (delta: 15.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:41,014 INFO L168 Benchmark]: IcfgTransformer took 12.63 ms. Allocated memory is still 220.2 MB. Free memory was 189.0 MB in the beginning and 187.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:41,014 INFO L168 Benchmark]: TraceAbstraction took 36105.19 ms. Allocated memory was 220.2 MB in the beginning and 270.5 MB in the end (delta: 50.3 MB). Free memory was 186.9 MB in the beginning and 221.9 MB in the end (delta: -35.1 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:41,014 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 220.2 MB. Free memory is still 202.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 163.61 ms. Allocated memory is still 220.2 MB. Free memory was 184.5 MB in the beginning and 174.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.86 ms. Allocated memory is still 220.2 MB. Free memory was 174.7 MB in the beginning and 204.7 MB in the end (delta: -30.0 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 285.06 ms. Allocated memory is still 220.2 MB. Free memory was 204.2 MB in the beginning and 189.0 MB in the end (delta: 15.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.63 ms. Allocated memory is still 220.2 MB. Free memory was 189.0 MB in the beginning and 187.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 36105.19 ms. Allocated memory was 220.2 MB in the beginning and 270.5 MB in the end (delta: 50.3 MB). Free memory was 186.9 MB in the beginning and 221.9 MB in the end (delta: -35.1 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 36056.7ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 15.7ms, AutomataDifference: 23147.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 138 SDtfs, 90 SDslu, 545 SDs, 0 SdLazy, 395 SolverSat, 30 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 17571.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 220 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 13522.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=5, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 28.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 75.4ms SsaConstructionTime, 184.0ms SatisfiabilityAnalysisTime, 11239.3ms InterpolantComputationTime, 229 NumberOfCodeBlocks, 209 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 223 ConstructedInterpolants, 0 QuantifiedInterpolants, 865 SizeOfPredicates, 14 NumberOfNonLiveVariables, 732 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 104/135 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...