/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/cohendiv-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:40:23,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:40:23,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:40:23,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:40:23,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:40:23,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:40:23,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:40:23,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:40:23,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:40:23,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:40:23,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:40:23,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:40:23,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:40:23,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:40:23,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:40:23,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:40:23,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:40:23,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:40:23,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:40:23,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:40:23,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:40:23,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:40:23,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:40:23,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:40:23,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:40:23,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:40:23,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:40:23,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:40:23,303 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:40:23,317 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:40:23,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:40:23,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:40:23,318 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:40:23,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:40:23,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:40:23,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:40:23,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:40:23,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:40:23,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:40:23,319 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:40:23,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:40:23,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:40:23,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:40:23,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:40:23,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:40:23,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:40:23,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:40:23,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:40:23,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:40:23,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:40:23,321 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:40:23,321 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:40:23,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:40:23,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:40:23,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:40:23,626 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:40:23,626 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:40:23,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound1.c [2021-05-02 19:40:23,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c81408e53/c57f7833a93a481b9c0af15976429e50/FLAGb9a2a497d [2021-05-02 19:40:24,054 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:40:24,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound1.c [2021-05-02 19:40:24,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c81408e53/c57f7833a93a481b9c0af15976429e50/FLAGb9a2a497d [2021-05-02 19:40:24,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c81408e53/c57f7833a93a481b9c0af15976429e50 [2021-05-02 19:40:24,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:40:24,464 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:40:24,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:40:24,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:40:24,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:40:24,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:40:24" (1/1) ... [2021-05-02 19:40:24,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d854778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:24, skipping insertion in model container [2021-05-02 19:40:24,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:40:24" (1/1) ... [2021-05-02 19:40:24,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:40:24,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:40:24,591 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/cohendiv-ll_unwindbound1.c[576,589] [2021-05-02 19:40:24,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:40:24,610 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:40:24,645 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/cohendiv-ll_unwindbound1.c[576,589] [2021-05-02 19:40:24,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:40:24,683 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:40:24,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:24 WrapperNode [2021-05-02 19:40:24,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:40:24,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:40:24,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:40:24,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:40:24,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:24" (1/1) ... [2021-05-02 19:40:24,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:24" (1/1) ... [2021-05-02 19:40:24,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:24" (1/1) ... [2021-05-02 19:40:24,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:24" (1/1) ... [2021-05-02 19:40:24,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:24" (1/1) ... [2021-05-02 19:40:24,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:24" (1/1) ... [2021-05-02 19:40:24,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:24" (1/1) ... [2021-05-02 19:40:24,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:40:24,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:40:24,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:40:24,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:40:24,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:24" (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 [2021-05-02 19:40:24,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:40:24,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:40:24,787 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:40:24,787 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:40:24,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:40:24,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:40:24,787 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:40:24,788 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:40:24,788 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:40:24,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:40:24,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:40:24,788 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:40:24,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:40:24,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:40:24,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:40:24,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:40:24,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:40:24,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:40:24,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:40:24,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:40:25,122 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:40:25,122 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 19:40:25,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:40:25 BoogieIcfgContainer [2021-05-02 19:40:25,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:40:25,124 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:40:25,124 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:40:25,125 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:40:25,127 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:40:25" (1/1) ... [2021-05-02 19:40:25,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:40:25 BasicIcfg [2021-05-02 19:40:25,140 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:40:25,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:40:25,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:40:25,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:40:25,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:40:24" (1/4) ... [2021-05-02 19:40:25,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b81b860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:40:25, skipping insertion in model container [2021-05-02 19:40:25,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:24" (2/4) ... [2021-05-02 19:40:25,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b81b860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:40:25, skipping insertion in model container [2021-05-02 19:40:25,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:40:25" (3/4) ... [2021-05-02 19:40:25,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b81b860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:40:25, skipping insertion in model container [2021-05-02 19:40:25,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:40:25" (4/4) ... [2021-05-02 19:40:25,147 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound1.cJordan [2021-05-02 19:40:25,151 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:40:25,154 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:40:25,167 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:40:25,181 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:40:25,182 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:40:25,182 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:40:25,182 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:40:25,182 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:40:25,182 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:40:25,182 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:40:25,182 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:40:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 19:40:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:40:25,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:25,208 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:25,209 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:25,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2021-05-02 19:40:25,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:25,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435169345] [2021-05-02 19:40:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:25,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:40:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:25,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:40:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:25,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:25,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435169345] [2021-05-02 19:40:25,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435169345] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:25,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:25,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:40:25,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185003713] [2021-05-02 