/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/lcm2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:22:32,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:22:32,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:22:33,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 19:22:33,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:22:33,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:22:33,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:22:33,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:22:33,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:22:33,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:22:33,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:22:33,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:22:33,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:22:33,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:22:33,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:22:33,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:22:33,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:22:33,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:22:33,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:22:33,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:22:33,076 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:22:33,094 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:22:33,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:22:33,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:22:33,097 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:22:33,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:22:33,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:22:33,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:22:33,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:22:33,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:22:33,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:22:33,099 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:22:33,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:22:33,100 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:22:33,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:22:33,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:22:33,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:22:33,101 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:22:33,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:22:33,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:22:33,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:22:33,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:22:33,102 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:22:33,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:22:33,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:22:33,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:22:33,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:22:33,400 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:22:33,401 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:22:33,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/lcm2.c [2021-05-02 19:22:33,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f7631213/c8de35bc839a4da2961159c272e4e89c/FLAGfc97dd27b [2021-05-02 19:22:33,934 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:22:33,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/lcm2.c [2021-05-02 19:22:33,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f7631213/c8de35bc839a4da2961159c272e4e89c/FLAGfc97dd27b [2021-05-02 19:22:33,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f7631213/c8de35bc839a4da2961159c272e4e89c [2021-05-02 19:22:33,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:22:33,970 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:22:33,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:22:33,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:22:33,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:22:33,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:22:33" (1/1) ... [2021-05-02 19:22:33,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31be4e18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:22:33, skipping insertion in model container [2021-05-02 19:22:33,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:22:33" (1/1) ... [2021-05-02 19:22:33,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:22:34,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:22:34,122 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/lcm2.c[545,558] [2021-05-02 19:22:34,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:22:34,144 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:22:34,194 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/lcm2.c[545,558] [2021-05-02 19:22:34,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:22:34,228 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:22:34,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:22:34 WrapperNode [2021-05-02 19:22:34,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:22:34,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:22:34,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:22:34,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:22:34,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:22:34" (1/1) ... [2021-05-02 19:22:34,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:22:34" (1/1) ... [2021-05-02 19:22:34,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:22:34" (1/1) ... [2021-05-02 19:22:34,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:22:34" (1/1) ... [2021-05-02 19:22:34,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:22:34" (1/1) ... [2021-05-02 19:22:34,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:22:34" (1/1) ... [2021-05-02 19:22:34,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:22:34" (1/1) ... [2021-05-02 19:22:34,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:22:34,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:22:34,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:22:34,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:22:34,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:22:34" (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 19:22:34,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:22:34,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:22:34,358 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:22:34,359 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:22:34,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:22:34,359 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:22:34,359 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:22:34,359 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:22:34,360 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:22:34,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:22:34,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 19:22:34,360 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:22:34,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:22:34,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:22:34,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:22:34,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:22:34,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:22:34,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:22:34,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:22:34,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:22:34,657 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:22:34,658 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:22:34,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:22:34 BoogieIcfgContainer [2021-05-02 19:22:34,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:22:34,660 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:22:34,660 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:22:34,669 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:22:34,672 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:22:34" (1/1) ... [2021-05-02 19:22:34,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:22:34 BasicIcfg [2021-05-02 19:22:34,715 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:22:34,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:22:34,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:22:34,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:22:34,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:22:33" (1/4) ... [2021-05-02 19:22:34,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ce3def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:22:34, skipping insertion in model container [2021-05-02 19:22:34,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:22:34" (2/4) ... [2021-05-02 19:22:34,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ce3def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:22:34, skipping insertion in model container [2021-05-02 19:22:34,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:22:34" (3/4) ... [2021-05-02 19:22:34,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ce3def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:22:34, skipping insertion in model container [2021-05-02 19:22:34,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:22:34" (4/4) ... [2021-05-02 19:22:34,721 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2.cJordan [2021-05-02 19:22:34,728 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:22:34,733 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:22:34,747 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:22:34,772 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:22:34,773 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:22:34,773 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:22:34,773 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:22:34,773 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:22:34,773 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:22:34,773 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:22:34,773 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:22:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:22:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:22:34,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:22:34,796 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:22:34,796 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:22:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:22:34,801 INFO L82 PathProgramCache]: Analyzing trace with hash -959097297, now seen corresponding path program 1 times [2021-05-02 19:22:34,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:22:34,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600447255] [2021-05-02 19:22:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:22:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:22:35,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:22:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:22:35,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:22:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:22:35,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 19:22:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:22:35,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 19:22:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:22:35,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 19:22:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:22:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 19:22:35,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:22:35,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600447255] [2021-05-02 19:22:35,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600447255] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:22:35,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:22:35,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:22:35,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604540127] [2021-05-02 19:22:35,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:22:35,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:22:35,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:22:35,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:22:35,074 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:22:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:22:35,163 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-05-02 19:22:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:22:35,165 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-02 19:22:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:22:35,171 INFO L225 Difference]: With dead ends: 31 [2021-05-02 19:22:35,171 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 19:22:35,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:22:35,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 19:22:35,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 19:22:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:22:35,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-02 19:22:35,200 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 32 [2021-05-02 19:22:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:22:35,201 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-02 19:22:35,201 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:22:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-02 19:22:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:22:35,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:22:35,203 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:22:35,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:22:35,203 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:22:35,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:22:35,204 INFO L82 PathProgramCache]: Analyzing trace with hash 113255120, now seen corresponding path program 1 times [2021-05-02 19:22:35,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:22:35,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164357334] [2021-05-02 19:22:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:22:35,223 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:22:35,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940915334] [2021-05-02 19:22:35,224 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 19:22:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:22:35,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:22:35,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:22:35,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:22:35,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:22:35,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:22:35,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:22:35,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:22:35,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:22:35,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:22:35,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:22:35,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:22:35,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:22:35,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:22:35,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:22:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 19:22:35,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:22:35,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164357334] [2021-05-02 19:22:35,716 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:22:35,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940915334] [2021-05-02 19:22:35,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940915334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:22:35,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:22:35,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:22:35,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414829344] [2021-05-02 19:22:35,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:22:35,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:22:35,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:22:35,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:22:35,718 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:22:36,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:22:36,028 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-05-02 19:22:36,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:22:36,029 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-02 19:22:36,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:22:36,031 INFO L225 Difference]: With dead ends: 35 [2021-05-02 19:22:36,031 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 19:22:36,031 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:22:36,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 19:22:36,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 19:22:36,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:22:36,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-05-02 19:22:36,037 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 32 [2021-05-02 19:22:36,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:22:36,039 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-05-02 19:22:36,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:22:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-05-02 19:22:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 19:22:36,040 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:22:36,040 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:22:36,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:22:36,244 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:22:36,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:22:36,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1078128450, now seen corresponding path program 1 times [2021-05-02 19:22:36,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:22:36,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892397541] [2021-05-02 19:22:36,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:22:36,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:22:36,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122767414] [2021-05-02 19:22:36,268 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