/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-u_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:07:23,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:07:23,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:07:23,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 09:07:23,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:07:23,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:07:23,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:07:23,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:07:23,762 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:07:23,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:07:23,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:07:23,764 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:07:23,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:07:23,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:07:23,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:07:23,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:07:23,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:07:23,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:07:23,765 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:07:23,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:07:23,766 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:07:23,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:07:23,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:07:23,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:07:23,766 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:07:23,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:07:23,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:07:23,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:07:23,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:07:23,767 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:07:23,767 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:07:24,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:07:24,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:07:24,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:07:24,119 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:07:24,120 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:07:24,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound100.c [2021-05-06 09:07:24,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c9dccc8/9a14358434ef49759865277129b898ba/FLAG620545f40 [2021-05-06 09:07:24,594 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:07:24,595 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound100.c [2021-05-06 09:07:24,601 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c9dccc8/9a14358434ef49759865277129b898ba/FLAG620545f40 [2021-05-06 09:07:24,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c9dccc8/9a14358434ef49759865277129b898ba [2021-05-06 09:07:24,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:07:24,627 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:07:24,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:07:24,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:07:24,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:07:24,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:07:24" (1/1) ... [2021-05-06 09:07:24,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78baaf1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:24, skipping insertion in model container [2021-05-06 09:07:24,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:07:24" (1/1) ... [2021-05-06 09:07:24,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:07:24,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:07:24,787 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-u_valuebound100.c[545,558] [2021-05-06 09:07:24,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:07:24,817 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:07:24,876 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-u_valuebound100.c[545,558] [2021-05-06 09:07:24,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:07:24,902 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:07:24,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:24 WrapperNode [2021-05-06 09:07:24,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:07:24,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:07:24,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:07:24,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:07:24,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:24" (1/1) ... [2021-05-06 09:07:24,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:24" (1/1) ... [2021-05-06 09:07:24,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:24" (1/1) ... [2021-05-06 09:07:24,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:24" (1/1) ... [2021-05-06 09:07:24,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:24" (1/1) ... [2021-05-06 09:07:24,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:24" (1/1) ... [2021-05-06 09:07:24,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:24" (1/1) ... [2021-05-06 09:07:24,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:07:24,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:07:24,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:07:24,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:07:24,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:24" (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 09:07:25,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:07:25,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:07:25,018 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:07:25,018 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:07:25,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:07:25,018 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:07:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:07:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:07:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:07:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:07:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 09:07:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:07:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:07:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:07:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:07:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:07:25,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:07:25,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:07:25,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:07:25,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:07:25,299 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:07:25,299 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:07:25,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:07:25 BoogieIcfgContainer [2021-05-06 09:07:25,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:07:25,317 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:07:25,317 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:07:25,318 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:07:25,320 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:07:25" (1/1) ... [2021-05-06 09:07:25,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:07:25 BasicIcfg [2021-05-06 09:07:25,346 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:07:25,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:07:25,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:07:25,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:07:25,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:07:24" (1/4) ... [2021-05-06 09:07:25,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f97a34b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:07:25, skipping insertion in model container [2021-05-06 09:07:25,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:24" (2/4) ... [2021-05-06 09:07:25,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f97a34b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:07:25, skipping insertion in model container [2021-05-06 09:07:25,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:07:25" (3/4) ... [2021-05-06 09:07:25,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f97a34b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:07:25, skipping insertion in model container [2021-05-06 09:07:25,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:07:25" (4/4) ... [2021-05-06 09:07:25,351 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound100.cJordan [2021-05-06 09:07:25,371 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:07:25,374 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:07:25,404 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:07:25,430 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:07:25,430 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:07:25,431 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:07:25,431 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:07:25,431 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:07:25,431 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:07:25,431 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:07:25,431 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:07:25,450 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 09:07:25,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:07:25,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:25,459 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 09:07:25,460 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:25,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:25,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-06 09:07:25,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:25,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431959142] [2021-05-06 09:07:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:25,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:07:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:25,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:07:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:25,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:07:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:25,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:07:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:25,652 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 09:07:25,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:25,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431959142] [2021-05-06 09:07:25,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431959142] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:07:25,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:07:25,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:07:25,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165008877] [2021-05-06 09:07:25,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:07:25,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:25,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:07:25,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:07:25,669 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 09:07:25,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:25,769 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 09:07:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:07:25,771 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 09:07:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:25,775 INFO L225 Difference]: With dead ends: 38 [2021-05-06 09:07:25,776 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 09:07:25,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:07:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 09:07:25,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 09:07:25,802 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 09:07:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 09:07:25,804 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 09:07:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:25,805 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 09:07:25,805 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 09:07:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 09:07:25,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:07:25,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:25,806 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 09:07:25,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:07:25,807 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:25,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:25,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-06 09:07:25,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:25,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018781199] [2021-05-06 09:07:25,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:25,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:07:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:25,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:07:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:25,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:07:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:25,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:07:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:25,939 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 09:07:25,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:25,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018781199] [2021-05-06 09:07:25,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018781199] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:07:25,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:07:25,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:07:25,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758182528] [2021-05-06 09:07:25,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:07:25,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:25,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:07:25,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:07:25,942 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 09:07:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:26,218 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-06 09:07:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:07:26,219 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 09:07:26,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:26,221 INFO L225 Difference]: With dead ends: 44 [2021-05-06 09:07:26,221 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 09:07:26,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:07:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 09:07:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 09:07:26,237 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 09:07:26,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 09:07:26,244 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 09:07:26,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:26,245 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 09:07:26,245 