/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/bresenham-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:08:24,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:08:24,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:08:24,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:08:24,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:08:24,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:08:24,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:08:24,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:08:24,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:08:24,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:08:24,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:08:24,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:08:24,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:08:24,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:08:24,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:08:24,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:08:24,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:08:24,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:08:24,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:08:24,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:08:24,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:08:24,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:08:24,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:08:24,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:08:24,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:08:24,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:08:24,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:08:24,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:08:24,236 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:08:24,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:08:24,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:08:24,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:08:24,250 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:08:24,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:08:24,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:08:24,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:08:24,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:08:24,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:08:24,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:08:24,252 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:08:24,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:08:24,252 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:08:24,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:08:24,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:08:24,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:08:24,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:08:24,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:08:24,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:08:24,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:08:24,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:08:24,254 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:08:24,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:08:24,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:08:24,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:08:24,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:08:24,536 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:08:24,537 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:08:24,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound100.c [2021-05-06 07:08:24,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/265894102/e4a3234fa0f041e28dcddb816d69fb0d/FLAG37c857be8 [2021-05-06 07:08:24,976 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:08:24,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound100.c [2021-05-06 07:08:24,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/265894102/e4a3234fa0f041e28dcddb816d69fb0d/FLAG37c857be8 [2021-05-06 07:08:24,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/265894102/e4a3234fa0f041e28dcddb816d69fb0d [2021-05-06 07:08:24,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:08:24,998 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:08:25,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:08:25,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:08:25,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:08:25,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:08:24" (1/1) ... [2021-05-06 07:08:25,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd6ed21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:25, skipping insertion in model container [2021-05-06 07:08:25,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:08:24" (1/1) ... [2021-05-06 07:08:25,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:08:25,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:08:25,136 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/bresenham-ll_unwindbound100.c[597,610] [2021-05-06 07:08:25,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:08:25,161 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:08:25,170 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/bresenham-ll_unwindbound100.c[597,610] [2021-05-06 07:08:25,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:08:25,230 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:08:25,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:25 WrapperNode [2021-05-06 07:08:25,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:08:25,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:08:25,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:08:25,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:08:25,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:25" (1/1) ... [2021-05-06 07:08:25,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:25" (1/1) ... [2021-05-06 07:08:25,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:25" (1/1) ... [2021-05-06 07:08:25,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:25" (1/1) ... [2021-05-06 07:08:25,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:25" (1/1) ... [2021-05-06 07:08:25,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:25" (1/1) ... [2021-05-06 07:08:25,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:25" (1/1) ... [2021-05-06 07:08:25,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:08:25,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:08:25,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:08:25,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:08:25,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:25" (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 07:08:25,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:08:25,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:08:25,344 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:08:25,344 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:08:25,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:08:25,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:08:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:08:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:08:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:08:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:08:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:08:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:08:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:08:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:08:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:08:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:08:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:08:25,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:08:25,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:08:25,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:08:25,537 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:08:25,537 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 07:08:25,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:08:25 BoogieIcfgContainer [2021-05-06 07:08:25,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:08:25,539 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:08:25,539 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:08:25,539 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:08:25,541 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:08:25" (1/1) ... [2021-05-06 07:08:25,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:08:25 BasicIcfg [2021-05-06 07:08:25,568 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:08:25,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:08:25,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:08:25,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:08:25,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:08:24" (1/4) ... [2021-05-06 07:08:25,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610b010e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:08:25, skipping insertion in model container [2021-05-06 07:08:25,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:25" (2/4) ... [2021-05-06 07:08:25,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610b010e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:08:25, skipping insertion in model container [2021-05-06 07:08:25,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:08:25" (3/4) ... [2021-05-06 07:08:25,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610b010e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:08:25, skipping insertion in model container [2021-05-06 07:08:25,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:08:25" (4/4) ... [2021-05-06 07:08:25,573 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound100.cJordan [2021-05-06 07:08:25,593 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:08:25,605 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:08:25,616 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:08:25,628 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:08:25,628 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:08:25,628 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:08:25,637 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:08:25,637 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:08:25,637 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:08:25,637 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:08:25,637 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:08:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:08:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 07:08:25,654 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:25,655 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:25,655 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times [2021-05-06 07:08:25,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:25,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219490211] [2021-05-06 07:08:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:25,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:08:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:08:25,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:25,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219490211] [2021-05-06 07:08:25,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219490211] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:08:25,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:08:25,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:08:25,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108682920] [2021-05-06 07:08:25,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:08:25,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:25,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:08:25,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:08:25,887 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:08:25,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:25,928 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 07:08:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:08:25,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 07:08:25,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:25,934 INFO L225 Difference]: With dead ends: 26 [2021-05-06 07:08:25,934 