/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/hard-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:50:30,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:50:30,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:50:30,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:50:30,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:50:30,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:50:30,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:50:30,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:50:30,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:50:30,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:50:30,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:50:30,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-06 08:50:30,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:50:30,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:50:30,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:50:30,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:50:30,656 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:50:30,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:50:30,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:50:30,658 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:50:30,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:50:30,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:50:30,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:50:30,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:50:30,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:50:30,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:50:30,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:50:30,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:50:30,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:50:30,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:50:30,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:50:30,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:50:30,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:50:30,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:50:30,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:50:30,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:50:30,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:50:30,662 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:50:30,662 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:50:30,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:50:30,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:50:31,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:50:31,002 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:50:31,003 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:50:31,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c [2021-05-06 08:50:31,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a36546371/6938dad81d474c84bac5d1a252b2f894/FLAG6fb3f7dda [2021-05-06 08:50:31,509 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:50:31,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c [2021-05-06 08:50:31,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a36546371/6938dad81d474c84bac5d1a252b2f894/FLAG6fb3f7dda [2021-05-06 08:50:31,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a36546371/6938dad81d474c84bac5d1a252b2f894 [2021-05-06 08:50:31,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:50:31,538 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:50:31,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:50:31,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:50:31,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:50:31,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:50:31" (1/1) ... [2021-05-06 08:50:31,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d37f7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:50:31, skipping insertion in model container [2021-05-06 08:50:31,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:50:31" (1/1) ... [2021-05-06 08:50:31,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:50:31,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:50:31,679 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/hard-ll_valuebound1.c[546,559] [2021-05-06 08:50:31,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:50:31,711 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:50:31,726 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/hard-ll_valuebound1.c[546,559] [2021-05-06 08:50:31,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:50:31,788 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:50:31,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:50:31 WrapperNode [2021-05-06 08:50:31,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:50:31,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:50:31,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:50:31,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:50:31,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:50:31" (1/1) ... [2021-05-06 08:50:31,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:50:31" (1/1) ... [2021-05-06 08:50:31,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:50:31" (1/1) ... [2021-05-06 08:50:31,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:50:31" (1/1) ... [2021-05-06 08:50:31,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:50:31" (1/1) ... [2021-05-06 08:50:31,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:50:31" (1/1) ... [2021-05-06 08:50:31,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:50:31" (1/1) ... [2021-05-06 08:50:31,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:50:31,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:50:31,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:50:31,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:50:31,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:50:31" (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 08:50:31,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:50:31,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:50:31,916 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:50:31,917 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:50:31,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:50:31,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:50:31,917 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:50:31,917 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:50:31,917 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:50:31,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:50:31,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 08:50:31,918 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:50:31,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:50:31,919 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:50:31,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:50:31,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:50:31,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:50:31,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:50:31,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:50:31,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:50:32,214 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:50:32,214 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:50:32,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:50:32 BoogieIcfgContainer [2021-05-06 08:50:32,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:50:32,216 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:50:32,216 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:50:32,217 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:50:32,219 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:50:32" (1/1) ... [2021-05-06 08:50:32,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:50:32 BasicIcfg [2021-05-06 08:50:32,249 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:50:32,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:50:32,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:50:32,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:50:32,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:50:31" (1/4) ... [2021-05-06 08:50:32,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707eaba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:50:32, skipping insertion in model container [2021-05-06 08:50:32,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:50:31" (2/4) ... [2021-05-06 08:50:32,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707eaba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:50:32, skipping insertion in model container [2021-05-06 08:50:32,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:50:32" (3/4) ... [2021-05-06 08:50:32,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707eaba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:50:32, skipping insertion in model container [2021-05-06 08:50:32,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:50:32" (4/4) ... [2021-05-06 08:50:32,255 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound1.cJordan [2021-05-06 08:50:32,259 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:50:32,263 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:50:32,277 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:50:32,293 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:50:32,294 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:50:32,294 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:50:32,294 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:50:32,294 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:50:32,294 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:50:32,294 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:50:32,294 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:50:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:50:32,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:50:32,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:32,313 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 08:50:32,313 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:32,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:32,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-06 08:50:32,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:32,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871781476] [2021-05-06 08:50:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:32,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:50:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:32,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:50:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:32,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:50:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:32,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:50:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:32,628 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 08:50:32,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:32,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871781476] [2021-05-06 08:50:32,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871781476] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:50:32,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:50:32,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:50:32,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535242434] [2021-05-06 08:50:32,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:50:32,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:32,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:50:32,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:50:32,651 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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 08:50:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:32,850 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 08:50:32,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:50:32,852 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 08:50:32,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:32,858 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:50:32,858 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:50:32,860 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:50:32,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:50:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 08:50:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:50:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 08:50:32,898 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 08:50:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:32,899 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 08:50:32,899 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 08:50:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 08:50:32,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:50:32,901 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:32,901 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 08:50:32,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:50:32,902 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:32,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-06 08:50:32,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:32,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552680847] [2021-05-06 