/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/prodbin-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:11:12,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:11:12,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:11:12,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:11:12,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:11:12,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:11:12,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:11:12,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:11:12,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:11:12,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:11:12,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:11:12,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:11:12,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:11:12,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:11:12,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:11:12,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:11:12,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:11:12,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:11:12,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:11:12,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:11:12,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:11:12,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:11:12,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:11:12,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:11:12,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:11:12,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:11:12,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:11:12,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:11:12,294 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:11:12,308 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:11:12,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:11:12,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:11:12,310 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:11:12,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:11:12,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:11:12,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:11:12,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:11:12,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:11:12,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:11:12,311 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:11:12,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:11:12,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:11:12,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:11:12,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:11:12,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:11:12,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:11:12,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:11:12,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:11:12,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:11:12,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:11:12,313 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:11:12,313 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:11:12,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:11:12,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:11:12,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:11:12,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:11:12,636 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:11:12,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound100.c [2021-05-06 10:11:12,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/091019429/e38f59059cb1413e87b73e4871505490/FLAG689c460a3 [2021-05-06 10:11:13,004 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:11:13,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound100.c [2021-05-06 10:11:13,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/091019429/e38f59059cb1413e87b73e4871505490/FLAG689c460a3 [2021-05-06 10:11:13,017 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/091019429/e38f59059cb1413e87b73e4871505490 [2021-05-06 10:11:13,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:11:13,020 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:11:13,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:11:13,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:11:13,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:11:13,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:11:13" (1/1) ... [2021-05-06 10:11:13,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@760c1941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:11:13, skipping insertion in model container [2021-05-06 10:11:13,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:11:13" (1/1) ... [2021-05-06 10:11:13,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:11:13,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:11:13,135 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/prodbin-ll_valuebound100.c[537,550] [2021-05-06 10:11:13,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:11:13,150 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:11:13,164 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/prodbin-ll_valuebound100.c[537,550] [2021-05-06 10:11:13,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:11:13,192 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:11:13,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:11:13 WrapperNode [2021-05-06 10:11:13,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:11:13,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:11:13,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:11:13,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:11:13,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:11:13" (1/1) ... [2021-05-06 10:11:13,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:11:13" (1/1) ... [2021-05-06 10:11:13,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:11:13" (1/1) ... [2021-05-06 10:11:13,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:11:13" (1/1) ... [2021-05-06 10:11:13,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:11:13" (1/1) ... [2021-05-06 10:11:13,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:11:13" (1/1) ... [2021-05-06 10:11:13,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:11:13" (1/1) ... [2021-05-06 10:11:13,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:11:13,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:11:13,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:11:13,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:11:13,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:11:13" (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 10:11:13,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:11:13,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:11:13,325 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:11:13,325 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:11:13,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:11:13,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:11:13,326 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:11:13,326 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:11:13,326 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:11:13,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:11:13,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:11:13,326 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:11:13,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:11:13,327 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:11:13,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:11:13,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:11:13,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:11:13,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:11:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:11:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:11:13,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:11:13,567 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:11:13,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:11:13 BoogieIcfgContainer [2021-05-06 10:11:13,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:11:13,568 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:11:13,568 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:11:13,569 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:11:13,571 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:11:13" (1/1) ... [2021-05-06 10:11:13,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:11:13 BasicIcfg [2021-05-06 10:11:13,579 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:11:13,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:11:13,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:11:13,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:11:13,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:11:13" (1/4) ... [2021-05-06 10:11:13,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714019ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:11:13, skipping insertion in model container [2021-05-06 10:11:13,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:11:13" (2/4) ... [2021-05-06 10:11:13,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714019ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:11:13, skipping insertion in model container [2021-05-06 10:11:13,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:11:13" (3/4) ... [2021-05-06 10:11:13,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714019ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:11:13, skipping insertion in model container [2021-05-06 10:11:13,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:11:13" (4/4) ... [2021-05-06 10:11:13,584 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound100.cJordan [2021-05-06 10:11:13,587 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:11:13,589 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:11:13,598 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:11:13,611 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:11:13,611 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:11:13,611 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:11:13,611 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:11:13,611 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:11:13,611 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:11:13,611 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:11:13,611 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:11:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:11:13,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:11:13,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:11:13,624 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:11:13,624 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:11:13,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:11:13,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1656134296, now