INFO L226 Difference]: Without dead ends: 21 [2021-05-06 07:08:25,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:08:25,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-06 07:08:25,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-06 07:08:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:08:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-06 07:08:25,955 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-06 07:08:25,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:25,955 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-06 07:08:25,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:08:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-06 07:08:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 07:08:25,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:25,956 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:25,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:08:25,956 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:25,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:25,957 INFO L82 PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times [2021-05-06 07:08:25,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:25,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947634044] [2021-05-06 07:08:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:25,966 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:25,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29781315] [2021-05-06 07:08:25,967 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 07:08:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:26,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:08:26,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:26,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:08:26,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:26,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947634044] [2021-05-06 07:08:26,160 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:26,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29781315] [2021-05-06 07:08:26,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29781315] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:08:26,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:08:26,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:08:26,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383467925] [2021-05-06 07:08:26,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:08:26,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:26,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:08:26,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:08:26,165 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:08:26,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:26,245 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-05-06 07:08:26,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:08:26,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 07:08:26,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:26,246 INFO L225 Difference]: With dead ends: 32 [2021-05-06 07:08:26,247 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 07:08:26,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:08:26,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 07:08:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-06 07:08:26,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:08:26,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 07:08:26,260 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-05-06 07:08:26,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:26,261 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 07:08:26,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:08:26,263 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 07:08:26,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 07:08:26,264 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:26,265 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:26,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:08:26,473 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:26,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times [2021-05-06 07:08:26,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:26,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367315988] [2021-05-06 07:08:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:26,481 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:26,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935095498] [2021-05-06 07:08:26,481 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 07:08:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:26,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 07:08:26,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:26,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:08:26,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:26,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367315988] [2021-05-06 07:08:26,646 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:26,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935095498] [2021-05-06 07:08:26,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935095498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:08:26,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:08:26,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:08:26,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484259264] [2021-05-06 07:08:26,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:08:26,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:26,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:08:26,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:08:26,648 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:08:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:26,725 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-05-06 07:08:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:08:26,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-06 07:08:26,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:26,726 INFO L225 Difference]: With dead ends: 42 [2021-05-06 07:08:26,726 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 07:08:26,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:08:26,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 07:08:26,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-06 07:08:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:08:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-06 07:08:26,730 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2021-05-06 07:08:26,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:26,730 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-06 07:08:26,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:08:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-06 07:08:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 07:08:26,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:26,731 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:26,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:26,947 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:26,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:26,948 INFO L82 PathProgramCache]: Analyzing trace with hash -642681530, now seen corresponding path program 1 times [2021-05-06 07:08:26,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:26,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482969920] [2021-05-06 07:08:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:26,955 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:26,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307006400] [2021-05-06 07:08:26,955 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 07:08:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:27,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 07:08:27,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:27,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:27,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:27,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:08:27,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:27,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482969920] [2021-05-06 07:08:27,153 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:27,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307006400] [2021-05-06 07:08:27,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307006400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:08:27,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:08:27,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:08:27,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118801606] [2021-05-06 07:08:27,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:08:27,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:27,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:08:27,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:08:27,156 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:08:27,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:27,262 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-05-06 07:08:27,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:08:27,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-06 07:08:27,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:27,264 INFO L225 Difference]: With dead ends: 51 [2021-05-06 07:08:27,264 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 07:08:27,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:08:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 07:08:27,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-05-06 07:08:27,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:08:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 07:08:27,277 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 22 [2021-05-06 07:08:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:27,277 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 07:08:27,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:08:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 07:08:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:08:27,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:27,279 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:27,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:27,493 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:27,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:27,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times [2021-05-06 07:08:27,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:27,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892385417] [2021-05-06 07:08:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:27,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:27,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038459703] [2021-05-06 07:08:27,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:27,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:08:27,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:27,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:27,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:27,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:27,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:27,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:27,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:27,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:27,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:08:27,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:27,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892385417] [2021-05-06 07:08:27,588 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:27,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038459703] [2021-05-06 07:08:27,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038459703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:08:27,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:08:27,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 07:08:27,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300197851] [2021-05-06 07:08:27,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:08:27,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:27,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:08:27,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:08:27,589 