08:50:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:33,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:50:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:33,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:50:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:33,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:50:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:33,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:50:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:33,101 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 08:50:33,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:33,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552680847] [2021-05-06 08:50:33,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552680847] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:50:33,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:50:33,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:50:33,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828115480] [2021-05-06 08:50:33,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:50:33,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:33,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:50:33,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:50:33,105 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 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 08:50:33,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:33,453 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-06 08:50:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:50:33,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 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 08:50:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:33,456 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:50:33,456 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:50:33,457 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:50:33,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:50:33,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 08:50:33,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:50:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 08:50:33,476 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 08:50:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:33,477 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 08:50:33,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 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 08:50:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 08:50:33,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:50:33,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:33,478 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] [2021-05-06 08:50:33,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:50:33,478 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:33,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:33,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-06 08:50:33,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:33,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372289498] [2021-05-06 08:50:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:33,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:50:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:33,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:50:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:33,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:50:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:33,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:50:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:33,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 08:50:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:50:33,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:33,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372289498] [2021-05-06 08:50:33,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372289498] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:50:33,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:50:33,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:50:33,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847472242] [2021-05-06 08:50:33,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:50:33,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:33,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:50:33,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:50:33,587 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:50:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:33,947 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 08:50:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:50:33,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:50:33,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:33,950 INFO L225 Difference]: With dead ends: 48 [2021-05-06 08:50:33,950 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 08:50:33,950 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:50:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 08:50:33,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 08:50:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:50:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 08:50:33,963 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 08:50:33,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:33,963 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 08:50:33,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:50:33,964 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 08:50:33,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:50:33,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:33,965 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 08:50:33,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 08:50:33,966 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:33,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:33,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-06 08:50:33,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:33,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009038202] [2021-05-06 08:50:33,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:33,982 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:33,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997803669] [2021-05-06 08:50:33,982 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 08:50:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:34,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:50:34,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:34,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:34,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:34,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:34,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:34,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:34,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:34,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:34,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:34,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 08:50:34,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:34,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009038202] [2021-05-06 08:50:34,428 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:34,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997803669] [2021-05-06 08:50:34,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997803669] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:50:34,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:50:34,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 08:50:34,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938172652] [2021-05-06 08:50:34,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:50:34,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:34,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:50:34,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:50:34,431 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:50:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:34,582 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-05-06 08:50:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:50:34,583 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 08:50:34,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:34,585 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:50:34,585 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 08:50:34,585 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:50:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 08:50:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 08:50:34,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:50:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 08:50:34,594 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-06 08:50:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:34,594 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 08:50:34,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:50:34,595 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 08:50:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 08:50:34,597 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:34,597 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:34,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:34,822 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:34,823 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-06 08:50:34,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:34,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966935880] [2021-05-06 08:50:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:34,832 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:34,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774088638] [2021-05-06 08:50:34,832 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 08:50:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:34,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:50:34,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:34,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:34,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:34,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 08:50:35,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:35,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966935880] [2021-05-06 08:50:35,121 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:35,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774088638] [2021-05-06 08:50:35,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774088638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:35,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:35,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:50:35,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858715860] [2021-05-06 08:50:35,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:50:35,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:35,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:50:35,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:50:35,124 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:50:35,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:35,307 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-05-06 08:50:35,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:50:35,308 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 08:50:35,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:35,309 INFO L225 Difference]: With dead ends: 67 [2021-05-06 08:50:35,309 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:50:35,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:50:35,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:50:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 08:50:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:50:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 08:50:35,314 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-06 08:50:35,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:35,314 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 08:50:35,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:50:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 08:50:35,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:50:35,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:35,315 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1] [2021-05-06 08:50:35,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:35,527 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:35,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-06 08:50:35,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:35,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097086482] [2021-05-06 08:50:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:35,536 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:35,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695434144] [2021-05-06 08:50:35,536 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 08:50:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:35,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:50:35,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:35,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 08:50:35,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:35,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097086482] [2021-05-06 08:50:35,862 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:35,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695434144] [2021-05-06 