/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:05:56,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:05:56,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:05:56,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:05:56,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:05:56,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:05:56,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:05:56,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:05:56,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:05:56,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:05:56,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:05:56,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:05:56,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:05:56,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:05:56,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:05:56,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:05:56,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:05:56,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:05:56,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:05:56,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:05:56,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:05:56,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:05:56,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:05:56,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:05:56,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:05:56,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:05:56,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:05:56,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:05:56,258 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:05:56,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:05:56,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:05:56,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:05:56,270 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:05:56,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:05:56,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:05:56,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:05:56,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:05:56,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:05:56,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:05:56,271 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:05:56,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:05:56,271 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:05:56,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:05:56,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:05:56,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:05:56,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:05:56,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:05:56,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:05:56,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:05:56,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:05:56,273 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:05:56,273 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:05:56,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:05:56,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:05:56,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:05:56,586 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:05:56,587 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:05:56,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound100.c [2021-05-02 22:05:56,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc68081ae/2e4f47bdd66444aa8f9967ec63e66595/FLAG7cbf5981a [2021-05-02 22:05:57,053 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:05:57,053 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound100.c [2021-05-02 22:05:57,057 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc68081ae/2e4f47bdd66444aa8f9967ec63e66595/FLAG7cbf5981a [2021-05-02 22:05:57,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc68081ae/2e4f47bdd66444aa8f9967ec63e66595 [2021-05-02 22:05:57,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:05:57,082 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:05:57,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:05:57,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:05:57,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:05:57,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:05:57" (1/1) ... [2021-05-02 22:05:57,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e31f196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:57, skipping insertion in model container [2021-05-02 22:05:57,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:05:57" (1/1) ... [2021-05-02 22:05:57,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:05:57,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:05:57,234 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound100.c[454,467] [2021-05-02 22:05:57,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:05:57,249 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:05:57,260 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound100.c[454,467] [2021-05-02 22:05:57,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:05:57,275 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:05:57,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:57 WrapperNode [2021-05-02 22:05:57,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:05:57,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:05:57,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:05:57,277 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:05:57,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:57" (1/1) ... [2021-05-02 22:05:57,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:57" (1/1) ... [2021-05-02 22:05:57,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:57" (1/1) ... [2021-05-02 22:05:57,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:57" (1/1) ... [2021-05-02 22:05:57,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:57" (1/1) ... [2021-05-02 22:05:57,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:57" (1/1) ... [2021-05-02 22:05:57,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:57" (1/1) ... [2021-05-02 22:05:57,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:05:57,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:05:57,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:05:57,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:05:57,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:57" (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 22:05:57,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:05:57,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:05:57,395 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:05:57,395 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:05:57,396 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:05:57,396 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:05:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:05:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:05:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:05:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:05:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 22:05:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:05:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:05:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:05:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:05:57,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:05:57,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:05:57,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:05:57,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:05:57,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:05:57,642 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:05:57,642 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:05:57,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:05:57 BoogieIcfgContainer [2021-05-02 22:05:57,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:05:57,644 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:05:57,644 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:05:57,645 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:05:57,646 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:05:57" (1/1) ... [2021-05-02 22:05:57,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:05:57 BasicIcfg [2021-05-02 22:05:57,680 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:05:57,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:05:57,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:05:57,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:05:57,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:05:57" (1/4) ... [2021-05-02 22:05:57,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ee9420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:05:57, skipping insertion in model container [2021-05-02 22:05:57,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:57" (2/4) ... [2021-05-02 22:05:57,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ee9420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:05:57, skipping insertion in model container [2021-05-02 22:05:57,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:05:57" (3/4) ... [2021-05-02 22:05:57,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ee9420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:05:57, skipping insertion in model container [2021-05-02 22:05:57,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:05:57" (4/4) ... [2021-05-02 22:05:57,685 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound100.cJordan [2021-05-02 22:05:57,690 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:05:57,693 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:05:57,704 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:05:57,715 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:05:57,715 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:05:57,716 