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:08:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:27,622 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-05-06 07:08:27,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:08:27,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-05-06 07:08:27,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:27,625 INFO L225 Difference]: With dead ends: 46 [2021-05-06 07:08:27,625 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 07:08:27,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:08:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 07:08:27,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 07:08:27,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:08:27,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-06 07:08:27,635 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 23 [2021-05-06 07:08:27,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:27,635 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-06 07:08:27,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:08:27,635 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-06 07:08:27,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 07:08:27,636 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:27,636 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:27,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:27,852 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:27,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2036751370, now seen corresponding path program 1 times [2021-05-06 07:08:27,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:27,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410599256] [2021-05-06 07:08:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:27,859 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:27,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122342319] [2021-05-06 07:08:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:27,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 07:08:27,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:27,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:27,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:28,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:28,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:28,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:28,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:08:28,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:28,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410599256] [2021-05-06 07:08:28,111 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:28,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122342319] [2021-05-06 07:08:28,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122342319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:08:28,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:08:28,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 07:08:28,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957434157] [2021-05-06 07:08:28,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 07:08:28,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:28,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 07:08:28,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:08:28,112 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:08:28,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:28,300 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-05-06 07:08:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 07:08:28,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-05-06 07:08:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:28,301 INFO L225 Difference]: With dead ends: 55 [2021-05-06 07:08:28,301 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 07:08:28,301 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-06 07:08:28,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 07:08:28,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2021-05-06 07:08:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:08:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-06 07:08:28,303 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-05-06 07:08:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:28,304 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-06 07:08:28,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:08:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-06 07:08:28,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 07:08:28,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:28,304 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:28,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:08:28,509 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:28,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:28,509 INFO L82 PathProgramCache]: Analyzing trace with hash 398537738, now seen corresponding path program 2 times [2021-05-06 07:08:28,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:28,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121697339] [2021-05-06 07:08:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:28,516 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:28,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376474668] [2021-05-06 07:08:28,516 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:28,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:08:28,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:08:28,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 07:08:28,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:29,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:29,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:29,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:29,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:29,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:29,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:29,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:29,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:29,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:29,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:29,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:08:29,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:29,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121697339] [2021-05-06 07:08:29,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:29,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376474668] [2021-05-06 07:08:29,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376474668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:08:29,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:08:29,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 07:08:29,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612981355] [2021-05-06 07:08:29,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 07:08:29,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:29,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 07:08:29,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:08:29,071 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 13 states, 10 states have (on average 2.4) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:08:47,577 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-06 07:09:12,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:12,391 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-05-06 07:09:12,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 07:09:12,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.4) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-05-06 07:09:12,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:12,393 INFO L225 Difference]: With dead ends: 52 [2021-05-06 07:09:12,393 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:09:12,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 675.6ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-06 07:09:12,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:09:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:09:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 07:09:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:09:12,393 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-05-06 07:09:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:12,394 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:09:12,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 10 states have (on average 2.4) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:09:12,396 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:09:12,396 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:09:12,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:12,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:09:12 BasicIcfg [2021-05-06 07:09:12,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:09:12,604 INFO L168 Benchmark]: Toolchain (without parser) took 47606.30 ms. Allocated memory is still 185.6 MB. Free memory was 150.8 MB in the beginning and 64.6 MB in the end (delta: 86.1 MB). Peak memory consumption was 87.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:09:12,604 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 185.6 MB. Free memory is still 167.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:09:12,604 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.99 ms. Allocated memory is still 185.6 MB. Free memory was 150.6 MB in the beginning and 170.2 MB in the end (delta: -19.6 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. [2021-05-06 07:09:12,604 INFO L168 Benchmark]: Boogie Preprocessor took 46.82 ms. Allocated memory is still 185.6 MB. Free memory was 170.2 MB in the beginning and 168.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:09:12,604 INFO L168 Benchmark]: RCFGBuilder took 258.59 ms. Allocated memory is still 185.6 MB. Free memory was 168.1 MB in the beginning and 152.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:09:12,604 INFO L168 Benchmark]: IcfgTransformer took 29.36 ms. Allocated memory is still 185.6 MB. Free memory was 152.4 MB in the beginning and 151.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:09:12,605 INFO L168 Benchmark]: TraceAbstraction took 47034.59 ms. Allocated memory is still 185.6 MB. Free memory was 150.8 MB in the beginning and 64.6 MB in the end (delta: 86.2 MB). Peak memory consumption was 88.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:09:12,605 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 185.6 MB. Free memory is still 167.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 228.99 ms. Allocated memory is still 185.6 MB. Free memory was 150.6 MB in the beginning and 170.2 MB in the end (delta: -19.6 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.82 ms. Allocated memory is still 185.6 MB. Free memory was 170.2 MB in the beginning and 168.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 258.59 ms. Allocated memory is still 185.6 MB. Free memory was 168.1 MB in the beginning and 152.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 29.36 ms. Allocated memory is still 185.6 MB. Free memory was 152.4 MB in the beginning and 151.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 47034.59 ms. Allocated memory is still 185.6 MB. Free memory was 150.8 MB in the beginning and 64.6 MB in the end (delta: 86.2 MB). Peak memory consumption was 88.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 46974.4ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 15.1ms, AutomataDifference: 43879.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 138 SDtfs, 82 SDslu, 630 SDs, 0 SdLazy, 780 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 43118.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1072.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=4, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 50.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 62.6ms SsaConstructionTime, 155.6ms SatisfiabilityAnalysisTime, 1192.6ms InterpolantComputationTime, 152 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 1035 SizeOfPredicates, 24 NumberOfNonLiveVariables, 842 ConjunctsInSsa, 122 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 20/46 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...