/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/ps2-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:13:13,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:13:13,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:13:13,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:13:13,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:13:13,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:13:13,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:13:13,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:13:13,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:13:13,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:13:13,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:13:13,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:13:13,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:13:13,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:13:13,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:13:13,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:13:13,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:13:13,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:13:13,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:13:13,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:13:13,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:13:13,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:13:13,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:13:13,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:13:13,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:13:13,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:13:13,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:13:13,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:13:13,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:13:13,618 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:13:13,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:13:13,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:13:13,630 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:13:13,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:13:13,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:13:13,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:13:13,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:13:13,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:13:13,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:13:13,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:13:13,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:13:13,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:13:13,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:13:13,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:13:13,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:13:13,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:13:13,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:13:13,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:13:13,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:13:13,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:13:13,636 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:13:13,636 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:13:13,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:13:13,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:13:13,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:13:13,970 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:13:13,971 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:13:13,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound1.c [2021-05-06 10:13:14,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1669ea6c/2c861f828d924e5c9efde81783074bac/FLAG6973f4956 [2021-05-06 10:13:14,428 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:13:14,428 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound1.c [2021-05-06 10:13:14,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1669ea6c/2c861f828d924e5c9efde81783074bac/FLAG6973f4956 [2021-05-06 10:13:14,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1669ea6c/2c861f828d924e5c9efde81783074bac [2021-05-06 10:13:14,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:13:14,829 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:13:14,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:13:14,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:13:14,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:13:14,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:13:14" (1/1) ... [2021-05-06 10:13:14,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42d7bdeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:14, skipping insertion in model container [2021-05-06 10:13:14,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:13:14" (1/1) ... [2021-05-06 10:13:14,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:13:14,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:13:14,970 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/ps2-ll_unwindbound1.c[454,467] [2021-05-06 10:13:14,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:13:14,988 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:13:14,996 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/ps2-ll_unwindbound1.c[454,467] [2021-05-06 10:13:14,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:13:15,009 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:13:15,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:15 WrapperNode [2021-05-06 10:13:15,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:13:15,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:13:15,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:13:15,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:13:15,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:15" (1/1) ... [2021-05-06 10:13:15,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:15" (1/1) ... [2021-05-06 10:13:15,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:15" (1/1) ... [2021-05-06 10:13:15,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:15" (1/1) ... [2021-05-06 10:13:15,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:15" (1/1) ... [2021-05-06 10:13:15,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:15" (1/1) ... [2021-05-06 10:13:15,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:15" (1/1) ... [2021-05-06 10:13:15,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:13:15,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:13:15,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:13:15,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:13:15,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:13:15,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:13:15,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:13:15,146 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:13:15,146 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:13:15,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:13:15,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:13:15,146 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:13:15,146 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:13:15,146 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:13:15,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:13:15,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:13:15,147 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:13:15,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:13:15,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:13:15,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:13:15,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:13:15,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:13:15,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:13:15,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:13:15,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:13:15,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:13:15,403 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:13:15,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:13:15 BoogieIcfgContainer [2021-05-06 10:13:15,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:13:15,405 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:13:15,405 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:13:15,405 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:13:15,407 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:13:15" (1/1) ... [2021-05-06 10:13:15,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:13:15 BasicIcfg [2021-05-06 10:13:15,427 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:13:15,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:13:15,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:13:15,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:13:15,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:13:14" (1/4) ... [2021-05-06 10:13:15,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb0324a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:13:15, skipping insertion in model container [2021-05-06 10:13:15,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:13:15" (2/4) ... [2021-05-06 10:13:15,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb0324a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:13:15, skipping insertion in model container [2021-05-06 10:13:15,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:13:15" (3/4) ... [2021-05-06 10:13:15,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb0324a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:13:15, skipping insertion in model container [2021-05-06 10:13:15,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:13:15" (4/4) ... [2021-05-06 10:13:15,450 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound1.cJordan [2021-05-06 10:13:15,468 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:13:15,472 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:13:15,502 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:13:15,518 