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:05:57,716 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:05:57,716 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:05:57,716 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:05:57,716 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:05:57,716 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:05:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:05:57,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:05:57,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:05:57,729 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:05:57,729 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:05:57,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:05:57,733 INFO L82 PathProgramCache]: Analyzing trace with hash 409333534, now seen corresponding path program 1 times [2021-05-02 22:05:57,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:05:57,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409522111] [2021-05-02 22:05:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:05:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:05:57,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:05:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:05:57,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:05:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:05:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:05:57,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:05:57,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409522111] [2021-05-02 22:05:57,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409522111] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:05:57,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:05:57,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:05:57,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377626020] [2021-05-02 22:05:57,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:05:57,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:05:57,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:05:57,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:05:57,879 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:05:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:05:57,939 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-05-02 22:05:57,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:05:57,941 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 [2021-05-02 22:05:57,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:05:57,946 INFO L225 Difference]: With dead ends: 27 [2021-05-02 22:05:57,946 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 22:05:57,947 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:05:57,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 22:05:57,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 22:05:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:05:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-02 22:05:57,971 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-05-02 22:05:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:05:57,972 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-02 22:05:57,972 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) [2021-05-02 22:05:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-02 22:05:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:05:57,973 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:05:57,973 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:05:57,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:05:57,974 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:05:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:05:57,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1396244096, now seen corresponding path program 1 times [2021-05-02 22:05:57,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:05:57,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576835589] [2021-05-02 22:05:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:05:58,001 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:05:58,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113418478] [2021-05-02 22:05:58,001 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 22:05:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:05:58,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:05:58,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:05:58,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:05:58,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:05:58,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576835589] [2021-05-02 22:05:58,167 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:05:58,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113418478] [2021-05-02 22:05:58,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113418478] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:05:58,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:05:58,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 22:05:58,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444994546] [2021-05-02 22:05:58,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:05:58,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:05:58,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:05:58,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:05:58,170 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:05:58,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:05:58,244 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-05-02 22:05:58,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:05:58,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:05:58,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:05:58,245 INFO L225 Difference]: With dead ends: 30 [2021-05-02 22:05:58,245 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 22:05:58,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:05:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 22:05:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 22:05:58,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:05:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-02 22:05:58,249 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2021-05-02 22:05:58,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:05:58,250 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-02 22:05:58,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:05:58,250 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-02 22:05:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 22:05:58,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:05:58,250 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:05:58,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:05:58,460 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:05:58,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:05:58,461 INFO L82 PathProgramCache]: Analyzing trace with hash 279144821, now seen corresponding path program 1 times [2021-05-02 22:05:58,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:05:58,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794841762] [2021-05-02 22:05:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:05:58,471 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:05:58,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315438187] [2021-05-02 22:05:58,471 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 22:05:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:05:58,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:05:58,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:05:58,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:05:58,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:05:58,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794841762] [2021-05-02 22:05:58,634 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:05:58,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315438187] [2021-05-02 22:05:58,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315438187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:05:58,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:05:58,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:05:58,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338658726] [2021-05-02 22:05:58,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:05:58,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:05:58,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:05:58,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:05:58,635 INFO L87 Difference]: Start difference. First operand 29 states and 30 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:05:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:05:58,719 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-05-02 22:05:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:05:58,719 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 22:05:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:05:58,722 INFO L225 Difference]: With dead ends: 37 [2021-05-02 22:05:58,722 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 22:05:58,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:05:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 22:05:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 22:05:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:05:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-02 22:05:58,727 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2021-05-02 22:05:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:05:58,727 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-02 22:05:58,727 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:05:58,727 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-02 22:05:58,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 22:05:58,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:05:58,728 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:05:58,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:05:58,929 