/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/ps6-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:45:23,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:45:23,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:45:23,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:45:23,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:45:23,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:45:23,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:45:23,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:45:23,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:45:23,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:45:23,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:45:23,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:45:23,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:45:23,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:45:23,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:45:23,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:45:23,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:45:23,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:45:23,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:45:23,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:45:23,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:45:23,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:45:23,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:45:23,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:45:23,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:45:23,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:45:23,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:45:23,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:45:23,818 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:45:23,839 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:45:23,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:45:23,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:45:23,841 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:45:23,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:45:23,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:45:23,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:45:23,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:45:23,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:45:23,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:45:23,841 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:45:23,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:45:23,842 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:45:23,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:45:23,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:45:23,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:45:23,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:45:23,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:45:23,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:45:23,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:45:23,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:45:23,843 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:45:23,843 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:45:24,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:45:24,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:45:24,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:45:24,115 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:45:24,116 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:45:24,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound2.c [2021-05-02 22:45:24,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea18484a5/14208ca7bdbe4ec1825e42550af0fac4/FLAG5c4ae1477 [2021-05-02 22:45:24,522 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:45:24,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound2.c [2021-05-02 22:45:24,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea18484a5/14208ca7bdbe4ec1825e42550af0fac4/FLAG5c4ae1477 [2021-05-02 22:45:24,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea18484a5/14208ca7bdbe4ec1825e42550af0fac4 [2021-05-02 22:45:24,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:45:24,540 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:45:24,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:45:24,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:45:24,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:45:24,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:45:24" (1/1) ... [2021-05-02 22:45:24,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3374651b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:45:24, skipping insertion in model container [2021-05-02 22:45:24,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:45:24" (1/1) ... [2021-05-02 22:45:24,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:45:24,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:45:24,670 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/ps6-ll_valuebound2.c[458,471] [2021-05-02 22:45:24,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:45:24,703 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:45:24,722 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/ps6-ll_valuebound2.c[458,471] [2021-05-02 22:45:24,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:45:24,753 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:45:24,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:45:24 WrapperNode [2021-05-02 22:45:24,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:45:24,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:45:24,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:45:24,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:45:24,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:45:24" (1/1) ... [2021-05-02 22:45:24,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:45:24" (1/1) ... [2021-05-02 22:45:24,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:45:24" (1/1) ... [2021-05-02 22:45:24,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:45:24" (1/1) ... [2021-05-02 22:45:24,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:45:24" (1/1) ... [2021-05-02 22:45:24,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:45:24" (1/1) ... [2021-05-02 22:45:24,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:45:24" (1/1) ... [2021-05-02 22:45:24,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:45:24,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:45:24,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:45:24,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:45:24,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:45:24" (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 22:45:24,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:45:24,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:45:24,866 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:45:24,866 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:45:24,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:45:24,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:45:24,866 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:45:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:45:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:45:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:45:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:45:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:45:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:45:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:45:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:45:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:45:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:45:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:45:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:45:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:45:25,109 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:45:25,109 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:45:25,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:45:25 BoogieIcfgContainer [2021-05-02 22:45:25,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:45:25,110 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:45:25,111 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:45:25,111 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:45:25,113 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:45:25" (1/1) ... [2021-05-02 22:45:25,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:45:25 BasicIcfg [2021-05-02 22:45:25,124 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:45:25,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:45:25,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:45:25,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:45:25,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:45:24" (1/4) ... [2021-05-02 22:45:25,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b40081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:45:25, skipping insertion in model container [2021-05-02 22:45:25,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:45:24" (2/4) ... [2021-05-02 22:45:25,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b40081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:45:25, skipping insertion in model container [2021-05-02 22:45:25,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:45:25" (3/4) ... [2021-05-02 22:45:25,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b40081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:45:25, skipping insertion in model container [2021-05-02 22:45:25,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:45:25" (4/4) ... [2021-05-02 22:45:25,138 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound2.cJordan [2021-05-02 22:45:25,142 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:45:25,144 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:45:25,155 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:45:25,168 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:45:25,168 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:45:25,168 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:45:25,168 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:45:25,168 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:45:25,168 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:45:25,169 