seen corresponding path program 1 times [2021-05-06 10:11:13,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:11:13,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833101837] [2021-05-06 10:11:13,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:11:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:11:13,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:11:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:11:13,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:11:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:11:13,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 10:11:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:11:13,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 10:11:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:11:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:11:13,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:11:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833101837] [2021-05-06 10:11:13,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833101837] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:11:13,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:11:13,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:11:13,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827459915] [2021-05-06 10:11:13,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:11:13,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:11:13,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:11:13,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:11:13,861 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:11:13,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:11:13,945 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-06 10:11:13,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:11:13,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 10:11:13,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:11:13,952 INFO L225 Difference]: With dead ends: 32 [2021-05-06 10:11:13,952 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 10:11:13,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:11:13,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 10:11:13,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 10:11:13,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:11:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 10:11:13,979 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2021-05-06 10:11:13,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:11:13,979 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 10:11:13,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:11:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 10:11:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:11:13,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:11:13,981 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:11:13,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:11:13,981 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:11:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:11:13,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1063826184, now seen corresponding path program 1 times [2021-05-06 10:11:13,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:11:13,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823932122] [2021-05-06 10:11:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:11:14,011 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:11:14,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526386250] [2021-05-06 10:11:14,011 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 10:11:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:11:14,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 10:11:14,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:11:14,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:11:14,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:11:14,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823932122] [2021-05-06 10:11:14,267 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:11:14,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526386250] [2021-05-06 10:11:14,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526386250] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:11:14,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:11:14,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:11:14,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662820916] [2021-05-06 10:11:14,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:11:14,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:11:14,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:11:14,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:11:14,268 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:11:14,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:11:14,305 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-06 10:11:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:11:14,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 10:11:14,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:11:14,306 INFO L225 Difference]: With dead ends: 37 [2021-05-06 10:11:14,306 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 10:11:14,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:11:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 10:11:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-05-06 10:11:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:11:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-05-06 10:11:14,311 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2021-05-06 10:11:14,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:11:14,312 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-05-06 10:11:14,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:11:14,312 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-05-06 10:11:14,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:11:14,313 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:11:14,313 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 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 10:11:14,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:11:14,533 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:11:14,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:11:14,533 INFO L82 PathProgramCache]: Analyzing trace with hash -499634320, now seen corresponding path program 1 times [2021-05-06 10:11:14,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:11:14,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552279332] [2021-05-06 10:11:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:11:14,542 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:11:14,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688256434] [2021-05-06 10:11:14,543 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 10:11:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:11:14,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:11:14,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:11:14,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:14,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:14,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 10:11:14,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:11:14,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552279332] [2021-05-06 10:11:14,672 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:11:14,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688256434] [2021-05-06 10:11:14,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688256434] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:11:14,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:11:14,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 10:11:14,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509219008] [2021-05-06 10:11:14,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:11:14,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:11:14,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:11:14,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:11:14,674 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 10:11:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:11:14,787 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-06 10:11:14,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:11:14,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 34 [2021-05-06 10:11:14,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:11:14,789 INFO L225 Difference]: With dead ends: 36 [2021-05-06 10:11:14,789 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 10:11:14,789 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:11:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 10:11:14,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-05-06 10:11:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:11:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-06 10:11:14,793 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2021-05-06 10:11:14,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:11:14,793 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-06 10:11:14,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 10:11:14,794 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-06 10:11:14,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 10:11:14,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:11:14,794 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:11:15,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:11:15,009 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:11:15,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:11:15,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1096608558, now seen corresponding path program 1 times [2021-05-06 10:11:15,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:11:15,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75391122] [2021-05-06 10:11:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:11:15,026 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:11:15,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926110947] [2021-05-06 10:11:15,027 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 10:11:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:11:15,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 10:11:15,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:11:15,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:11:15,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:11:15,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75391122] [2021-05-06 10:11:15,521 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:11:15,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926110947] [2021-05-06 10:11:15,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926110947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:11:15,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:11:15,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:11:15,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182867449] [2021-05-06 