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:05:58,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:05:58,929 INFO L82 PathProgramCache]: Analyzing trace with hash -522906656, now seen corresponding path program 2 times [2021-05-02 22:05:58,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:05:58,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472278095] [2021-05-02 22:05:58,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:05:58,938 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:05:58,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765662041] [2021-05-02 22:05:58,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:05:58,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:05:58,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:05:58,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:05:58,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:05:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:05:59,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:05:59,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472278095] [2021-05-02 22:05:59,179 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:05:59,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765662041] [2021-05-02 22:05:59,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765662041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:05:59,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:05:59,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:05:59,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700214293] [2021-05-02 22:05:59,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:05:59,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:05:59,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:05:59,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:05:59,181 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:05:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:05:59,269 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-02 22:05:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:05:59,270 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-02 22:05:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:05:59,272 INFO L225 Difference]: With dead ends: 44 [2021-05-02 22:05:59,272 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 22:05:59,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:05:59,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 22:05:59,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 22:05:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:05:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-02 22:05:59,277 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 31 [2021-05-02 22:05:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:05:59,277 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-02 22:05:59,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:05:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-02 22:05:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 22:05:59,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:05:59,278 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:05:59,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:05:59,481 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:05:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:05:59,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1704072427, now seen corresponding path program 3 times [2021-05-02 22:05:59,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:05:59,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819563425] [2021-05-02 22:05:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:05:59,493 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:05:59,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500331610] [2021-05-02 22:05:59,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:05:59,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:05:59,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:05:59,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:05:59,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:05:59,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:59,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 22:05:59,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:05:59,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819563425] [2021-05-02 22:05:59,646 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:05:59,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500331610] [2021-05-02 22:05:59,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500331610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:05:59,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:05:59,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:05:59,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548745530] [2021-05-02 22:05:59,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:05:59,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:05:59,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:05:59,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:05:59,648 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 22:05:59,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:05:59,671 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-05-02 22:05:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 22:05:59,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-05-02 22:05:59,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:05:59,676 INFO L225 Difference]: With dead ends: 41 [2021-05-02 22:05:59,676 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:05:59,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:05:59,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:05:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:05:59,677 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 22:05:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:05:59,677 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2021-05-02 22:05:59,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:05:59,677 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:05:59,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 22:05:59,677 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:05:59,677 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:05:59,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:05:59,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:05:59 BasicIcfg [2021-05-02 22:05:59,886 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:05:59,886 INFO L168 Benchmark]: Toolchain (without parser) took 2804.62 ms. Allocated memory was 207.6 MB in the beginning and 249.6 MB in the end (delta: 41.9 MB). Free memory was 173.5 MB in the beginning and 171.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 44.1 MB. Max. memory is 8.0 GB. [2021-05-02 22:05:59,886 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 207.6 MB. Free memory was 190.3 MB in the beginning and 190.1 MB in the end (delta: 210.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:05:59,886 INFO L168 Benchmark]: CACSL2BoogieTranslator took 191.22 ms. Allocated memory is still 207.6 MB. Free memory was 173.3 MB in the beginning and 163.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 22:05:59,887 INFO L168 Benchmark]: Boogie Preprocessor took 55.77 ms. Allocated memory is still 207.6 MB. Free memory was 163.8 MB in the beginning and 192.0 MB in the end (delta: -28.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-02 22:05:59,887 INFO L168 Benchmark]: RCFGBuilder took 310.56 ms. Allocated memory is still 207.6 MB. Free memory was 192.0 MB in the beginning and 178.1 MB in the end (delta: 13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:05:59,887 INFO L168 Benchmark]: IcfgTransformer took 36.08 ms. Allocated memory is still 207.6 MB. Free memory was 178.1 MB in the beginning and 176.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 22:05:59,887 INFO L168 Benchmark]: TraceAbstraction took 2204.57 ms. Allocated memory was 207.6 MB in the beginning and 249.6 MB in the end (delta: 41.9 MB). Free memory was 176.0 MB in the beginning and 171.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. [2021-05-02 22:05:59,887 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 207.6 MB. Free memory was 190.3 MB in the beginning and 190.1 MB in the end (delta: 210.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 191.22 ms. Allocated memory is still 207.6 MB. Free memory was 173.3 MB in the beginning and 163.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.77 ms. Allocated memory is still 207.6 MB. Free memory was 163.8 MB in the beginning and 192.0 MB in the end (delta: -28.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 310.56 ms. Allocated memory is still 207.6 MB. Free memory was 192.0 MB in the beginning and 178.1 MB in the end (delta: 13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 36.08 ms. Allocated memory is still 207.6 MB. Free memory was 178.1 MB in the beginning and 176.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2204.57 ms. Allocated memory was 207.6 MB in the beginning and 249.6 MB in the end (delta: 41.9 MB). Free memory was 176.0 MB in the beginning and 171.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2168.6ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 9.4ms, AutomataDifference: 364.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 101 SDtfs, 52 SDslu, 375 SDs, 0 SdLazy, 203 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 165.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 199.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=4, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 26.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 40.1ms SsaConstructionTime, 99.4ms SatisfiabilityAnalysisTime, 592.1ms InterpolantComputationTime, 127 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 322 SizeOfPredicates, 10 NumberOfNonLiveVariables, 476 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 38/52 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...