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:45:25,169 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:45:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:45:25,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:45:25,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:45:25,183 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:45:25,184 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:45:25,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:45:25,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2021-05-02 22:45:25,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:45:25,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379699864] [2021-05-02 22:45:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:45:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:45:25,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:45:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:45:25,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:45:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:45:25,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 22:45:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:45:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 22:45:25,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:45:25,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379699864] [2021-05-02 22:45:25,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379699864] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:45:25,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:45:25,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:45:25,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361563785] [2021-05-02 22:45:25,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:45:25,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:45:25,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:45:25,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:45:25,381 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:45:27,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:45:27,560 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-02 22:45:27,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:45:27,561 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 22:45:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:45:27,567 INFO L225 Difference]: With dead ends: 29 [2021-05-02 22:45:27,567 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 22:45:27,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:45:27,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 22:45:27,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 22:45:27,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:45:27,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 22:45:27,626 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-02 22:45:27,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:45:27,626 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 22:45:27,626 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:45:27,627 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 22:45:27,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:45:27,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:45:27,628 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:45:27,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:45:27,629 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:45:27,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:45:27,630 INFO L82 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2021-05-02 22:45:27,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:45:27,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110665331] [2021-05-02 22:45:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:45:27,679 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:45:27,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208915091] [2021-05-02 22:45:27,680 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 22:45:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:45:27,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:45:27,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:45:27,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:45:27,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:45:27,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110665331] [2021-05-02 22:45:27,971 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:45:27,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208915091] [2021-05-02 22:45:27,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208915091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:45:27,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:45:27,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:45:27,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732909491] [2021-05-02 22:45:27,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:45:27,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:45:27,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:45:27,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:45:27,981 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 22:45:28,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:45:28,081 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-02 22:45:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:45:28,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-02 22:45:28,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:45:28,082 INFO L225 Difference]: With dead ends: 33 [2021-05-02 22:45:28,082 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 22:45:28,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:45:28,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 22:45:28,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 22:45:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:45:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-02 22:45:28,087 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-02 22:45:28,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:45:28,087 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-02 22:45:28,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 22:45:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-02 22:45:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 22:45:28,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:45:28,088 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:45:28,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:45:28,317 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:45:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:45:28,317 INFO L82 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2021-05-02 22:45:28,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:45:28,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384731647] [2021-05-02 22:45:28,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:45:28,327 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:45:28,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627871085] [2021-05-02 22:45:28,327 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 22:45:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:45:28,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:45:28,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:45:28,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:45:28,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:45:28,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384731647] [2021-05-02 22:45:28,536 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:45:28,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627871085] [2021-05-02 22:45:28,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627871085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:45:28,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:45:28,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:45:28,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999690956] [2021-05-02 22:45:28,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:45:28,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:45:28,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:45:28,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:45:28,537 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:45:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:45:28,637 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-02 22:45:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:45:28,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 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 29 [2021-05-02 22:45:28,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:45:28,640 INFO L225 Difference]: With dead ends: 40 [2021-05-02 22:45:28,640 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 22:45:28,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:45:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 22:45:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 22:45:28,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:45:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-02 22:45:28,653 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-02 22:45:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:45:28,653 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-02 22:45:28,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:45:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-02 22:45:28,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:45:28,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:45:28,657 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:45:28,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:45:28,863 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:45:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:45:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1813677706, now seen corresponding path program 2 times [2021-05-02 22:45:28,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:45:28,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159567172] [2021-05-02 22:45:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:45:28,886 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:45:28,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518402067] [2021-05-02 22:45:28,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:45:28,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:45:28,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:45:28,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 