10:11:15,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:11:15,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:11:15,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:11:15,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:11:15,525 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 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 10:11:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:11:17,815 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2021-05-06 10:11:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:11:17,816 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 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 37 [2021-05-06 10:11:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:11:17,817 INFO L225 Difference]: With dead ends: 47 [2021-05-06 10:11:17,817 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 10:11:17,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:11:17,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 10:11:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-05-06 10:11:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:11:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-06 10:11:17,821 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 37 [2021-05-06 10:11:17,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:11:17,821 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-06 10:11:17,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 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 10:11:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-06 10:11:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 10:11:17,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:11:17,822 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:11:18,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:11:18,044 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:11:18,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:11:18,045 INFO L82 PathProgramCache]: Analyzing trace with hash -209104877, now seen corresponding path program 1 times [2021-05-06 10:11:18,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:11:18,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226544326] [2021-05-06 10:11:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:11:18,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:11:18,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599584381] [2021-05-06 10:11:18,054 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 10:11:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:11:18,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 10:11:18,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:11:18,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 10:11:18,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:11:18,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226544326] [2021-05-06 10:11:18,328 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:11:18,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599584381] [2021-05-06 10:11:18,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599584381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:11:18,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:11:18,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:11:18,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310937710] [2021-05-06 10:11:18,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:11:18,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:11:18,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:11:18,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:11:18,329 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 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 10:11:18,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:11:18,432 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-05-06 10:11:18,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:11:18,432 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 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 10:11:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:11:18,434 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:11:18,434 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 10:11:18,434 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:11:18,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 10:11:18,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-05-06 10:11:18,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:11:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-05-06 10:11:18,438 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 37 [2021-05-06 10:11:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:11:18,438 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-05-06 10:11:18,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 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 10:11:18,438 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-05-06 10:11:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 10:11:18,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:11:18,439 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:11:18,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:11:18,655 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:11:18,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:11:18,656 INFO L82 PathProgramCache]: Analyzing trace with hash -266261558, now seen corresponding path program 1 times [2021-05-06 10:11:18,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:11:18,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133528284] [2021-05-06 10:11:18,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:11:18,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:11:18,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127771536] [2021-05-06 10:11:18,663 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 10:11:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:11:18,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 10:11:18,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:11:18,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:11:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 10:11:18,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:11:18,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133528284] [2021-05-06 10:11:18,855 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:11:18,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127771536] [2021-05-06 10:11:18,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127771536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:11:18,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:11:18,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:11:18,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233744134] [2021-05-06 10:11:18,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:11:18,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:11:18,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:11:18,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:11:18,857 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 10:15:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:15:32,761 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-05-06 10:15:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:15:32,762 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2021-05-06 10:15:32,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:15:32,763 INFO L225 Difference]: With dead ends: 55 [2021-05-06 10:15:32,763 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 10:15:32,763 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:15:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 10:15:32,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-05-06 10:15:32,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:15:32,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-05-06 10:15:32,766 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 43 [2021-05-06 10:15:32,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:15:32,766 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-05-06 10:15:32,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 10:15:32,766 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-05-06 10:15:32,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 10:15:32,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:15:32,767 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:15:32,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:15:32,978 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:15:32,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:15:32,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2054259256, now seen corresponding path program 2 times [2021-05-06 10:15:32,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:15:32,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189705734] [2021-05-06 10:15:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:15:32,989 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:15:32,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375384350] [2021-05-06 10:15:32,989 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 10:15:33,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:15:33,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:15:33,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 10:15:33,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:15:33,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:33,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:34,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:34,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:34,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:34,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:34,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:34,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:34,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:34,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:34,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:34,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:34,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:34,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:34,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:34,679 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 1034 DAG size of output: 718 [2021-05-06 10:15:34,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:35,269 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 1945 DAG size of output: 1401 [2021-05-06 10:15:35,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:46,277 WARN L205 SmtUtils]: Spent 10.54 s on a formula simplification. DAG size of input: 8269 DAG size of output: 7975 [2021-05-06 10:15:46,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:15:48,641 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 4159 DAG size of output: 3895