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 09:07:26,245 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 09:07:26,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 09:07:26,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:26,246 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 09:07:26,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:07:26,246 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:26,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:26,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-06 09:07:26,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:26,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785373783] [2021-05-06 09:07:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:26,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:07:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:26,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:07:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:26,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:07:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:26,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:07:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:26,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 09:07:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:26,532 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 09:07:26,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:26,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785373783] [2021-05-06 09:07:26,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785373783] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:07:26,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:07:26,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:07:26,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346621763] [2021-05-06 09:07:26,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:07:26,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:26,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:07:26,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:07:26,534 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 09:07:26,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:26,788 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 09:07:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:07:26,788 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 09:07:26,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:26,789 INFO L225 Difference]: With dead ends: 48 [2021-05-06 09:07:26,789 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 09:07:26,789 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:07:26,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 09:07:26,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 09:07:26,793 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 09:07:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 09:07:26,793 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 09:07:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:26,794 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 09:07:26,794 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 09:07:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 09:07:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 09:07:26,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:26,795 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 09:07:26,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:07:26,795 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:26,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:26,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-06 09:07:26,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:26,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489300599] [2021-05-06 09:07:26,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:26,805 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:07:26,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575529625] [2021-05-06 09:07:26,806 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 09:07:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:27,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 09:07:27,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:07:27,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:27,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:27,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:27,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:27,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:27,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:27,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:27,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:27,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 09:07:27,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:27,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489300599] [2021-05-06 09:07:27,145 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:07:27,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575529625] [2021-05-06 09:07:27,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575529625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:07:27,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:07:27,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:07:27,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360631078] [2021-05-06 09:07:27,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:07:27,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:27,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:07:27,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:07:27,146 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 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), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 09:07:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:29,434 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-05-06 09:07:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:07:29,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 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), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 09:07:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:29,435 INFO L225 Difference]: With dead ends: 62 [2021-05-06 09:07:29,435 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 09:07:29,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:07:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 09:07:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 09:07:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 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 09:07:29,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-05-06 09:07:29,440 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2021-05-06 09:07:29,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:29,440 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-05-06 09:07:29,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 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), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 09:07:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-05-06 09:07:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 09:07:29,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:29,441 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 09:07:29,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:07:29,653 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:29,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:29,654 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-06 09:07:29,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:29,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554546022] [2021-05-06 09:07:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:29,670 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:07:29,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021836864] [2021-05-06 09:07:29,671 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 09:07:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:29,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 09:07:29,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:07:29,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:29,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:29,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:29,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:29,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:29,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:29,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:29,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:29,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:29,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,025 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 09:07:30,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:30,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554546022] [2021-05-06 09:07:30,026 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:07:30,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021836864] [2021-05-06 09:07:30,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021836864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:07:30,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:07:30,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:07:30,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495219404] [2021-05-06 09:07:30,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:07:30,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:30,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:07:30,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:07:30,027 INFO L87 Difference]: Start difference. First operand 55 states and 69 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 09:07:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:30,237 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-05-06 09:07:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:07:30,238 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 09:07:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:30,240 INFO L225 Difference]: With dead ends: 74 [2021-05-06 09:07:30,240 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 09:07:30,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:07:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 09:07:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-06 09:07:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 09:07:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-05-06 09:07:30,246 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 45 [2021-05-06 09:07:30,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:30,246 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-05-06 09:07:30,246 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 09:07:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-05-06 09:07:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 09:07:30,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:30,248 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 09:07:30,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:07:30,461 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:30,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:30,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-06 09:07:30,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:30,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503364864] [2021-05-06 09:07:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:30,469 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:07:30,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894177525] [2021-05-06 09:07:30,469 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 09:07:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:30,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 09:07:30,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:07:30,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-06 09:07:30,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:30,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503364864] [2021-05-06 09:07:30,929 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:07:30,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894177525] [2021-05-06 09:07:30,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894177525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:07:30,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:07:30,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 09:07:30,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514875112] [2021-05-06 09:07:30,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 09:07:30,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:30,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 09:07:30,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:07:30,931 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:07:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:35,925 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-05-06 09:07:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 09:07:35,926 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 09:07:35,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:35,927 INFO L225 Difference]: With dead ends: 91 [2021-05-06 09:07:35,927 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 09:07:35,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-06 09:07:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 09:07:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-06 09:07:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 49 states have (on average 1.163265306122449) internal successors, (57), 51 states have internal predecessors, (57), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 09:07:35,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-05-06 09:07:35,933 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 55 [2021-05-06 09:07:35,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:35,934 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-05-06 09:07:35,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:07:35,934 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-05-06 09:07:35,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 09:07:35,934 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:35,934 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:07:36,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:07:36,141 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:36,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:36,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1535015126, now seen corresponding path program 1 times [2021-05-06 09:07:36,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:36,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744035873] [2021-05-06 09:07:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:36,154 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:07:36,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157899472] [2021-05-06 09:07:36,154 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