22:45:28,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:45:28,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:28,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:29,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:29,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:29,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:29,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:29,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:29,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:29,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 22:45:31,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:45:31,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159567172] [2021-05-02 22:45:31,253 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:45:31,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518402067] [2021-05-02 22:45:31,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518402067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:45:31,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:45:31,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 22:45:31,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747105109] [2021-05-02 22:45:31,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 22:45:31,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:45:31,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 22:45:31,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=108, Unknown=1, NotChecked=0, Total=132 [2021-05-02 22:45:31,255 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:45:35,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:45:35,484 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-02 22:45:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:45:35,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 22:45:35,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:45:35,486 INFO L225 Difference]: With dead ends: 53 [2021-05-02 22:45:35,486 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 22:45:35,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2147.3ms TimeCoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2021-05-02 22:45:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 22:45:35,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-02 22:45:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:45:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-05-02 22:45:35,491 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 36 [2021-05-02 22:45:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:45:35,492 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-05-02 22:45:35,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:45:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-05-02 22:45:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 22:45:35,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:45:35,493 INFO L523 BasicCegarLoop]: trace histogram [4, 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] [2021-05-02 22:45:35,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:45:35,699 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:45:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:45:35,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2021-05-02 22:45:35,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:45:35,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297168951] [2021-05-02 22:45:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:45:35,711 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:45:35,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231194172] [2021-05-02 22:45:35,712 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 22:45:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:45:35,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 22:45:35,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:45:35,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:35,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:35,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:35,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:35,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:35,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:35,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:35,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:35,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:35,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:35,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:35,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:35,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:35,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 22:45:35,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:45:35,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297168951] [2021-05-02 22:45:35,993 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:45:35,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231194172] [2021-05-02 22:45:35,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231194172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:45:35,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:45:35,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:45:35,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852879749] [2021-05-02 22:45:35,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:45:35,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:45:35,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:45:35,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:45:35,995 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 22:45:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:45:36,117 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-05-02 22:45:36,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 22:45:36,117 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2021-05-02 22:45:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:45:36,119 INFO L225 Difference]: With dead ends: 58 [2021-05-02 22:45:36,119 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:45:36,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:45:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:45:36,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 22:45:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:45:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 22:45:36,123 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-02 22:45:36,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:45:36,123 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 22:45:36,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 22:45:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 22:45:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 22:45:36,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:45:36,124 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:45:36,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:45:36,337 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:45:36,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:45:36,338 INFO L82 PathProgramCache]: Analyzing trace with hash -241657738, now seen corresponding path program 3 times [2021-05-02 22:45:36,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:45:36,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242426729] [2021-05-02 22:45:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:45:36,357 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:45:36,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568277197] [2021-05-02 22:45:36,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 22:45:36,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:45:36,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:45:36,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:45:36,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:45:38,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:38,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:45:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 22:45:38,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:45:38,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242426729] [2021-05-02 22:45:38,618 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:45:38,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568277197] [2021-05-02 22:45:38,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568277197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:45:38,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:45:38,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:45:38,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790623854] [2021-05-02 22:45:38,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:45:38,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:45:38,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:45:38,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=29, Unknown=1, NotChecked=0, Total=42 [2021-05-02 22:45:38,619 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 22:46:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:05,898 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-02 22:46:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:46:05,899 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-02 22:46:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:05,899 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:46:05,899 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:46:05,900 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2266.0ms TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2021-05-02 22:46:05,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:46:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-02 22:46:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:46:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 22:46:05,903 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-02 22:46:05,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:05,903 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 22:46:05,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 22:46:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 22:46:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 22:46:05,904 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:05,904 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:06,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 