/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/divbin_valuebound100.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:58:02,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:58:02,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:58:02,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:58:02,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:58:02,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:58:02,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:58:02,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:58:02,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:58:02,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:58:02,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:58:02,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:58:02,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:58:02,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:58:02,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:58:02,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:58:02,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:58:02,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:58:02,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:58:02,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:58:02,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:58:02,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:58:02,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:58:02,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:58:02,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:58:02,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:58:02,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:58:02,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:58:02,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:58:02,256 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:58:02,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:58:02,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:58:02,258 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:58:02,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:58:02,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:58:02,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:58:02,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:58:02,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:58:02,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:58:02,259 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:58:02,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:58:02,260 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:58:02,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:58:02,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:58:02,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:58:02,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:58:02,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:58:02,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:58:02,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:58:02,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:58:02,262 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:58:02,262 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:58:02,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:58:02,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:58:02,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:58:02,662 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:58:02,669 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:58:02,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound100.i [2021-05-06 07:58:02,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5122252c7/6a568e4757604f2e9bdb880df3139d99/FLAGf0237ae87 [2021-05-06 07:58:03,260 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:58:03,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound100.i [2021-05-06 07:58:03,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5122252c7/6a568e4757604f2e9bdb880df3139d99/FLAGf0237ae87 [2021-05-06 07:58:03,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5122252c7/6a568e4757604f2e9bdb880df3139d99 [2021-05-06 07:58:03,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:58:03,647 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:58:03,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:58:03,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:58:03,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:58:03,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:58:03" (1/1) ... [2021-05-06 07:58:03,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@234dd06a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:03, skipping insertion in model container [2021-05-06 07:58:03,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:58:03" (1/1) ... [2021-05-06 07:58:03,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:58:03,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:58:03,804 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/divbin_valuebound100.i[958,971] [2021-05-06 07:58:03,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:58:03,840 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:58:03,857 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/divbin_valuebound100.i[958,971] [2021-05-06 07:58:03,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:58:03,919 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:58:03,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:03 WrapperNode [2021-05-06 07:58:03,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:58:03,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:58:03,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:58:03,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:58:03,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:03" (1/1) ... [2021-05-06 07:58:03,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:03" (1/1) ... [2021-05-06 07:58:03,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:03" (1/1) ... [2021-05-06 07:58:03,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:03" (1/1) ... [2021-05-06 07:58:03,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:03" (1/1) ... [2021-05-06 07:58:03,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:03" (1/1) ... [2021-05-06 07:58:03,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:03" (1/1) ... [2021-05-06 07:58:03,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:58:03,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:58:03,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:58:03,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:58:03,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:58:04,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:58:04,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:58:04,085 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:58:04,085 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:58:04,085 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:58:04,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:58:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:58:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:58:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 07:58:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 07:58:04,087 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:58:04,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:58:04,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:58:04,087 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:58:04,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:58:04,088 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:58:04,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:58:04,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:58:04,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:58:04,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:58:04,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:58:04,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:58:04,453 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:58:04,453 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:58:04,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:58:04 BoogieIcfgContainer [2021-05-06 07:58:04,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:58:04,455 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:58:04,456 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:58:04,456 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:58:04,459 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:58:04" (1/1) ... [2021-05-06 07:58:04,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:58:04 BasicIcfg [2021-05-06 07:58:04,474 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:58:04,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:58:04,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:58:04,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:58:04,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:58:03" (1/4) ... [2021-05-06 07:58:04,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a727cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:58:04, skipping insertion in model container [2021-05-06 07:58:04,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:58:03" (2/4) ... [2021-05-06 07:58:04,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a727cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:58:04, skipping insertion in model container [2021-05-06 07:58:04,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:58:04" (3/4) ... [2021-05-06 07:58:04,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a727cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:58:04, skipping insertion in model container [2021-05-06 07:58:04,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:58:04" (4/4) ... [2021-05-06 07:58:04,481 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound100.iJordan [2021-05-06 07:58:04,486 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:58:04,490 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:58:04,505 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:58:04,523 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:58:04,523 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:58:04,523 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:58:04,524 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:58:04,524 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:58:04,524 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:58:04,524 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:58:04,524 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:58:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 07:58:04,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 07:58:04,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:58:04,551 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:58:04,552 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:58:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:58:04,557 INFO L82 PathProgramCache]: Analyzing trace with hash -402483300, now seen corresponding path program 1 times [2021-05-06 07:58:04,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:58:04,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920354307] [2021-05-06 07:58:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:58:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:04,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:58:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:04,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:58:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:04,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 07:58:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:04,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 07:58:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:04,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 07:58:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 07:58:04,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:58:04,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920354307] [2021-05-06 07:58:04,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920354307] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:58:04,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:58:04,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:58:04,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124765589] [2021-05-06 