08:50:35,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695434144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:35,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:35,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:50:35,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744949603] [2021-05-06 08:50:35,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:50:35,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:35,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:50:35,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:50:35,864 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:50:36,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:36,059 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2021-05-06 08:50:36,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:50:36,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 08:50:36,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:36,063 INFO L225 Difference]: With dead ends: 78 [2021-05-06 08:50:36,063 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 08:50:36,066 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:50:36,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 08:50:36,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 08:50:36,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:50:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2021-05-06 08:50:36,080 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 55 [2021-05-06 08:50:36,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:36,080 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2021-05-06 08:50:36,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:50:36,081 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2021-05-06 08:50:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 08:50:36,081 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:36,081 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:36,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:36,282 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:36,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:36,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1292294975, now seen corresponding path program 1 times [2021-05-06 08:50:36,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:36,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350647871] [2021-05-06 08:50:36,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:36,291 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:36,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230926656] [2021-05-06 08:50:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:50:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:36,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:50:36,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:36,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 08:50:36,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:36,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350647871] [2021-05-06 08:50:36,714 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:36,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230926656] [2021-05-06 08:50:36,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230926656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:36,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:36,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:50:36,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550699438] [2021-05-06 08:50:36,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:50:36,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:36,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:50:36,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:50:36,715 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:50:36,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:36,978 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2021-05-06 08:50:36,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:50:36,979 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), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-06 08:50:36,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:36,979 INFO L225 Difference]: With dead ends: 89 [2021-05-06 08:50:36,980 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 08:50:36,980 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:50:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 08:50:36,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 08:50:36,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:50:36,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-05-06 08:50:36,985 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 62 [2021-05-06 08:50:36,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:36,986 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-05-06 08:50:36,986 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), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:50:36,986 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-05-06 08:50:36,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 08:50:36,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:36,987 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:37,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:37,201 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-06 08:50:37,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:37,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958398215] [2021-05-06 08:50:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:37,213 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:37,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125088647] [2021-05-06 08:50:37,214 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 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 08:50:37,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:50:37,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:50:37,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:50:37,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:37,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-05-06 08:50:37,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:37,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958398215] [2021-05-06 08:50:37,577 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:37,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125088647] [2021-05-06 08:50:37,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125088647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:37,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:37,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:50:37,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458047520] [2021-05-06 08:50:37,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:50:37,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:37,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:50:37,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:50:37,579 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:50:37,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:37,689 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-05-06 08:50:37,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:50:37,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 72 [2021-05-06 08:50:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:37,692 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:50:37,692 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:50:37,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:50:37,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:50:37,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-06 08:50:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 08:50:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-05-06 08:50:37,701 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 72 [2021-05-06 08:50:37,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:37,701 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-05-06 08:50:37,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:50:37,701 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-05-06 08:50:37,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:50:37,703 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:37,703 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1] [2021-05-06 08:50:37,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:37,917 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:37,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:37,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2021-05-06 08:50:37,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:37,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169654229] [2021-05-06 08:50:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:37,924 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:37,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118269316] [2021-05-06 08:50:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:50:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:38,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 08:50:38,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:38,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-05-06 08:50:38,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:38,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169654229] [2021-05-06 08:50:38,506 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:38,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118269316] [2021-05-06 08:50:38,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118269316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:38,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:38,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:50:38,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566737650] [2021-05-06 08:50:38,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:50:38,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:38,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:50:38,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:50:38,508 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:50:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:38,770 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2021-05-06 08:50:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:50:38,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2021-05-06 08:50:38,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:38,772 INFO L225 Difference]: With dead ends: 77 [2021-05-06 08:50:38,772 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 08:50:38,772 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:50:38,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 08:50:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 08:50:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 47 states have (on average 1.0) internal successors, (47), 47 states have internal predecessors, (47), 16 states have call successors, (16), 13 states have call predecessors, (16), 11 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 08:50:38,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-05-06 08:50:38,781 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 75 [2021-05-06 08:50:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:38,782 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-05-06 08:50:38,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:50:38,782 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-05-06 08:50:38,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:50:38,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:38,786 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2021-05-06 08:50:39,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:39,001 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:39,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:39,001 INFO L82 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2021-05-06 08:50:39,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:39,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195279084] [2021-05-06 08:50:39,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:39,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:39,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396211158] [2021-05-06 08:50:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:39,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:50:39,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:39,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:39,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:40,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:40,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:40,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:40,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:40,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:40,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:40,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:40,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:40,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:40,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:40,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:40,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:41,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:42,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:42,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:42,049 WARN L159 QuantifierPusher]: Ignoring assumption.