22:46:06,113 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:06,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:06,113 INFO L82 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2021-05-02 22:46:06,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:06,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214139212] [2021-05-02 22:46:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:06,121 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:06,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805454170] [2021-05-02 22:46:06,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:46:06,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:46:06,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:06,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 22:46:06,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:06,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 22:46:06,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:06,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214139212] [2021-05-02 22:46:06,424 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:06,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805454170] [2021-05-02 22:46:06,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805454170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:06,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:06,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:46:06,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531249171] [2021-05-02 22:46:06,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:46:06,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:06,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:46:06,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:46:06,426 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 22:46:06,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:06,551 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-05-02 22:46:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 22:46:06,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-02 22:46:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:06,553 INFO L225 Difference]: With dead ends: 49 [2021-05-02 22:46:06,553 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 22:46:06,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:46:06,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 22:46:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-05-02 22:46:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:46:06,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-02 22:46:06,566 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-02 22:46:06,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:06,566 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-02 22:46:06,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 22:46:06,567 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-02 22:46:06,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 22:46:06,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:06,568 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:06,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:46:06,771 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:06,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:06,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2021-05-02 22:46:06,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:06,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504512365] [2021-05-02 22:46:06,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:06,791 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:06,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427664714] [2021-05-02 22:46:06,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:46:06,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 22:46:06,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:06,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:46:06,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:06,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:06,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:07,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:07,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:07,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:07,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 48 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 22:46:07,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:07,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504512365] [2021-05-02 22:46:07,037 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:07,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427664714] [2021-05-02 22:46:07,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427664714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:07,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:07,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:46:07,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968882640] [2021-05-02 22:46:07,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:46:07,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:07,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:46:07,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:46:07,039 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 22:46:07,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:07,080 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 22:46:07,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:46:07,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-02 22:46:07,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:07,082 INFO L225 Difference]: With dead ends: 36 [2021-05-02 22:46:07,082 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:46:07,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:46:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:46:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:46:07,082 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 22:46:07,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:46:07,082 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-05-02 22:46:07,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:07,082 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:46:07,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 22:46:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:46:07,083 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:46:07,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:46:07,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:46:07 BasicIcfg [2021-05-02 22:46:07,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:46:07,297 INFO L168 Benchmark]: Toolchain (without parser) took 42757.43 ms. Allocated memory was 174.1 MB in the beginning and 227.5 MB in the end (delta: 53.5 MB). Free memory was 139.4 MB in the beginning and 84.8 MB in the end (delta: 54.6 MB). Peak memory consumption was 109.5 MB. Max. memory is 8.0 GB. [2021-05-02 22:46:07,297 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 174.1 MB. Free memory is still 156.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:46:07,297 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.65 ms. Allocated memory is still 174.1 MB. Free memory was 139.3 MB in the beginning and 157.1 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-02 22:46:07,297 INFO L168 Benchmark]: Boogie Preprocessor took 44.86 ms. Allocated memory is still 174.1 MB. Free memory was 157.1 MB in the beginning and 155.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:46:07,297 INFO L168 Benchmark]: RCFGBuilder took 309.45 ms. Allocated memory is still 174.1 MB. Free memory was 155.2 MB in the beginning and 140.7 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 22:46:07,297 INFO L168 Benchmark]: IcfgTransformer took 13.69 ms. Allocated memory is still 174.1 MB. Free memory was 140.7 MB in the beginning and 139.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:46:07,297 INFO L168 Benchmark]: TraceAbstraction took 42171.17 ms. Allocated memory was 174.1 MB in the beginning and 227.5 MB in the end (delta: 53.5 MB). Free memory was 139.1 MB in the beginning and 84.8 MB in the end (delta: 54.3 MB). Peak memory consumption was 109.3 MB. Max. memory is 8.0 GB. [2021-05-02 22:46:07,297 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 174.1 MB. Free memory is still 156.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 213.65 ms. Allocated memory is still 174.1 MB. Free memory was 139.3 MB in the beginning and 157.1 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.86 ms. Allocated memory is still 174.1 MB. Free memory was 157.1 MB in the beginning and 155.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 309.45 ms. Allocated memory is still 174.1 MB. Free memory was 155.2 MB in the beginning and 140.7 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.69 ms. Allocated memory is still 174.1 MB. Free memory was 140.7 MB in the beginning and 139.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 42171.17 ms. Allocated memory was 174.1 MB in the beginning and 227.5 MB in the end (delta: 53.5 MB). Free memory was 139.1 MB in the beginning and 84.8 MB in the end (delta: 54.3 MB). Peak memory consumption was 109.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 42126.8ms, OverallIterations: 8, TraceHistogramMax: 6, EmptinessCheckTime: 15.7ms, AutomataDifference: 34225.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 200 SDtfs, 92 SDslu, 815 SDs, 0 SdLazy, 545 SolverSat, 42 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 33666.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 289 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 4771.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=4, InterpolantAutomatonStates: 68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 88.7ms AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 57.7ms SsaConstructionTime, 351.0ms SatisfiabilityAnalysisTime, 5460.6ms InterpolantComputationTime, 293 NumberOfCodeBlocks, 279 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 285 ConstructedInterpolants, 0 QuantifiedInterpolants, 985 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1004 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 8 InterpolantComputations, 1 PerfectInterpolantSequences, 173/214 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...