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:13:15,518 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:13:15,518 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:13:15,518 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:13:15,518 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:13:15,518 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:13:15,518 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:13:15,518 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:13:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:13:15,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 10:13:15,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:13:15,534 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:13:15,535 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:13:15,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:13:15,539 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-06 10:13:15,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:13:15,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042395949] [2021-05-06 10:13:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:13:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:13:15,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:13:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:13:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:13:15,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:13:15,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042395949] [2021-05-06 10:13:15,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042395949] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:13:15,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:13:15,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:13:15,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063612357] [2021-05-06 10:13:15,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:13:15,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:13:15,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:13:15,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:13:15,829 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:13:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:13:15,878 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-06 10:13:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:13:15,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 10:13:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:13:15,887 INFO L225 Difference]: With dead ends: 23 [2021-05-06 10:13:15,887 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 10:13:15,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:13:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 10:13:15,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-06 10:13:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:13:15,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 10:13:15,917 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 10:13:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:13:15,917 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 10:13:15,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:13:15,918 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 10:13:15,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 10:13:15,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:13:15,919 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:13:15,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:13:15,919 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:13:15,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:13:15,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-06 10:13:15,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:13:15,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629194075] [2021-05-06 10:13:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:13:15,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:13:15,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943043664] [2021-05-06 10:13:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:13:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:13:16,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:13:16,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:13:16,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:16,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:16,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:16,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:16,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:13:16,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:13:16,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629194075] [2021-05-06 10:13:16,187 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:13:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943043664] [2021-05-06 10:13:16,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943043664] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:13:16,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:13:16,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:13:16,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092558568] [2021-05-06 10:13:16,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:13:16,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:13:16,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:13:16,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:13:16,192 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:13:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:13:16,204 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-06 10:13:16,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:13:16,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 10:13:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:13:16,206 INFO L225 Difference]: With dead ends: 19 [2021-05-06 10:13:16,206 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 10:13:16,206 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:13:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 10:13:16,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 10:13:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:13:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 10:13:16,216 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 10:13:16,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:13:16,216 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 10:13:16,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:13:16,217 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 10:13:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 10:13:16,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:13:16,222 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:13:16,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:13:16,445 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:13:16,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:13:16,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-06 10:13:16,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:13:16,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225915270] [2021-05-06 10:13:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:13:16,457 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:13:16,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372429698] [2021-05-06 10:13:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:13:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:13:16,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:13:16,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:13:16,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:13:16,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:13:16,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225915270] [2021-05-06 10:13:16,556 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:13:16,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372429698] [2021-05-06 10:13:16,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372429698] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:13:16,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:13:16,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:13:16,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388268089] [2021-05-06 10:13:16,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:13:16,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:13:16,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:13:16,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:13:16,558 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:13:16,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:13:16,589 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 10:13:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:13:16,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 10:13:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:13:16,591 INFO L225 Difference]: With dead ends: 26 [2021-05-06 10:13:16,592 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 10:13:16,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:13:16,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 10:13:16,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 10:13:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:13:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 10:13:16,600 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 10:13:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:13:16,601 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 10:13:16,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:13:16,602 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 10:13:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 10:13:16,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:13:16,602 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:13:16,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:13:16,817 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:13:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:13:16,817 