19:40:25,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:40:25,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:25,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:40:25,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:40:25,410 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:25,525 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-02 19:40:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:40:25,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 19:40:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:25,533 INFO L225 Difference]: With dead ends: 39 [2021-05-02 19:40:25,534 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 19:40:25,535 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:40:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 19:40:25,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 19:40:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:40:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-02 19:40:25,564 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-02 19:40:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:25,564 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-02 19:40:25,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-02 19:40:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:40:25,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:25,565 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:25,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:40:25,566 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:25,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2021-05-02 19:40:25,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:25,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733248549] [2021-05-02 19:40:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:25,583 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:25,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380779792] [2021-05-02 19:40:25,583 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 [2021-05-02 19:40:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:25,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 19:40:25,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:25,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:25,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:25,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:25,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:25,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:25,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:25,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733248549] [2021-05-02 19:40:25,807 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:25,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380779792] [2021-05-02 19:40:25,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380779792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:25,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:25,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:40:25,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761072980] [2021-05-02 19:40:25,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:40:25,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:25,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:40:25,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:40:25,811 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:40:25,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:25,828 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-02 19:40:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:40:25,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 19:40:25,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:25,830 INFO L225 Difference]: With dead ends: 35 [2021-05-02 19:40:25,831 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 19:40:25,832 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:40:25,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 19:40:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 19:40:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:40:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 19:40:25,850 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-02 19:40:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:25,851 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 19:40:25,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:40:25,852 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 19:40:25,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:40:25,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:25,856 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:26,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:40:26,077 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:26,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2021-05-02 19:40:26,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:26,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493901615] [2021-05-02 19:40:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:26,091 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:26,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101848700] [2021-05-02 19:40:26,091 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 [2021-05-02 19:40:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:26,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:40:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:26,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:26,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:26,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:26,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493901615] [2021-05-02 19:40:26,260 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:26,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101848700] [2021-05-02 19:40:26,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101848700] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:26,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:26,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:40:26,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679472360] [2021-05-02 19:40:26,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:26,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:26,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:26,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:26,262 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:26,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:26,352 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-02 19:40:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:40:26,353 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 19:40:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:26,355 INFO L225 Difference]: With dead ends: 43 [2021-05-02 19:40:26,356 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 19:40:26,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 19:40:26,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 19:40:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:40:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 19:40:26,369 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-02 19:40:26,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:26,369 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 19:40:26,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 19:40:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:40:26,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:26,371 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:26,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:26,585 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:26,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:26,586 INFO L82 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2021-05-02 19:40:26,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:26,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909245199] [2021-05-02 19:40:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:26,611 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:26,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534700886] [2021-05-02 19:40:26,611 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 [2021-05-02 19:40:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:26,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:40:26,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:26,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:26,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:26,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:26,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:26,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:26,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909245199] [2021-05-02 19:40:26,875 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:26,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534700886] [2021-05-02 19:40:26,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534700886] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:26,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:26,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:40:26,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195101133] [2021-05-02 19:40:26,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:26,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:26,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:26,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:26,877 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:40:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:26,990 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-02 19:40:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:40:26,990 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 19:40:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:26,993 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:40:26,993 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 19:40:26,996 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:26,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 19:40:27,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 19:40:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 19:40:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-02 19:40:27,010 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-02 19:40:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:27,010 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-02 19:40:27,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:40:27,010 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-02 19:40:27,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 19:40:27,012 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:27,012 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 19:40:27,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:27,235 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:27,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:27,235 INFO L82 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2021-05-02 19:40:27,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:27,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484099005] [2021-05-02 19:40:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:27,246 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:27,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113458470] [2021-05-02 19:40:27,246 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 [2021-05-02 19:40:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:27,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:40:27,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:27,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:40:27,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:27,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484099005] [2021-05-02 19:40:27,388 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:27,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113458470] [2021-05-02 