07:58:04,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:58:04,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:58:04,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:58:04,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:58:04,938 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:58:05,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:58:05,088 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 07:58:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:58:05,090 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 07:58:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:58:05,098 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:58:05,098 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 07:58:05,100 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:58:05,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 07:58:05,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 07:58:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:58:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 07:58:05,138 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-06 07:58:05,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:58:05,139 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 07:58:05,140 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:58:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 07:58:05,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 07:58:05,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:58:05,142 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:58:05,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:58:05,142 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:58:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:58:05,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1131459816, now seen corresponding path program 1 times [2021-05-06 07:58:05,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:58:05,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268817490] [2021-05-06 07:58:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:58:05,177 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:58:05,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855448743] [2021-05-06 07:58:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:58:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:05,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:58:05,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:58:05,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:05,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:05,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:05,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:05,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:05,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:05,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 07:58:05,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:58:05,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268817490] [2021-05-06 07:58:05,575 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:58:05,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855448743] [2021-05-06 07:58:05,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855448743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:58:05,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:58:05,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:58:05,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105293201] [2021-05-06 07:58:05,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:58:05,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:58:05,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:58:05,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:58:05,579 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:58:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:58:05,762 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-06 07:58:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:58:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2021-05-06 07:58:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:58:05,765 INFO L225 Difference]: With dead ends: 42 [2021-05-06 07:58:05,765 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 07:58:05,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:58:05,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 07:58:05,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-06 07:58:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 07:58:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-06 07:58:05,782 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-06 07:58:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:58:05,784 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-06 07:58:05,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:58:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-06 07:58:05,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 07:58:05,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:58:05,785 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:58:06,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:58:06,009 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:58:06,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:58:06,010 INFO L82 PathProgramCache]: Analyzing trace with hash -305154333, now seen corresponding path program 1 times [2021-05-06 07:58:06,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:58:06,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501133969] [2021-05-06 07:58:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:58:06,031 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:58:06,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490037444] [2021-05-06 07:58:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:58:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:06,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 07:58:06,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:58:06,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:58:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 07:58:06,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:58:06,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501133969] [2021-05-06 07:58:06,367 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:58:06,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490037444] [2021-05-06 07:58:06,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490037444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:58:06,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:58:06,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:58:06,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756377491] [2021-05-06 07:58:06,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:58:06,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:58:06,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:58:06,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:58:06,369 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:58:08,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:58:08,744 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-05-06 07:58:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:58:08,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 07:58:08,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:58:08,746 INFO L225 Difference]: With dead ends: 54 [2021-05-06 07:58:08,746 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 07:58:08,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:58:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 07:58:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2021-05-06 07:58:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 07:58:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-05-06 07:58:08,754 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 37 [2021-05-06 07:58:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:58:08,754 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-05-06 07:58:08,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:58:08,754 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-05-06 07:58:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 07:58:08,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:58:08,756 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:58:08,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:58:08,957 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:58:08,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:58:08,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1858557484, now seen corresponding path program 1 times [2021-05-06 07:58:08,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:58:08,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867712837] [2021-05-06 07:58:08,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:58:08,983 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:58:08,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508413195] [2021-05-06 07:58:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:58:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:58:09,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 07:58:09,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:58:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 07:58:09,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:58:09,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867712837] [2021-05-06 07:58:09,192 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:58:09,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508413195] [2021-05-06 07:58:09,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508413195] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:58:09,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:58:09,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:58:09,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896776858] [2021-05-06 07:58:09,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:58:09,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:58:09,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:58:09,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:58:09,195 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 07:58:09,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:58:09,235 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-05-06 07:58:09,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:58:09,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-05-06 07:58:09,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:58:09,238 INFO L225 Difference]: With dead ends: 45 [2021-05-06 07:58:09,238 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 07:58:09,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:58:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 07:58:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 07:58:09,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 07:58:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 07:58:09,264 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 43 [2021-05-06 07:58:09,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:58:09,264 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 07:58:09,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 07:58:09,265 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 07:58:09,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 07:58:09,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:58:09,266 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:58:09,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:58:09,493 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:58:09,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:58:09,494 INFO L82 PathProgramCache]: Analyzing trace with hash 270500047, now seen corresponding path program 1 times [2021-05-06 07:58:09,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:58:09,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849826871] [2021-05-06 07:58:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:58:09,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:58:09,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054203088] [2021-05-06 07:58:09,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true