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-06 10:13:16,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:13:16,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684900844] [2021-05-06 10:13:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:13:16,827 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:13:16,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55122287] [2021-05-06 10:13:16,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:13:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:13:16,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:13:16,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:13:16,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:13:16,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:13:16,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684900844] [2021-05-06 10:13:16,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:13:16,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55122287] [2021-05-06 10:13:16,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55122287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:13:16,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:13:16,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:13:16,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285018911] [2021-05-06 10:13:16,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:13:16,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:13:16,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:13:16,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:13:16,941 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:13:16,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:13:16,975 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-06 10:13:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:13:16,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 10:13:16,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:13:16,978 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:13:16,978 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 10:13:16,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:13:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 10:13:16,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 10:13:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:13:16,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 10:13:16,987 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 10:13:16,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:13:16,987 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 10:13:16,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:13:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 10:13:16,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:13:16,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:13:16,989 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:13:17,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:13:17,205 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:13:17,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:13:17,206 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-06 10:13:17,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:13:17,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187705238] [2021-05-06 10:13:17,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:13:17,216 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:13:17,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272925131] [2021-05-06 10:13:17,216 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:13:17,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:13:17,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:13:17,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:13:17,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:13:17,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:17,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:17,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:17,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:17,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:17,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:17,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:17,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:13:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 10:13:17,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:13:17,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187705238] [2021-05-06 10:13:17,367 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:13:17,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272925131] [2021-05-06 10:13:17,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272925131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:13:17,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:13:17,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:13:17,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821673332] [2021-05-06 10:13:17,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:13:17,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:13:17,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:13:17,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:13:17,369 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:13:17,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:13:17,396 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2021-05-06 10:13:17,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:13:17,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 10:13:17,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:13:17,397 INFO L225 Difference]: With dead ends: 16 [2021-05-06 10:13:17,397 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 10:13:17,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:13:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 10:13:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 10:13:17,398 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) [2021-05-06 10:13:17,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 10:13:17,399 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-05-06 10:13:17,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:13:17,399 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 10:13:17,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:13:17,399 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 10:13:17,400 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 10:13:17,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:13:17,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:13:17 BasicIcfg [2021-05-06 10:13:17,616 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:13:17,617 INFO L168 Benchmark]: Toolchain (without parser) took 2788.38 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 169.3 MB in the beginning and 220.5 MB in the end (delta: -51.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:13:17,617 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 203.4 MB. Free memory is still 185.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:13:17,617 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.40 ms. Allocated memory is still 203.4 MB. Free memory was 169.1 MB in the beginning and 159.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 10:13:17,617 INFO L168 Benchmark]: Boogie Preprocessor took 63.73 ms. Allocated memory is still 203.4 MB. Free memory was 159.4 MB in the beginning and 187.0 MB in the end (delta: -27.6 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. [2021-05-06 10:13:17,617 INFO L168 Benchmark]: RCFGBuilder took 328.88 ms. Allocated memory is still 203.4 MB. Free memory was 186.6 MB in the beginning and 172.9 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 10:13:17,617 INFO L168 Benchmark]: IcfgTransformer took 22.52 ms. Allocated memory is still 203.4 MB. Free memory was 172.9 MB in the beginning and 171.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:13:17,618 INFO L168 Benchmark]: TraceAbstraction took 2188.14 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 171.3 MB in the beginning and 220.5 MB in the end (delta: -49.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:13:17,618 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 203.4 MB. Free memory is still 185.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 176.40 ms. Allocated memory is still 203.4 MB. Free memory was 169.1 MB in the beginning and 159.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.73 ms. Allocated memory is still 203.4 MB. Free memory was 159.4 MB in the beginning and 187.0 MB in the end (delta: -27.6 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 328.88 ms. Allocated memory is still 203.4 MB. Free memory was 186.6 MB in the beginning and 172.9 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 22.52 ms. Allocated memory is still 203.4 MB. Free memory was 172.9 MB in the beginning and 171.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2188.14 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 171.3 MB in the beginning and 220.5 MB in the end (delta: -49.1 MB). There was no memory consumed. 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 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2097.6ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 12.6ms, AutomataDifference: 189.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 87 SDtfs, 24 SDslu, 159 SDs, 0 SdLazy, 73 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 77.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 110.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=4, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 41.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 41.6ms SsaConstructionTime, 131.7ms SatisfiabilityAnalysisTime, 479.4ms InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 219 SizeOfPredicates, 5 NumberOfNonLiveVariables, 483 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 17/20 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...