19:40:27,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113458470] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:27,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:27,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 19:40:27,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751877774] [2021-05-02 19:40:27,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:40:27,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:27,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:40:27,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:40:27,390 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:40:27,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:27,418 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-02 19:40:27,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:40:27,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-02 19:40:27,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:27,420 INFO L225 Difference]: With dead ends: 42 [2021-05-02 19:40:27,420 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 19:40:27,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:40:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 19:40:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 19:40:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:40:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-05-02 19:40:27,423 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 31 [2021-05-02 19:40:27,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:27,424 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-05-02 19:40:27,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:40:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-05-02 19:40:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 19:40:27,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:27,425 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:27,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:27,651 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:27,652 INFO L82 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2021-05-02 19:40:27,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:27,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652097070] [2021-05-02 19:40:27,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:27,662 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:27,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256581670] [2021-05-02 19:40:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:27,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 19:40:27,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:27,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:40:27,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:27,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652097070] [2021-05-02 19:40:27,853 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:27,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256581670] [2021-05-02 19:40:27,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256581670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:27,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:27,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:40:27,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018038007] [2021-05-02 19:40:27,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:40:27,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:27,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:40:27,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:27,854 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:40:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:27,939 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-05-02 19:40:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:40:27,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-05-02 19:40:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:27,941 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:40:27,941 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 19:40:27,941 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:40:27,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 19:40:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-05-02 19:40:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:40:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-05-02 19:40:27,945 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34 [2021-05-02 19:40:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:27,945 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-05-02 19:40:27,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:40:27,945 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-05-02 19:40:27,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 19:40:27,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:27,946 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:28,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:40:28,167 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash -829054625, now seen corresponding path program 1 times [2021-05-02 19:40:28,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:28,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959043834] [2021-05-02 19:40:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:28,175 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:28,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104509940] [2021-05-02 19:40:28,175 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 [2021-05-02 19:40:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:28,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 19:40:28,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:28,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:28,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:28,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:28,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:40:28,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:28,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959043834] [2021-05-02 19:40:28,329 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:28,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104509940] [2021-05-02 19:40:28,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104509940] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:28,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:28,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 19:40:28,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576982438] [2021-05-02 19:40:28,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:40:28,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:28,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:40:28,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:40:28,331 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 19:40:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:28,355 INFO L93 Difference]: Finished difference Result 30 states and 29 transitions. [2021-05-02 19:40:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:40:28,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2021-05-02 19:40:28,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:28,356 INFO L225 Difference]: With dead ends: 30 [2021-05-02 19:40:28,356 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:40:28,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:40:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:40:28,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:40:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:40:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:40:28,357 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2021-05-02 19:40:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:28,357 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:40:28,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 19:40:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:40:28,358 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:40:28,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:28,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:40:28 BasicIcfg [2021-05-02 19:40:28,583 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:40:28,584 INFO L168 Benchmark]: Toolchain (without parser) took 4121.07 ms. Allocated memory was 189.8 MB in the beginning and 239.1 MB in the end (delta: 49.3 MB). Free memory was 154.2 MB in the beginning and 170.0 MB in the end (delta: -15.7 MB). Peak memory consumption was 34.4 MB. Max. memory is 8.0 GB. [2021-05-02 19:40:28,584 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 189.8 MB. Free memory is still 170.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:40:28,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.78 ms. Allocated memory is still 189.8 MB. Free memory was 154.1 MB in the beginning and 172.1 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:40:28,584 INFO L168 Benchmark]: Boogie Preprocessor took 38.10 ms. Allocated memory is still 189.8 MB. Free memory was 172.1 MB in the beginning and 170.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:40:28,584 INFO L168 Benchmark]: RCFGBuilder took 398.09 ms. Allocated memory is still 189.8 MB. Free memory was 170.7 MB in the beginning and 154.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:40:28,584 INFO L168 Benchmark]: IcfgTransformer took 16.49 ms. Allocated memory is still 189.8 MB. Free memory was 154.6 MB in the beginning and 153.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:40:28,584 INFO L168 Benchmark]: TraceAbstraction took 3441.36 ms. Allocated memory was 189.8 MB in the beginning and 239.1 MB in the end (delta: 49.3 MB). Free memory was 152.5 MB in the beginning and 170.0 MB in the end (delta: -17.5 MB). Peak memory consumption was 33.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:40:28,585 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 189.8 MB. Free memory is still 170.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 218.78 ms. Allocated memory is still 189.8 MB. Free memory was 154.1 MB in the beginning and 172.1 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.10 ms. Allocated memory is still 189.8 MB. Free memory was 172.1 MB in the beginning and 170.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 398.09 ms. Allocated memory is still 189.8 MB. Free memory was 170.7 MB in the beginning and 154.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.49 ms. Allocated memory is still 189.8 MB. Free memory was 154.6 MB in the beginning and 153.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3441.36 ms. Allocated memory was 189.8 MB in the beginning and 239.1 MB in the end (delta: 49.3 MB). Free memory was 152.5 MB in the beginning and 170.0 MB in the end (delta: -17.5 MB). Peak memory consumption was 33.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3400.6ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 26.2ms, AutomataDifference: 515.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 246 SDtfs, 110 SDslu, 703 SDs, 0 SdLazy, 293 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 293.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 167 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 250.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=4, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 69.6ms AutomataMinimizationTime, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 68.0ms SsaConstructionTime, 174.8ms SatisfiabilityAnalysisTime, 818.3ms InterpolantComputationTime, 175 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 168 ConstructedInterpolants, 0 QuantifiedInterpolants, 513 SizeOfPredicates, 11 NumberOfNonLiveVariables, 831 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 7 InterpolantComputations, 6 PerfectInterpolantSequences, 29/31 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...